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Impact of Wood Quality Assessments on Future Fibre Resources in the Pulp and Paper-making Industry
Item type: Journal Article • Journal: South African Forestry Journal • Authors: J.A. Wright --- Sappi Forests, Research Division, RSARecent evidence from research in Europe has indicated that individual trees can be sampled for their pulping properties by the removal of small quantities (5–50 g) of wood at about breast height (1,3 m above ground). Work began at Sappi's... -
Use of Ecological Site Classification in the Prediction of Forest Productivity and Response to Fertilisation
Item type: Journal Article • Journal: South African Forestry Journal • Authors: Reid Carter --- Forest Sciences Department, Canada Karel Klinka --- Forest Sciences Department, CanadaThe principals of biogeoclimatic ecosystem classification were used to stratify sites supporting immature stands of coastal Douglas-fir. The resulting strata were shown to represent unique segments of regional gradients of available soil moisture and nutrients. Regression models indicated strong relationships... -
A mathematical model for assessing the influence of stocking rate on the incidence of droughts and for estimating the optimal stocking rates1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: H.J. Fouché --- Department of Agriculture (Free State Region), J.M. De Jager --- Department of Agrometeorology, D.P.J. Opperman --- Departments of Pasture Science,The Putu 11 simulation model was used to simulate veld production for each of 47 years, using weather input data and soil properties of a site at Glen. Grassland drought was defined as that condition encountered when 100 kg/ha or... -
A comparison of five methods for assessing veld condition in the natal midlands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C A H Heard --- Department of Grassland Science, N M Tainton --- Department of Grassland Science, J Clayton --- Department of Grassland Science, M B Hardy --- Department of Agriculture (Natal Region),Site rankings obtained from five methods of scoring veld condition in the highland sourveld and the moist tall grassveld of the Natal Midlands were correlated with rankings from methods of multivariate analysis. With few exceptions, all methods gave rankings which... -
The development of veld assessment in the northern Transvaal savanna I. Red Turfveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M.H. Friedel --- Division of Wildlife and Rangelands Research, Australia A.C. Blackmore --- ,Grazing‐induced gradients in pasture species composition were characterized for the red turfveld of the Northern Transvaal savanna. A proposed classification of pasture species response to grazing was developed and the influence of state variables and driving forces other than grazing... -
Interrelationships between veld condition, herbage mass, stocking rate and animal performance in the Tall Grassland of Natal
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.R. Turner --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaGrazing trials were established at three sites in the Tall Grassveld of Natal. The objectives were to determine (a) patterns in herbage mass in relation to veld condition, stocking rate and commencement of spring grazing, and (b) animal performance in... -
Canopy temperature as a plant water stress indicator for nectarines
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Helga Tormann --- ,Three-year-old nectarine trees of the cultivar Independence grown in free-drainage lysimeters were exposed to a wet and a dry treatment, i.e. high soil moisture content throughout or progressive soil drying respectively. The canopy temperature of the trees was measured with... -
Implikasies van die oesindeks by navorsing verbouing van mielies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Departement Plantproduksie, R.E. Steynberg --- Departement Plantproduksie, E.A. Beyers --- Departement Plantproduksie, B. Kriel --- Departement Plantproduksie,Die oesindeks van mielies is bepaal in vier veldproewe. Verskille tussen mieliekultivars het voorgekom. Kultivars wat hoë graanopbrengste gelewer het in 'n kultivarproef, het ook deurgaans hoë oesindekswaardes gehad. In 'n langtermyn- bemestingsproef het behandelings wat kalium ontvang het, hoër... -
'n Vogstremmingsindeks vir gebruik in besproeiing van katoen
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republiek van Suid-Afrika Catharina Weyers --- , Republiek van Suid-AfrikaDie behoefte bestaan om plantparameters as kritiese indikatore aan te wend om besproeiingsbestuur te vergemaklik. Die blaarwaterpotensiaal (ψb) van katoen en relatiewe turgiditeit (RT%) van blaarskyfies is gedurende 1983 tot 1985 en tydens die 1986/87-seisoen bepaal. Hierdie metings is op... -
Interaction of nitrogen fertilization and irrigation water salinity on growth of maize (Zea mays L.) in a two-way line-source sprinkler system
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.E. Steynberg --- Department of Plant Production, Republic of South Africa D. Magnusson --- , Israel Y. Ben-Asher --- , Israel M. Silberbush --- , IsraelMaize was planted in a line-source sprinkler experiment in the Negev Desert in Israel. A double line-source system was used with one line source at right angles to the other. It was possible to create a gradient of salt concentration... -
Die verhouding van bogrondse plant materiaal tot wortelgroeiveranderlikes van mielies op die Rooipoort/Clansthal ekotoop
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Haarhoff --- , Repubüek van Suid-Afrika A. T.P. Bennie --- Departement van Grondkunde, Republiek van Suid-Afrika M. Hensley --- , Republiek van Suid-AfrikaDie verwantskap tussen bogrondse droëplantmassa, blaar- area-indeks en wortellengte vir mielies (Zea mays L. cv. PNR473) is op 'n Clansthal grondserie naby Potchefstroom ondersoek om sodoende 'n bydrae tot gewasmodellering te maak. Toekomstige wortellengtemetings kan moontlik by dié ekotoop en... -
Verwantskap tussen organiese materiaalinhoud van sekere onversteurde bogronde, grondeienskappe en klimaatsdata in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-AfrikaDie doel met die ondersoek was om vas te stel of die organiese materiaalinhoud van onversteurde ortiese A-horisonte, wat deur rooi apedale, geelbruin apedale en sagte plintiese B-horisonte onderlê word, vanaf beskikbare of maklik meetbare grondeienskappe en klimaatsdata bereken kan... -
Effek van bewerking op die organiese materiaalinhoud van geselekteerde droëlandgronde in Suid-Afrika
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika M. Hensley --- , Republiek van Suid-Afrika A. T.P. Bennie --- Departement van Grondkunde, Republiek van Suid-AfrikaDie doel van die ondersoek was om (1) die effek van bewerking op die organiese materiaalinhoud van gronde te kwantifiseer indien onversteurde gronde as verwysing dien; (2) die verband tussen bewerkingstyd en die afname in organiese materiaal te kry en... -
Maize response to plant population and soil water supply II. Plant barrenness and harvest index
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. van Averbeke --- Department of Agronomy, Ciskei J.N. Marais --- Department of Agronomy, CiskeiThe effects of level of water deficit and plant population density on plant barrenness and harvest index were investigated in a strictly controlled field experiment, repeated for four seasons. Differences in soil water supply were obtained by the seasonal variation... -
Effek van bewerkingstyd op die afname van totale swawel in geselekteerde Suid-Afrikaanse gronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-Afrika'n Afname van 4–70% in die totale S van bogronde as gevolg van bewerking het die vraag laat ontstaan hoe hierdie verlies verband hou met die periode van bewerking en of so 'n verwantskap tussen ekotope verskil. Bewerkte en nabygeleë... -
Die invloed van saaityd op koring in 'n Mediterreense klimaat II. Opbrengs en opbrengskomponente
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.W. Loubser --- Departement van Landbou: Wes-Kaap, Republiek van Suid-AfrikaVerskille in opbrengs en proteïen by koring (Triticum aestivum L.) kan beter verklaar word indien meer kennis beskikbaar is oor die effek wat saaityd daarop het. Vier lentekoringkultivars is in 1991 op drie lokaliteite met 'n tipiese Mediterreense klimaat gesaai... -
Measurement of radiant interception of crop canopies with the LAI-2000 plant canopy analyzer
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.Z. Jovanovic --- Department of Plant Production and Soil Science, Republic of South Africa J.G. Annandale --- Department of Plant Production and Soil Science, Republic of South AfricaThe performance of the plant canopy analyzer (PCA), model LAI-2000 (LI-COR, Lincoln, NE, USA), has been tested in two separate field trials for 18 annual crop and pasture species. The objective was to recommend appropriate techniques for reliable estimates of... -
The harvest index of individual ears of four South African wheat (Triticum aestivum L.) cultivars
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.A. Metho --- Department of Agriculture and Environmental Affairs KwaZulu-Natal, Technology Development and Training (FSR), Republic of South Africa P.S. Hammes --- Department of Plant Production and Soil Science, Republic of South AfricaIncreasing the harvest index is a major route to higher yields in regions where a crop has had a lengthy period of selection and adaptation. No information could be found on differences in the harvest indices of the main stems... -
Deriving a grain hardness calibration for Southern and Western Cape ground wheat samples by means of the particle size index (PSI) method and Fourier transform near infrared (FT-NIR) spectroscopy
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Manley --- Department of Food Science, Republic of South Africa L. van Zyl --- Department of Food Science, Republic of South Africa B.G. Osborne --- , AustraliaThe bread wheat hardness scenario among the Southern and Western Cape cultivars was investigated by deriving a FT-NIR hardness calibration for 198 ground bread wheat samples and using the particle size index (PSI) test as referencê method. Particle size index... -
Modelling the potential distribution of Karnal bunt of wheat in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.D. Stansbury --- Agriculture Western Australia, Western Australia Z.A. Pretorius --- Department of Plant Pathology, South AfricaThe objective of this paper was to use established meteorological modelling methods to determine wheat growing regions in South Africa that would be favourable to infection by Tilletia indica, and to determine whether irrigation schedules influence climatic suitability for the... -
Responses of Ethiopian durum wheat (Triticum turgidum var durum L.) genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Departments of Plant Sciences, South Africa M.T. Labuschagne --- Departments of Plant Sciences, South Africa A. T.P. Bennie --- Departments of Soil, Crop and Climate Sciences, South AfricaThe aim of this study was to identify yield components associated with drought tolerance in durum wheat. Twenty six durum wheat genotypes, from different agro-ecologies of Ethiopia were evaluated under moisture stress and non-stress conditions (35% and 70% available soil... -
Development of a simple empirical model for predicting maize yields in a semi-arid area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T.B. Zere --- Department of Soil, Republic of South Africa C.W. van Huyssteen --- Department of Soil, Republic of South Africa M. Hensley --- Department of Soil, Republic of South AfricaA yield prediction model is necessary, together with long-term climate data, to calculate the long-term yields needed for making a quantitative productivity evaluation of a crop ecotope in the form of a cumulative probability function (CPF). In this study the... -
Growth, phenological and yield responses of a bambara groundnut (Vigna subterranea (L.) Verdc.) landrace to imposed water stress under field conditions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South Africa AlbertT Modi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaBambara groundnut (Vigna subterranea (L.) Verdc.) is an underutilised species with potential to contribute nutritional and food security in marginal areas. Growth, phenology and yield of a local bambara groundnut landrace from Jozini, KwaZulu-Natal, characterised into three selections according to... -
A comparison of condition factor and gonadosomatic index of sardine Sardinops sagax stocks in the northern and southern Benguela upwelling ecosystems, 1984–1999
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: A. Kreiner C. D. van der Lingen P. FréonTime-series of condition factor (CF) and gonadosomatic index (GSI) were generated using general linear models (GLM) for sardine Sardinops sagax stocks in the northern and southern Benguela ecosystems over the period 1984–1999. During this period the biomass of sardine in... -
Reproduction and recruitment patterns of the surf clam Donax serra (Bivalvia, Donacidae) on two Namibian sandy beaches
Item type: Journal Article • Journal: South African Journal of Marine Science • Authors: J. Laudien T. Brey W. E. ArntzReproduction and recruitment of the surf clam Donax serra on two Namibian beaches were studied over a period of two years. Histological examination of the gonads indicated a discontinous annual reproductive cycle, related to monthly mean sea surface temperature. The... -
THE INVERTEBRATE FAUNA AND BIOTIC INDEX VALUE OF WATER QUALITY OF THE GREAT BERG RIVER, WESTERN CAPE
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: A. Coetzer --- , South AfricaThe invertebrate fauna was sampled at seven localities in the main stream of the Berg River in 1974. These results are discussed and compared with those of Harrison and Elsworth (1958). The results obtained were also used in applying the... -
SOME ASPECTS OF THE REPRODUCTION BIOLOGY OF LABEO CAPENSIS (SMITH, 1941) (PISCES, CYPRINIDAE) IN RELATION TO EXPLOITATION AND EXTREME ENVIRONMENTAL CONDITIONS IN HARDAP DAM, NAMIBIA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B.J. Van Zyl --- Department of Zoology, Research Unit for Aquatic and Terrestrial Ecosystems, South Africa C.J. Hay --- Department of Zoology, Research Unit for Aquatic and Terrestrial Ecosystems, South Africa G.J. Steyn --- Department of Zoology, Research Unit for Aquatic and Terrestrial Ecosystems, South AfricaThe sex ratio of Labeo capensisdid not differ significantly at a 95% confidence level from a 1♂:1♀, ratio during the study period. The smallest sexually mature male and female L. capensis were 20 cm and 21 cm FL, respectively. Fifty... -
THE EFFECT OF SEASON ON A BIOTIC WATER QUALITY INDEX: A CASE STUDY OF THE YELLOW JACKET AND MAZOWE RIVERS, ZIMBABWE.
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: B. Gratwicke --- , , ZimbabweThe effect of season on the South African Scoring System (SASS) biotic index for rapid assessment of water quality using benthic macroinvertebrates was investigated using the Yellow Jacket and Mazowe Rivers in Zimbabwe as a case study. Several impacts in... -
The grazing index method of range condition assessment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- Department of Agriculture, Republic of South AfricaOwing to the difficulty of examining succession theory in the Karoo, it is suggested the ecological index method (EIM), be replaced by the grazing index method (GIM), through the introduction of grazing index values (GIV) for Karoo plant species. The... -
Description of a method for assessing veld condition in the Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- , Republic of South AfricaIn the past, veld condition in the Karoo was assessed according to the ecological index method. This has recently been replaced by the grazing‐index method. The principles governing the method of botanical survey remain the same, but this methodology has... -
Research note: Grazing‐index method procedures of vegetation surveys
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- , Republic of South AfricaIn the past, veld condition in the Karoo was assessed using the ecological index method. This recently changed to the grazing‐index method on account of the differently estimated grazing‐index values being used. The principles governing the method of survey remain... -
Nodulation potential of four Trifolium repens cultivars under field conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PA Swanepoel --- Department of Agriculture: Western Cape, South Africa PR Botha --- Department of Agriculture: Western Cape, South Africa W Truter --- , South Africa AKJ Surridge-Talbot --- , South AfricaFour Trifolium repens (white clover) cultivars were evaluated under field conditions to determine the potential of these cultivars to sucessfully develop Rhizobium-associated root nodules. Nodulation of T. repens is often poor, because of suboptimal environmental conditions or absence of host-specific... -
The effect of a soil-amended hydrogel on the establishment of a Eucalyptus grandis x E. camaldulensis clone grown on the sandy soils of Zululand
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P. W.M. Viero --- , South Africa K.M. Little --- , South Africa D.G. Oscroft --- , South AfricaIn order to ensure the adequate survival of Eucalyptus grandis clonal hybrids on the sandy soils in the Zululand region of South Africa, seedlings are planted with large volumes of water (5 litres per planting pit). This results in a... -
A Cross-Cultural Exploration: Body Image in Older Black and White Women in the Workplace
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Helena Hewat --- University of Johannesburg, South Africa Marlene Arndt --- University of Johannesburg, South AfricaThis study investigated body image attitudes in a non-clinical sample of black and white older professional women in the workplace in South Africa. Participants were 125 professional women (white woman n=76 and black women n = 49). They completed the... -
![The derivation of cycle index of <em>Sn</em>
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The derivation of cycle index of Sn [3]
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: I.N. Kamuti J.O. Obon'goWe evaluate the cycle index polynomial of the reduced triple group Sn [3]. We also use similar techniques to derive the cycle index polynomial of the triple group Sn (3) which had earlier been found by Oberschelp (see... -
THE NIELSEN COINCIDENCE NUMBER OF MAPS INTO TORI
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jerzy Jezierski --- Department of Mathematics, University of Agriculture, Warszawa, Poland,We give a formula for the Nielsen coincidence number of a pair of maps from a surface into the 2-torus. We also show that a similar formula gives the lower bound of the number of connected components of the coincidence... -
Cultural obstacles to the rollout of antiretrovirals: an exploratorycross-country analysis
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Nicoli Nattrass --- , South AfricaThis article begins with an econometric analysis of potential socioeconomic determinants of highly active antiretroviral treatment (HAART) coverage. It shows that ‘cultural’ factors such as language diversity pose challenges to HAART coverage, but that the most important drivers of HAART... -
Sublethal effects of manganese on the haematology and osmoregulation of Oreochromis mossambicus after acute exposure
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Barnhoorn JHJ van VuurenOreochromis mossambicus were exposed for 96 hours to sublethal manganese concentrations in a continuous flow-through system. The sublethal concentrations were determined from the LC50 value of manganese (1.723mg/l), which included a 10% (172.3mg/l), 15% (259.8mg/l) and 20% (345.6mg/l) concentration of... -
The occurrence of the tapeworm Ligula intestinalis (L.), in Barbus paludinosus from a small dam in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Barson BE MarshallCestode parasites were collected from Barbus paludinosus from Munwahuku Dam near Harare, Zimbabwe over a period of 13 months. Plerocercoids of Ligula intestinalis were found in 7.2% of the fish. The majority of the infected fish carried one parasite, with... -
Development and application of a fish-based Sensitivity-weighted Index of Biotic Integrity (SIBI) for use in the assessment of biotic integrity in the Klip River, Gauteng, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PJ Kotze GJ Steyn HH du Preez CJ KleynhansBiotic indices using fish assemblage characteristics have been applied with great success in river assessments around the world. Internationally the most commonly applied fish index is the Index of Biotic Integrity (IBI), whilst in South Africa the most commonly applied... -
The Namibian Scoring System (NASS) version 2 rapid bio-assessment method for rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RW Palmer ED TaylorThis paper presents a rapid bio-assessment method for assessing the ecological condition of streams and rivers in Namibia. The method uses the composition and abundance of aquatic invertebrates, which are identified in the field, mostly to family level. The method... -
The South African Scoring System (SASS) Version 5 Rapid Bioassessment Method for Rivers
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C WS Dickens --- , South Africa PM Graham --- , South AfricaThe assessment of biota in rivers is a widely recognised means of determining the condition or ‘health’ of rivers. Benthic macroinvertebrates, in particular, are recognised as valuable organisms for bioassessments, due largely to their visibility to the naked eye, ease... -
Feeding dynamics of Palaemon peringueyi (Decapoda, Caridea) in the temporarily open/closed Kasouga Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PW Froneman --- Department of Zoology and Entomology, South Africa TO Henninger --- Department of Zoology and Entomology, South AfricaThe feeding ecology of the caridean shrimp Palaemon peringueyi in the temporarily open/closed Kasouga Estuary, Eastern Cape, was examined during summer and winter employing stomach fullness index (SFI) analysis. Mean SFI values for male and female shrimp during summer ranged... -
The breeding biology of the southern barred minnow Opsaridium peringueyi (Gilchrist and Thompson 1913) in the Incomati and Luvuvhu river systems, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSO Fouché --- Zoology Department, South Africa JA Venter --- School of Biological and Conservation Sciences, South AfricaData collected at two sites in the Luvuvhu and Sabie rivers show that, based on the gonadosomatic index, Opsaridium peringueyi has one major annual breeding event that occurs in early summer, following a period during which the general condition of... -
Impact of drain water on water quality and eutrophication status of Lake Burullus, Egypt, a southern Mediterranean lagoon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EM Ali --- Department of Environmental Sciences, EgyptThe ecological and biological status of Lake Burullus was examined in 2006 to determine its water quality and eutrophication status in response to the quality and quantity of drain water entering it. The lake suffers from excessive nutrient concentrations. Chlorophyll... -
A comparative assessment of the health status of feral populations of Clarias gariepinus from three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GN Madanire-Moyo --- Department of Biodiversity, South Africa WJ Luus-Powell --- Department of Biodiversity, South Africa A Jooste --- Department of Biodiversity, South Africa PAS Olivier --- Department of Biodiversity, South AfricaAn evaluation of the health status of feral populations of the freshwater catfish Clarias gariepinus was carried out between 2009 and 2010 at three dams in the Limpopo and Olifants river systems with varying levels of human impact. Fish health... -
Evaluation of the fish health assessment index in the Olifants River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RM Watson --- Department of Zoology, South Africa D Crafford --- Department of Zoology, South Africa A Avenant-Oldewage --- Department of Zoology, South AfricaThe fish health assessment index (HAI) biomonitoring technique, developed in the USA and subsequently tested in South Africa, was re-evaluated in the Olifants River system using Clarias gariepinus, Oreochromis mossambicus and Labeobarbus marequensis during drought and flood conditions in 1994–1997... -
Recovery dynamics of zooplankton following mouth-breaching in the temporarily open/closed Mdloti Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Deale --- School of Life Sciences, South Africa R Perissinotto --- School of Life Sciences, South Africa NK Carrasco --- School of Life Sciences, South AfricaMouth-breaching events have major impacts on biological processes in temporarily open/closed estuaries. The aim of this investigation was to monitor zooplankton recovery dynamics following artificial breaching of the Mdloti Estuary in February 2004. Spatial and temporal patterns in zooplankton distribution... -
Health of sharptooth catfish Clarias gariepinus in Pongolapoort Dam, South Africa: a comprehensive study
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KJ McHugh --- Centre for Aquatic Research, South Africa NJ Smit --- Water Research Group (Ecology), Unit for Environmental Sciences and Management, South Africa JHJ van Vuren --- Centre for Aquatic Research, South Africa JC van Dyk --- Centre for Aquatic Research, South AfricaA histology-based fish health assessment protocol was used in 2009–2010 to assess the health status of Clarias gariepinus from Pongolapoort Dam, South Africa. Nineteen fish were collected by angling. The histology of liver, kidney, gills and testes or ovaries was... -
Seasonal occurrence, distribution and diversity of phytoplankton in the Douala Estuary, Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AB Fonge --- Department of Botany and Plant Physiology, Cameroon BG Chuyong --- Department of Botany and Plant Physiology, Cameroon AS Tening --- Department of Chemistry, Cameroon AC Fobid --- Department of Botany and Plant Physiology, Cameroon NF Numbisi --- Department of Botany and Plant Physiology, CameroonThe occurrence and abundance of phytoplankton in the Wouri and Dibamba rivers and the Douala Estuary and their relationships to physico-chemical conditions were studied during the wet and dry seasons of 2008. One-hundred-and-sixty-eight species belonging to 67 genera were identified... -
7. Problems in Using Vegetation or Soil Classification in Determining Site Quality
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A. P.G. Schönau --- , South AfricaThis paper discusses the concepts of site and site quality and reviews briefly the determination of the latter. Site quality is viewed primarily as productive capacity of forest land, although other aspects are considered also. It is concluded that nowadays... -
Ecological status of Hout River Dam, Limpopo province, South Africa, using fish condition and health assessment index protocols: a preliminary investigation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Sara --- Aquaculture Research Unit, South Africa WJ Smit --- Department of Biodiversity, South Africa LJC Erasmus --- Department of Physiology and Environmental Health, South Africa TP Ramalepe --- Department of Biodiversity, South Africa ME Mogashoa --- Department of Physiology and Environmental Health, South Africa ME Raphahlelo --- Department of Biodiversity, South Africa J Theron --- Aquaculture Research Unit, South Africa WJ Luus-Powell --- Department of Biodiversity, South AfricaThe ecological status of Hout River Dam was evaluated in 2011 by assessing fish health, based on condition factor (K), health assessment index (HAI) and inverted parasite index (IPI), which provided a simple and rapid means of establishing the health... -
Distribution and enrichment of metals in sediments of the Ogun River within Abeokuta, south-western Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: KA Olatunde --- Department of Environmental Management and Toxicology, Nigeria TA Arowolo --- Department of Environmental Management and Toxicology, Nigeria BS Bada --- Department of Environmental Management and Toxicology, Nigeria AM Taiwo --- Department of Environmental Management and Toxicology, Nigeria ZO Ojekunle --- Department of Environmental Management and Toxicology, NigeriaThe distribution and enrichment of metals in the sediments of Ogun River within Abeokuta City, south-western Nigeria, were assessed in 2007. Replicate samples of sediments were collected from 10 sampling sites along the length of the river within the city... -
Quantification and representation of potential spatial interactions in the southern Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L. Drapeau L. Pecquerie P. Fréon L. J. ShannonThis work explores the potential spatial interactions between 13 key commercial species of the southern Benguela ecosystem: sardine Sardinops sagax, anchovy Engraulis encrasicolus, round herring Etrumeus whiteheadi, horse mackerel Trachurus trachurus capensis, chub mackerel Scomber japonicus, chokka squid Loligo vulgaris... -
Reproductive biology of horse mackerel Trachurus capensis and Trachurus trecae in Namibia and Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HON Ndjaula --- Department of Biology, Norway J-O Krakstad --- , Norway OS Kjesbu --- , NorwayHarvest control measures for Namibia and Angola are defined using reference points for spawning biomass, which requires knowledge of spawning potential and dynamics of fishery stocks. The reproductive biology of two species of horse mackerel, Trachurus capensis and Trachurus trecae,... -
Assessing Pharmaceutical Innovation in Tunisia: An Empirical Survey on Firms' Knowledge-Capital and an Analysis of the National Sectoral Innovation System
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nejla Yacoub --- Faculty of Economics and Management Sciences, TunisiaThe objective of this research was to assess pharmaceutical innovation in Tunisia. First, we examined the national sectoral innovation system (NSIS), focusing on the objectives and instruments of the industrial and innovation policy. Second, we adopted an empirical approach based... -
The effect of a soil-amended hydrogel on the establishment of a Eucalyptus grandis clone on a sandy clay loam soil in Zululand during winter
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: P.W.M. Viero --- , South Africa K.E.A. Chiswell --- , South Africa J.M. Theron --- , South AfricaTo ensure acceptable survival and growth of Eucalyptus grandis clonal material planted in the sandy clay loam soils of the Zululand interior of South Africa, the current planting season is limited to the summer rainfall period. A field trial was... -
Foliar nutrient levels as indicators of site quality for Pinus patula in the Mpumalanga escarpment area
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.R. Louw --- , M.C. Scholes --- School of Plant, Animal & Environmental Sciences, South AfricaThe South African forest industry is based on intensively managed monoculture systems, and requires diagnostic tools for the development of site-related nutrient management policies. Worldwide, the evaluation of foliar nutrient concentrations is one of the most widely used techniques in... -
Site and stand analysis for growth prediction of Eucalyptus grandis on the Zululand coastal plain
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: M. du Plessis --- , J Zwolinski --- ,The integration of site information with that of tree growth is of special importance in Zululand, where sustainable supply of timber is essential for local processing and export commitments. Site prediction growth models need to be based on easily attainable... -
Estimating the leaf area index (LAI) of black wattle from Landsat ETM+ satellite imagery
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.T. Ghebremicael --- School of Applied Environmental Sciences, Faculty of Science and Agriculture, South Africa C.W. Smith --- , South Africa F.B. Ahmed --- School of Applied Environmental Sciences, Faculty of Science and Agriculture, South AfricaRemote sensing techniques have the potential to provide resource managers with a rapid and economical method of acquiring information related to forest productivity and water use. This study evaluated the utility ofLandsat ETM +satellite imagery to predict canopy attributes ofBlack... -
Spatial changes in forest cover on the KwaNibela Peninsula, St Lucia, South Africa, during the period 1937 to 2008
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: BM Corrigan --- Department of Botany and Plant Biotechnology, South Africa M Kneen --- Department of Geography, Environmental Management and Energy Studies, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, South Africa B-E van Wyk --- Department of Botany and Plant Biotechnology, South AfricaThe KwaNibela Peninsula is situated in the northernmost region of Lake St Lucia in KwaZulu-Natal. It is covered by forest patches of either Sand Forest or Coastal Forest within the Maputaland Coastal Vegetation. The area and the forests are heavily... -
The pulp and paper properties of Sirex noctilio infested and fire-damagedthermomechanically pulped, South African grown Pinus patula
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: M du Plessis --- , South Africa NJ le Roux --- Department of Statistics and Actuarial Science, South Africa S Gardner-Lubbe --- Department of Statistical Sciences, South Africa JPJ Swart --- Department of Forest and Wood Science, South Africa T Rypstra --- Department of Forest and Wood Science, South AfricaPinus patula is the softwood species most extensively planted in South Africa. However, large portions of these plantings are under threat from Sirex noctilio infestation and occasional forest fires. In this exploratory investigation, the effects of tree age, Sirex noctilio... -
Selection of Corymbia citriodora for pulp productivity
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JT Brawner --- , Australia R Meder --- , Australia M Dieters --- School of Land, Crop and Food Sciences, Australia DJ Lee --- , AustraliaEvaluation of a series of spotted gum (Corymbia citirodora) progeny trials, established in the subtropical region of Queensland, Australia, was undertaken to provide information for the development of advanced-generation breeding populations suitable for pulp production. Measurements of growth at two... -
Effects of irregular stand structure on tree growth, crown extension and branchiness of plantation-grown Pinus patula
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Simon A Ackerman --- Department of Forest and Wood Science, South Africa Pierre A Ackerman --- Department of Forest and Wood Science, South Africa Thomas Seifert --- Department of Forest and Wood Science, South AfricaThe practice of combining row and selective thinning in commercial pine plantation silviculture carries the risk of unwanted irregularities in tree distribution, a situation that is aggravated when tree selection during marking is poor. The potential consequences of poor tree... -
Ecological integrity assessment of the fish assemblages of the Matigulu/Nyoni and Umvoti estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GC O'Brien --- Centre for Aquatic Research, Zoology Department, South Africa R Swemmer --- Centre for Aquatic Research, Zoology Department, South Africa V Wepener --- Centre for Aquatic Research, Zoology Department, South AfricaThe estuarine fish community index (EFCI) and an estuarine fish guild assessment (EFGA) were used in 2004 and 2008 to determine the ecological state and effects of selected ecosystem variables on the Umvoti and Matigulu/Nyoni estuaries. The EFCI indicated that... -
Towards the development of environmental indices for the Namibian shelf, with particular reference to fisheries management
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Bartholomae AK van der PlasThe Namibian Ministry of Fisheries and Marine Resources has the task of collecting and providing relevant oceanographic information for management of their fisheries. However, quality information is difficult to provide because of the complexity of the processes involved in the... -
Application of a chlorophyll index derived from satellite data to investigate the variability of phytoplankton in the Benguela ecosystem
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: H Demarcq R Barlow L HutchingsThe spatial and temporal variability in phytoplankton biomass in the Benguela ecosystem was investigated over an 8-year period using a chlorophyll index (Chl Index) derived from low resolution SeaWiFS ocean colour data. Monthly composite images revealed that the surface chlorophyll... -
Use of environmental parameters to explain the variability in spawnerrecruitment relationships of Namibian sardine Sardinops sagax
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CH Kirchner --- National Marine Information and Research Centre, Namibia CH Bartholomae --- National Marine Information and Research Centre, Namibia A Kreiner --- National Marine Information and Research Centre, NamibiaThis study attempts to explain the variability in recruitment of sardine in the northern Benguela and to develop potential models by including environmental information to predict recruitment. Two different recruitment and spawner number datasets were available: a VPA-developed dataset, for... -
Estimation of height growth patterns and site index curves for Pinus radiata plantations in New South Wales, Australia
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: A HaywoodThe objective of this study was to estimate the mean top height growth patterns and site index curves (base index age 20 years) for Pinus radiata stands grown in New South Wales, Australia. Garcia's stochastic differential equation version of the... -
Turning the Big Mac Index into the Medical MAC Index
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: JM Wilson --- Mackay Anaesthetic Group, Australia TK Wilson --- Wilson's Recruitment Solutions, AustraliaObjective: The purpose of this study was to create a global medical earnings index, called the Medical MAC Index, to enable a comparison of what medical specialists earn in the countries included in the study. -
Postmenopausal symptoms in a group of rural Xhosa women
Item type: Journal Article • Journal: South African Family Practice • Authors: TJ Friderichs DR Hall --- Department of Obstetrics and Gynaecology, South AfricaBackground: To describe the incidence and understanding of early postmenopausal symptoms in rural Xhosa women. -
A cross-sectional survey on the lifestyle and health-seeking behaviour of Basotho patients with diabetes
Item type: Journal Article • Journal: South African Family Practice • Authors: PN Makinga --- Northdale Hospital, South Africa A Beke --- School of Health Systems and Public Health; University of Pretoria,Objectives: The objectives of the study were to determine the level of practice of a healthy lifestyle, to assess the health education provided to patients with diabetes and to determine the prevalence of obesity among Basotho patients with diabetes. -
Modelling dominant height and site index in different edaphoclimatic zones of Nothofagus dombeyi secondary forest in the Andes of south-central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Carlos Esse --- Universidad Católica de Temuco, Escuela de Ciencias Forestales, Chile Pablo J Donoso --- Universidad Austral de Chile, Instituto de Bosques y Sociedad, Chile Víctor Gerding --- Universidad Austral de Chile, Instituto de Bosques y Sociedad, Chile Celso Navarro --- Universidad Católica de Temuco, Escuela de Ciencias Forestales, Chile Francisco Encina-Montoya --- Universidad Católica de Temuco, Escuela de Ciencias Ambientales, ChileNothofagus dombeyi grows in a wide variety of sites. The information about its productivity is still scarce, which makes it difficult for foresters and landowners to take decisions about the best practices to maintain and/or improve the goods and services... -
Diagnosing the sexual pattern of Diplodus cervinus hottentotus (Pisces: Sparidae) from southern Angola
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: AC Winkler --- Department of Ichthyology and Fisheries Science, South Africa CV Santos --- Faculdade Ciências da Universidade Agostinho Neto (FCUAN), Angola WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe sexual pattern of Diplodus cervinus hottentotus was investigated in southern Angola. Females were significantly smaller and found in greater numbers, with an adult sex ratio of 1.0:0.7, F:M. Histological observations of preserved gonads indicated that the species is a... -
Abundance of earthworms in Nigerian ecological zones: implications for sustaining fertilizer-free soil fertility
Item type: Journal Article • Journal: African Zoology • Authors: S. O. Owa --- Department of Biological Sciences, Nigeria G. A. Dedeke --- Department of Biological Sciences, Nigeria S. O. A. Morafa --- Department of Soil Science and Farm Mechanization, Nigeria J. A. Yeye --- Department of Geography and Regional Planning, NigeriaThe abundance of earthworms in the ecological zones in Nigeria has been determined and the possibility of earthworm functions replacing both mechanized land preparation and organic fertilizers discussed. The most abundant earthworms, comprising 62 % of the population, were the... -
A comparative analysis of the diets of Varanus albigularis and Varanus niloticus in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Kim Dalhuijsen --- Animal, Plant and Environmental Sciences, University of the Witwatersrand, South Africa William R. Branch --- Bayworld, South Africa Graham J. Alexander --- Animal, Plant and Environmental Sciences, University of the Witwatersrand, South AfricaWe present data from gut content analyses of Varanus albigularis (savanna monitor) and V. niloticus (water monitor) in South Africa. Both species are generalist, opportunistic feeders. We did not detect any sex-based differences in the diet of V. albigularis, and... -
Maturity, spermatogenesis and seasonal reproductive cycle of male Rhinobatos annulatus (Muller & Henle, 1841) from Algoa Bay, South Africa, and a novel description for sperm release from the spermatocyst
Item type: Journal Article • Journal: African Zoology • Authors: G.J. Rossouw --- Department of Zoology, South AfricaDespite the unique gonadal organization and reproductive strategies known for elasmobranchs very little is known about the reproductive biology of local species. The stages of spermatogenesis for the lesser guitar fish, Rhinobatus annulatus, has not been described and specifically the... -
Cellular responses of the starfish Parvalustra exigua to metal pollution in False Bay, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Sophié A. Reinecke --- Department of Botany and Zoology, South Africa Adriaan J. Reinecke --- Department of Botany and Zoology, South AfricaThe cushion sea star Parvalustra exigua from five sites along the shore of False Bay on the southern coast of South Africa was studied using two cellular biomarkers, the neutral red retention assay (NRR) and the lysosomal destabilization assay (DI)... -
Growth, physiology and yield responses of Amaranthus cruentus, Corchorus olitorius and Vigna unguiculata to plant density under drip-irrigated commercial production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Innocent Maseko --- University of South Africa, South Africa Yacob G Beletse --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Noluyolo Nogemane --- University of South Africa, South Africa CP du Plooy --- Agricultural Research Council–Roodeplaat Vegetable and Ornamental Plant Institute, South Africa Tafadzwanashe Mabhaudhi --- Crop Science, School of Agricultural, Earth and Environmental Sciences, South AfricaAmaranthus cruentus, Corchorus olitorius and Vigna unguiculata are traditional leafy vegetables with potential to improve nutritional security of vulnerable people. The promotion of these crops is partly hindered by the lack of agronomic information. The effect of plant spacing on... -
On construction of index funds in South Africa
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: D J Bradfield --- Department of Statistical Sciences, C S Ardington --- Department of Statistical Sciences,Index funds, an increasingly popular form of investment in the US and UK since the 1970s, have recently emerged in South Africa. This paper examines two methods of constructing index funds in the South African environment. These two methods, namely... -
Market segmentation and the cost of equity of companies listed on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: C Correia --- Department of Accounting, E Uliana --- Department of Accounting,The segmentation between the Resources/Mining and the Financial and Industrial sectors on the Johannesburg stock exchange and the relative historical dominance of the Mining sector in relation to other international markets poses questions about whether the All share data or... -
The market impact on shares entering or leaving JSE indices
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Craig Miller --- Gordon Institute of Business Science, South Africa Michael Ward --- Gordon Institute of Business Science, South AfricaA company's entry into (or exit from) a major share index provides a special opportunity to examine price discovery. In an efficient market, we expect the demand curve to remain horizontal and to be unaffected by external events that do... -
The relative tracking ability of South African exchange traded funds and index funds
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Barry Strydom --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South Africa Ailie Charteris --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South Africa Kerry McCullough --- School of Accounting, Economics and Finance, Pietermaritzburg Campus, South AfricaThe Efficient Market Hypothesis holds that it is not possible to ‘beat the market’ and that a passive investment strategy is optimal. Traditionally investors have been able to do this by investing in index funds replicating an index, but the... -
Technological capacity and other determinants of economic performance in African countries: Panel data evidence
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Albert A. Okunade --- Department of Economics, USAThe determinants of aggregate economic performance in African countries are economic, institutional and political. To date, rarely has research included a specific conceptual measure of technological index among the core determinants. Consequently, for the first time in the economic development... -
Sex differences in correlates of obesity indices and blood pressure among Malay adults in Selangor, Malaysia
Item type: Journal Article • Journal: South African Family Practice • Authors: A Norfazilah --- Faculty of Medicine, Department of Community Health, Malaysia MS Julaina --- Faculty of Medicine, Department of Community Health, Malaysia MN Azmawati --- Faculty of Medicine, Department of Community Health, MalaysiaBackground: Obesity is a risk factor for many chronic diseases and related morbidity and mortality. It is imperative to identify the best index of obesity which has the strongest relationship to blood pressure in various populations. The main aim of... -
Ecosystem-specific water quality indices
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: I Rangeti --- Department of Community Health Studies, South Africa B Dzwairo --- Institute for Water and Wastewater Technology, South Africa GJ Barratt --- Department of Community Health Studies, South Africa FAO Otieno --- Technology, Innovation and Partnerships, South AfricaThe water quality index (WQI) has emerged as a central tool for analysing and reporting quality trends since 1965. It provides a better overview of water quality variability in a catchment than conventional monitoring programmes that use individual variables. Since... -
Application of multivariate statistics and toxicity indices to evaluate the water quality suitability for fish of three rivers in the Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R Gerber --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Unit for Environmental Sciences and Management, South Africa NJ Smit --- Unit for Environmental Sciences and Management, South AfricaThe water quality of the Olifants, Letaba and Luvuvhu rivers within the Kruger National Park was assessed for their suitability to sustain fish populations. Since water quality assessments result in huge datasets, principal component analysis and an aquatic toxicity index... -
Impact of land use on water quality in the Likangala catchment, southern Malawi
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Pullanikkatil --- Department of Geography and Environmental Sciences, South Africa LG Palamuleni --- Department of Geography and Environmental Sciences, South Africa TM Ruhiiga --- Department of Geography and Environmental Sciences, South AfricaIn southern Malawi, the Likangala River, which is important for irrigation, domestic use and fishing, is affected by various land uses along its catchment. The impact of urbanisation and agriculture on the water quality of this river was investigated in... -
A Review of “Place Images and Nation Branding in the African Context: Challenges, Opportunities, and Questions for Policy and Research”, (Nicolas Papadopoulos and Leila Hamzaoui-Essoussi)
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Eugene D. Jaffe --- Ruppin Academic Center, IsraelThis review of Nicolas Papadopoulos and Leila Hamzaoui-Essoussi's paper “Place Images and Nation Branding in the African Context: Challenges, Opportunities, and Questions for Policy and Research” touches upon the authors’ objectives and the extent to which they have been carried... -
An original risk of ovarian malignancy index and its predictive value in evaluating the nature of ovarian tumour
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Vesna Antovska --- Department of Urogynecology, Macedonia Milka Trajanova --- Department of Urogynecology, MacedoniaBackground: We carried out this study to evaluate the predictive value of an original risk of ovarian malignancy index (ROMI) devised by us. -
Transvaginal colour Doppler ultrasound in predicting response to chemoradiation in patients with carcinoma of the cervix
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Mishu Mangla --- SMS Medical College, India Deepak Singla --- Department of Anaesthesia,Background: The objective of the study was to evaluate the potential role of transvaginal colour Doppler ultrasound (TVCDUS) in predicting response to chemoradiotherapy in patients with locally advanced cervical cancer. -
Leachate contamination potential of a waste dumpsite in Effurun City, Southern Nigeria using the leachate pollution index
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Iwekumo Ebibofe Agbozu --- Department of Environmental Science, College of Science, Nigeria Osayomwanbor Ebenezer Oghama --- Department of Environmental Science, College of Science, Nigeria Olaide Opeyemi Akinyemi --- Department of Environmental Science, College of Science, NigeriaThe leachate pollution index (LPI) has been used to quantify the leachate contamination potential of a dumpsite in Effurun, Southern Nigeria. Leachate samples were collected from 3 locations in the dumpsite and labeled L1, L2 and L3. Replicates were collected... -
The reproductive biology of an open-water spawning Lake Malawi cichlid, Copadichromis chrysonotus
Item type: Journal Article • Journal: African Zoology • Authors: Lance W. Smith --- Research Officer, MalawiCopadichromis chrysonotus is a zooplanktivorous cichlid member of the diverse fish community inhabiting Lake Malawi’s rocky, littoral habitat. Like most Lake Malawi cichlids, this species’ reproductive strategy is based on maternal mouthbrooding, but it is the only littoral species known... -
Intraspecific associations of individual brown-headed parrots (Poicephalus cryptoxanthus)
Item type: Journal Article • Journal: African Zoology • Authors: Stuart Taylor --- School of Botany and Zoology, University of KwaZulu Natal, South Africa Michael R. Perrin --- School of Botany and Zoology, University of KwaZulu Natal, South AfricaBrown headed parrots (Poicephalus cryptoxanthus) are often seen in large feeding flocks during summer and in pairs during winter. This has led to the belief that pair bonds within the species are ephemeral, lasting as long as the breeding season... -
Feeding rank in the Derby eland: lessons for management
Item type: Journal Article • Journal: African Zoology • Authors: Pavla Jůnková Vymyslická --- Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences, Karolína Brandlová --- Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences, Kateřina Hozdecká --- Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences, Magdalena Žáčková --- Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences, Pavla Hejcmanová --- Department of Animal Science and Food Processing, Faculty of Tropical AgriSciences,Transfers to new breeding herds and supplementary feeding are crucial management steps for small populations of ungulates. However, the successful realisation of those steps is strongly dependent on social interactions among individuals. Agonistic encounters connected with feeding determine the quality... -
An assessment of the reproductive biology of the Marico barb Barbus motebensis from the upper Groot Marico catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Kindler --- Department of Zoology, South Africa GM Wagenaar --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa OLF Weyl --- Centre for Invasion Biology, SAIAB, South AfricaBarbus motebensis is endemic to the Groot Marico River catchment in the North West province, South Africa, and is considered of particular conservation importance due to being Red-Listed as Vulnerable. Due to its vulnerable conservation status, the aim of this... -
Occurrence, abundance and distribution of benthic macroinvertebrates in the Nyando River catchment, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: DA Abong'o --- Department of Chemistry, School of Physical Sciences, Kenya SO Wandiga --- Department of Chemistry, School of Physical Sciences, Kenya IO Jumba --- Department of Chemistry, School of Physical Sciences, Kenya PJ Van den Brink --- Aquatic Ecology and Water Quality Management Group, The Netherlands BB Naziriwo --- Department of Chemistry, Uganda VO Madadi --- Department of Chemistry, School of Physical Sciences, Kenya GA Wafula --- Department of Chemistry, School of Physical Sciences, Kenya P Nkedi-Kizza --- Soil and Water Science Department, USA H Kylin --- Department of Water and Environmental Studies, SwedenA baseline study was conducted of the occurrence of macroinvertebrates at 26 sites in the Nyando River catchment in 2005–2006. A total of 13 orders and 16 families of Arthropoda, Mollusca, Platyhelminthes and Annelida were collected, with the order Ephemeroptera... -
Factorial invariance of the Rahim emotional quotient index
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Martina Kotzé --- Business School, University of the Free State, South Africa Petrus Nel --- Department of Industrial Psychology, South AfricaThis study investigated the degree of factorial invariance of the 30-item Rahim Emotional Quotient Index (REQI) (Afzalur Rahim et al., 2002) across gender and language, using multiple group confirmatory factor analysis. Respondents were 341 full-time employed applicants to programmes in... -
Assessing the value of wetlands to waterbirds: exploring a population-based index at flyway and regional levels
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Doug M Harebottle --- Animal Demography Unit, Department of Biological Sciences, South Africa Les G Underhill --- Animal Demography Unit, Department of Biological Sciences, South AfricaTraditionally, species richness, species diversity, total count, biomass, energy consumption and the Ramsar ‘1% threshold’ have been used to assess the importance of wetlands for waterbirds. Designation of wetlands of international importance (Ramsar sites) based on waterbirds has focused on... -
Lung function decline is accelerated in South Africans with cystic fibrosis
Item type: Journal Article • Journal: South African Family Practice • Authors: R Masekela --- Faculty of Health Sciences, Department of Paediatrics and Child Health, Division of Paediatric Pulmonology, Steve Biko Academic Hospital, South Africa S Olorunju --- Biostatistics Unit, South Africa RJ Green --- Faculty of Health Sciences, Department of Paediatrics and Child Health, Division of Paediatric Pulmonology, Steve Biko Academic Hospital, South Africa NT Magidimisa --- Faculty of Health Sciences, Department of Paediatrics and Child Health, Division of Paediatric Pulmonology, Steve Biko Academic Hospital, South AfricaBackground: Poor nutritional status has been shown to be associated with a significant decline in lung function in patients with cystic fibrosis. There are few data published on the lung function decline and the effects of nutritional status in cystic... -
Mytilus galloprovincialis (Mollusca: Bivalvia) in a warm-temperate South African estuarine embayment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Pollard --- Department of Zoology and Entomology, Knysna Basin Project, South Africa AN Hodgson --- Department of Zoology and Entomology, Knysna Basin Project, South AfricaThe distribution, population structure, condition and gonad indices, and the attachment strengths of the invasive Mediterranean mussel Mytilus galloprovincialis are described from the Knysna Estuary, South Africa. Mussels were found in the rocky intertidal at the mouth of the estuary... -
Metal enrichment in water and fish in a semi-urban Nigerian lake, and their associated risks
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CD Ezeonyejiaku --- Department of Zoology, Nigeria MO Obiakor --- School of Environmental and Rural Science, AustraliaTrace metal (Zn, Pb, Cu, Cr and Cd) concentrations in the water column and in the liver, muscle and gill tissues of Parachanna obscura and Clarias gariepinus in Agulu Lake, Nigeria, were investigated in June 2014 and compared with WHO... -
Determinants of obesity in an urban township of South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: R Malhotra --- Department of Community and Family Medicine, USA C Hoyo --- Department of Community and Family Medicine, USA T Østbye --- Department of Community and Family Medicine, USA G Hughes --- Departments of Family Medicine and Surgery, Brody School of Medicine, USA D Schwartz --- Department of Community and Family Medicine, USA L Tsolekile --- School of Public Health, South Africa J Zulu --- School of Public Health, South Africa T Puoane --- School of Public Health, South AfricaObjective: To estimate the prevalence of overweight and obesity, and identify factors associated with Body Mass Index (BMI) and waist circumference (WC) among adults residing in an urban township in South Africa. -
Overweight, obesity and underweight in rural black South African children
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Al. Toriola --- Department of Sports, Vk Moselakgomo --- Department of Sports, Bs. Shaw --- Department of Sports, Dt Goon --- Centre for Biokinetics, Recreation and Sport Science,Background: The objective was to estimate the prevalence of overweight, obesity and underweight conditions among rural black children in South Africa. A cross-sectional study was undertaken. The setting was Mankweng and Toronto, both rural settlements in Capricorn district, Limpopo province,... -
Tuck-shop purchasing practices of Grade 4 learners in Pietermaritzburg and childhood overweight and obesity
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nl Wiles --- Lecturer, Dietetics and Human Nutrition, Jm Green --- Senior Research Associate, Rural Resource Management, Fj Veldman --- Associate Professor, Dietetics and Human Nutrition,Objectives: To determine the anthropometric characteristics of Grade 4 learners in relation to their tuck-shop purchasing practices. -
An investigation into utilising gestational body mass index as a screening tool for adverse birth outcomes and maternal morbidities in a group of pregnant women in Khayelitsha
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Hr Davies --- Division of Human Nutrition, J Visser --- Division of Human Nutrition, M Tomlinson --- Department of Psychology, Mj Rotheram-Borus --- Semel Institute and the Department of Psychiatry University of California, USA C Gissane --- School of Human and Applied Science, UK J Harwood --- Semel Institute and the Department of Psychiatry University of California, USA I LeRoux --- Philani Child Health and Nutrition Centre,Objective: The aim of this study was to investigate the ability of the gestational body mass index (BMI) method to screen for adverse birth outcomes and maternal morbidities. -
Overweight, obesity and underweight in nurses in Vhembe and Capricorn districts, Limpopo
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Dt Goon --- Centre for Biokinetics, Recreation and Sport Science, Ms Maputle --- Department of Advanced Nursing and Science, A Olukoga --- Department of Public Health, R Lebese --- Department of Advanced Nursing and Science, Lb Khoza --- Department of Advanced Nursing and Science, Fc Ayanwu --- Department of Public Health,Background: In South Africa, anecdotal evidence concerning the prevalence of overweight and obesity in nurses is alarming, but no scientific studies have confirmed this notion. This study aimed to determine the prevalence of underweight, overweight and obesity in black nurses... -
Glycaemic index of selected staple carbohydrate-rich foods commonly consumed in Botswana
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: So Mahgoub --- Kaplan University, M Sabone --- School of Nursing, J Jackson --- Centre for Scientific Research,Objectives: Data on the glycaemic index (GI) of foods commonly consumed in Botswana are lacking. The present study aimed to evaluate the GI of some of the staple carbohydrate-rich foods eaten in Botswana. -
Determinants of obesity and perception of weight in hypertensive patients in rural South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Pr Duncan --- Academic Clinical Fellow and General Practice Trainee, Bristol Ld Howe --- MRC Integrative Epidemiology Unit University of Bristol, Bristol Z. Manukusa --- Manguzi Hospital, Durban S. Purdy --- Academic Clinical Fellow and General Practice Trainee, BristolObjective: The objective of the study was to identify factors associated with being overweight or obese, and perceptions of weight by hypertensive patients living in rural South Africa. -
Patient safety and nutrition: is there a connection?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Christina Nieuwoudt --- University of Pretoria Past Chairperson, United Arab EmiratesNutrition care is not always recognised as a patient safety issue. This article explores the origins of the patient safety initiative and seeks to identify possible connections between nutrition care and patient safety. Examples of tools that can be used... -
Eating behaviour, eating attitude and body mass index of dietetic students versus non-dietetic majors: a South African perspective
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sm Kassier --- Discipline of Dietetics and Human Nutrition, Durban Fj Veldman --- Discipline of Dietetics and Human Nutrition, DurbanObjectives: The objective was to determine and compare the eating behaviour, eating attitude and body mass index (BMI) of dietetic students to those of non-dietetic majors. -
Scientometric assessment of selected R&D priority areas in South Africa: A comparison with other BRICS countries
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Xolani Makhoba --- Institute of Technological Innovation, Graduate School of Technology Management, Pretoria South Africa Anastassios Pouris --- Institute of Technological Innovation, Graduate School of Technology Management, Pretoria South AfricaA scientometric analysis of selected research priority areas in South Africa was done using the Web of Science database for the period 2002–2012. The performance of the country in the areas of biotechnology, energy, astronomy and palaeontology in terms of... -
Diabetes distress and related factors in South African adults with type 2 diabetes
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Samantha Ramkisson --- Department of Behavioural Medicine, South Africa Basil Joseph Pillay --- Department of Behavioural Medicine, South Africa Benn Sartorius --- Department of Public Health Medicine, South AfricaBackground: In South Africa, the prevalence rate of diabetes is 9.27%, with an estimated 2.6 million people living with the disease. Diabetes-related distress has been described as encompassing the patient’s concerns about the self-management of diabetes, perception of support, emotional... -
Effects of rooting media on root growth and morphology of Brassica rapa seedlings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Michael O Adu --- Department of Ecological Sciences, UK David O Yawson --- Department of Soil Science, School of Agriculture, College of Agriculture and Natural Sciences, Ghana Frederick A Armah --- Department of Environmental Science, School of Biological Science, College of Agriculture and Natural Sciences, Ghana Paul A Asare --- Department of Crop Science, School of Agriculture, College of Agriculture and Natural Resources, Ghana Malcolm J Bennett --- Plant and Crop Sciences Division, School of Biosciences, UK Martin R Broadley --- Plant and Crop Sciences Division, School of Biosciences, UK Philip J White --- Department of Ecological Sciences, UK Lionel X Dupuy --- Department of Ecological Sciences, UKRooting media used in current root phenotyping studies can have substantial effect. In this study, the effects of three different nutrient conducting papers (Black construction paper, Anchor blue germination paper and Kimpak paper) and soil-filled boxes on root growth and... -
South African indigenous fruits – Underutilized resource for boosting daily antioxidant intake among local indigent populations?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Daniela Amalia Kucich --- Department of Chemistry, South Africa Merrill Margaret Wicht --- Department of Chemistry, South AfricaConsuming more than seven portions of fruit and vegetables daily substantially lowers the risk of mortality from any cause, yet many South Africans living below the poverty line have a very low or even zero intake of fruit and vegetables... -
IPO market cycles and expansion curse: Evidence from Chinese IPO market
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Yonghong Jin --- Department of Finance, School of Business, China Jianbang Guo --- Department of Finance, School of Business, China Xiaozhou Zhou --- Department of Finance, School of Business, China Sai-Ping Li --- Institute of Physics, Academia Sinica, TaiwanThere are two theories on the relationship between primary and secondary markets for securities. The first states that the expansion of IPO financing leads to a decline in stock prices, i.e. an expansion curse effect. The other states that the... -
Tillage and crop rotation effects on carbon sequestration and aggregate stability in two contrasting soils at the Zanyokwe Irrigation Scheme, Eastern Cape province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Arnold N Njaimwe --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Pearson NS Mnkeni --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Cornelius Chiduza --- Department of Agronomy, Faculty of Science and Agriculture, South Africa Pardon Muchaonyerwa --- School of Agricultural, Earth and Environmental Sciences, South Africa Isaiah IC Wakindiki --- Department of Agronomy, Faculty of Science and Agriculture, South AfricaIntensive tillage and monocropping have adversely affected the quality of soils in South Africa through accelerated loss of soil organic matter. Two clay loam soils, a Bonheim at Burnshill and a Shortlands at Lenye, at the Zanyokwe Irrigation Scheme in... -
Macroinvertebrates as bioindicators of water quality in the Mkondoa River, Tanzania, in an agricultural area
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Shimba --- Department of Biotechnology and Bioinformatics, FE Jonah --- Department of Fisheries and Aquatic Sciences, GhanaThe suitability of using macroinvertebrates as bioindicators of stream water quality was tested in the Mkondoa River in an agricultural area at Kilosa, using the rapid bioassessment protocol. The family biotic index (FBI) showed marked variation in water quality along... -
Aspects of reproduction of the brown mussel Perna perna at the Iture rocky beach near Cape Coast, Ghana
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: EA Krampah --- Department of Fisheries and Aquatic Sciences, Ghana K Yankson --- Department of Fisheries and Aquatic Sciences, Ghana J Blay --- Department of Fisheries and Aquatic Sciences, GhanaAspects of the reproductive biology of the brown mussel Perna perna at the Iture rocky beach near Cape Coast, Ghana, were studied from September 2014 to August 2015. The current study was aimed at providing information useful for managing the... -
Effects of marine reserves on the reproductive biology and recruitment rates of commonly and rarely exploited limpets
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MDV Nakin --- Biological and Environmental Sciences Department, South Africa CD McQuaid --- Coastal Research Group, Department of Zoology and Entomology, South AfricaWe tested the effects of marine reserve status on the reproductive biology and recruitment rates of two commonly exploited (Helcion concolor, Scutellastra longicosta) and two rarely exploited (Cellana capensis, Scutellastra granularis) limpet species using two reserve and two non-reserve sites... -
Effect Of Replacing Fish Meal With Blood Meal On Chemical Composition Of Supplement For Nile Tilapia (Oreochromis Niloticus)
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: J. G. Kirimi --- State Department of Fisheries, Kenya L. M. Musalia --- Department of Animal Sciences, Kenya J. M. Munguti --- Kenya Marine and Fisheries Research Institute (KMFRI)-Sagana, KenyaThe objective of the work was to evaluate the effect on the nutrient content of replacing fish meal (FM) with blood meal (BM) in fish supplement. Three isonitrogenous diets (35% crude protein) were formulated using FM as the main source... -
Cortisol stress response and histopathological alteration index in Clarias gariepinus exposed to sublethal concentrations of Qua Iboe crude oil and rig wash
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JK Saliu --- Ecotoxicology Unit, Department of Zoology, Nigeria SA Oluberu --- Ecotoxicology Unit, Department of Zoology, Nigeria II Akpoke --- Ecotoxicology Unit, Department of Zoology, Nigeria UD Ukwa --- Ecotoxicology Unit, Department of Zoology, NigeriaThe histological effect on and stress response of post juvenile Clarias gariepinus exposed to Qua Iboe crude oil and rig wash were investigated. Fish weighing 60–90 g and measuring 16–18 cm were exposed for 7–28 days to 8.00 ml−1 Qua... -
Emergence response of sunflower (Helianthus annuus) cultivars to supra-optimal soil temperatures
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lize Henning --- Department of Soil, Crop and Climate Sciences, South Africa Gert Ceronio --- Department of Soil, Crop and Climate Sciences, South Africa André A Nel --- Agricultural Research Council–Grain Crops Institute, South AfricaSeedling emergence is a sensitive stage during sunflower (Helianthus annuus L.) establishment. Abiotic stresses, such as high soil temperatures (above 40 °C), can cause delayed emergence resulting in uneven stand and ultimately poor yields. Therefore, the emergence and early growth... -
Observation of the pulse oximeter trace to estimate systolic blood pressure during spinal anaesthesia for Caesarean section: the effect of body mass index
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: T Samuel --- Department of Anaesthesia and Perioperative Medicine, South Africa D van Dyk --- Department of Anaesthesia and Perioperative Medicine, South Africa CJ Lombard --- Biostatistics Unit, South Africa RA Dyer --- Department of Anaesthesia and Perioperative Medicine, South AfricaBackground: The estimation of systolic blood pressure by disappearance and reappearance of the pulse oximeter trace during cuff inflation and deflation was compared with non-invasive blood pressure (NIBP) measurement, across the range of body mass index (BMI), during spinal anaesthesia... -
Selection of drought-tolerant tef (Eragrostis tef) genotypes using drought tolerance indices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mizan Tesfay Abraha --- African Centre for Crop Improvement, South Africa Hussein A Shimelis --- African Centre for Crop Improvement, South Africa Mark D Laing --- African Centre for Crop Improvement, South Africa Kebebew Assefa --- Debre-Zeit Agricultural Research Centre, EthiopiaDrought stress is one of the major abiotic constraints affecting production and productivity of tef (Eragrostis tef). Genetic resources and selection methodologies are among the prerequisites to improve the efficiency of breeding for drought tolerance. The objectives of this study... -
Experimental comparison of selected pozzolanic materials
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: K. A. Olonade --- Department of Civil Engineering, Nigeria M. B. Jaji --- Department of Civil Engineering, Nigeria O. A. Adekitan --- Department of Civil Engineering, NigeriaDifferent pozzolanic materials are commonly used in concrete production with different properties. This paper compared the performance of metakaoline (MTK), bamboo leaf ash (BLA), pulverized fly ash (PFA) and corn cob ash (CCA), when used as partial replacement for cement... -
Engineering research profile of countries in the African Union
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Swapan Kumar Patra --- Business School, Tshwane University of Technology, South Africa Mammo Muchie --- DST/NRF SARChI Professor, South AfricaScholarly publication output of engineering research from the member countries of the African Union (AU) are mapped using scholarly publication data from the Scopus® database of Elsevier. The countries are ranked based on various parameters, for example; number of publications,... -
Incidence and pattern of tuberculosis treatment success rates in different levels of the human development index: a global perspective
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Salman Khazaei --- Department of Epidemiology, Iran Shahab Rezaeian --- Research Center for Environmental Determinants of Health (RCEDH), Iran Vali Baigi --- Department of Epidemiology and Biostatistics, Iran Mohammad Saatchi --- Department of Epidemiology and Biostatistics, Iran Leila Molaeipoor --- Department of Epidemiology, Iran Zaher Khazaei --- Social Determinants of Health Research Center, Iran Somayeh Khazaei --- Faculty of Paramedical Science, Department of Operating Room, Iran Owais Raza --- Department of Epidemiology and Biostatistics, IranBackground: Tuberculosis (TB) treatment success rate remains a public health challenge in many developed and developing countries. The correlation between the incidence and pattern of TB and the Human Development Index (HDI) has not been globally determined. This study aimed... -
A global assessment of Holistic Planned Grazing™ compared with season-long, continuous grazing: meta-analysis findings
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Heidi-Jayne Hawkins --- Department of Biological Sciences, South AfricaIt has been claimed that Holistic Planned Grazing™ (HPG), a type of rotational grazing, can increase productivity in rangelands and reverse climate change while doubling the stocking rate, mainly through the impact of densely bunched animals on primary production. Previous... -
Body weight and weight perception among African and Caribbean university students: Correlation with depression symptoms
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Supa Pengpid --- ASEAN Institute for Health Development, Thailand Karl Peltzer --- Department of Psychology, South AfricaThe aim of the study was to investigate the association between body weight, weight perception, and depressive symptoms in African and Caribbean university students. In a cross-sectional survey the total sample included 4 964 undergraduate university students (mean age 21.8,... -
Preliminary evaluation of seed and germination traits in cowpea (Vigna unguiculata) genotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Abe S Gerrano --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Willem S Jansen van Rensburg --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South Africa Patrick O Adebola --- Agricultural Research Council–Vegetable and Ornamental Plant Institute, South AfricaCowpea is a valuable crop for subsistence farmers in South Africa. Seed quantitative traits and germination parameters are important for good establishment of the crop, therefore the variation for these traits were determined for 44 cowpea genotypes. A field experiment... -
Water quality assessment of the Siluko River, southern Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: IP Oboh --- Department of Animal and Environmental Biology, Faculty of Life Sciences, Nigeria CS Agbala --- Department of Animal and Environmental Biology, Faculty of Life Sciences, NigeriaThe water quality of the Siluko River, Edo State, Nigeria was investigated from March to August 2015 to determine its suitability for drinking and usage for domestic purposes. Water samples collected from three stations were tested for thirteen physico-chemical parameters... -
Improving the performance of the EPT Index to accommodate multiple stressors in Afrotropical streams
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FO Masese --- Department of Fisheries and Aquatic Sciences, Kenya PO Raburu --- Department of Fisheries and Aquatic Sciences, KenyaThe EPT index (Ephemeroptera, Plecoptera and Trichoptera) may be skewed by the wide tolerance to multiple stressors of the Baetid, Caenid and Hydropsychid families, which affects the performance of the EPT index as an indicator of multiple stressors in aquatic... -
Growth and dynamic modulus of elasticity of Pinus patula × Pinus tecunumanii hybrids in Mpumalanga, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Phillip C Hongwane --- Komatiland Forests Research, South Africa R Glen Mitchell --- Forest Solutions Malaysia, Malaysia Arnulf Kanzler --- Sappi Forest Research, South Africa Steven D Verryn --- Creation Breeding Innovations, South Africa Paxie WC Chirwa --- Department of Plant and Soil Sciences, South AfricaField establishment of South Africa’s most important commercial pine species, Pinus patula, is severely hampered by the pitch canker fungus, Fusarium circinatum. Importantly, hybrids between P. patula and other pine species tolerant to the pitch canker fungus, such as P... -
Comparison of glycaemic indices of some local beans (Vigna unguiculata [Linn] Walp varieties) in Nigerians
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: OB Olopade --- Department of Medicine, Endocrinology, Diabetes & Metabolism, Nigeria IA Odeniyi --- Department of Medicine, Endocrinology, Diabetes & Metabolism, Nigeria SO Iwuala --- Department of Medicine, Endocrinology, Diabetes & Metabolism, Nigeria OO Kayode --- Department of Medicine, Endocrinology, Diabetes & Metabolism, Nigeria OA Fasanmade --- Department of Medicine, Endocrinology, Diabetes & Metabolism, Nigeria MO Ajala --- Department of Chemical Pathology, Nigeria PO Chimah --- Department of Dietetics, Nigeria AE Ohwovoriole --- Department of Medicine, Endocrinology, Diabetes & Metabolism, NigeriaBackground: Beans are recommended for their richness and for their salutary effect on blood glucose. Inter-species differences impact on blood glucose. What appeared unknown is whether varieties of beans of the same species (Vigna unguiculata [Linn] Walp) have differential effects... -
The effect of sevoflurane induction on the myocardial performance index in healthy individuals
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Aidan C Kingwill --- Department of Anaesthesia, School of Medicine, South Africa Johannes van der Westhuizen --- Department of Anaesthesia, School of Medicine, South Africa Edwin W Turton --- Department of Anaesthesia, School of Medicine, South AfricaBackground: The myocardial performance (Tei) index is a simple, reproducible and easily performed measure of cardiac performance. Its ease of use and proven clinical application make this an attractive measure perioperatively. For appropriate use of this index under sevoflurane anaesthesia,... -
Amaranth grain production as affected by watering regimes and day length in southern Mozambique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Jerónimo EMM Ribeiro --- Department of Agronomy, South Africa Petrus J Pieterse --- Department of Agronomy, South Africa Sebastião I Famba --- Faculty of Agronomy and Forestry Engineering, MozambiqueThe high nutritional value of amaranth grain makes it attractive for the diet of rural people living in dry semi-arid areas of southern Mozambique. A study was implemented with Amaranthus hybridus and A. tricolor in sandy soil aiming to assess... -
Household wealth and adoption of Integrated Striga Management (ISM) technologies in northern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: L. J. S. Baiyegunhi --- School of Agricultural, Earth and Environmental Sciences, Discipline of Agricultural Economics, South Africa M. B. Hassan --- School of Agricultural, Earth and Environmental Sciences, Discipline of Agricultural Economics, South AfricaAgricultural households in developing countries often are unable and unwilling to adopt new technologies due to the deterrents to adoption imposed by numerous socio-economic, institutional and ecological factors. However, economic theory predicts that relatively wealthy households have better ability to... -
Hospital-acquired malnutrition in children at a tertiary care hospital
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Del-Rossi Sean Quadros --- Department of Paediatrics and Child Health, Kenya. Rose Kamenwa --- Department of Paediatrics and Child Health, Kenya. Samuel Akech --- Department of Paediatrics and Child Health, Kenya. William M Macharia --- Department of Paediatrics and Child Health, Kenya.Objectives: This study sought to investigate the incidence and factors associated with hospital-acquired malnutrition in children. -
Sawn-timber and kraft pulp properties of Pinus elliottii × Pinus caribaea var. hondurensis and Pinus patula × Pinus tecunumanii hybrids and their parental species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: André Nel --- Shaw Research Centre, Sappi Forests Research, South Africa Francois S Malan --- Retired, South Africa Ron Braunstein --- Sappi Technology Centre, South Africa C Brand Wessels --- Department of Forest and Wood Science, South Africa Arnulf Kanzler --- Shaw Research Centre, Sappi Forests Research, South AfricaA study was undertaken to evaluate the quality of the timber produced by Pinus elliottii × Pinus caribaea var. hondurensis (PECH) and the Pinus patula × Pinus tecunumanii low elevation (PPTL) and high elevation (PPTH) hybrids and their parent species... -
Phytomass estimation using eMODIS NDVI and ground data in arid rangelands of Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Hamid Mahyou --- Centre Régional de la Recherche Agronomique d’Oujda, Morocco Bernard Tychon --- Department of Environmental Sciences and Management, Belgium Marie Lang --- Department of Environmental Sciences and Management, Belgium Riad Balaghi --- Centre Régional de la Recherche Agronomique de Meknès, MoroccoThe assessment of rangeland productivity in semi-extensively grazed arid rangelands is a prerequisite for livestock management in relation to sustainable use of pastoral resources. The objective of this study was to assess rangeland productivity based on normalised difference vegetation index... -
Index selection for growth and construction wood properties in Pinus elliottii open-pollinated families in southern China
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Shuainan Zhang --- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Zhejiang Provincial Key Laboratory of Tree Breeding, China Jingmin Jiang --- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Zhejiang Provincial Key Laboratory of Tree Breeding, China Qifu Luan --- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Zhejiang Provincial Key Laboratory of Tree Breeding, ChinaThe initial introduction of Pinus elliottii (PEE) to China occurred in the 1930s, and the planting of this conifer species has now attained close to 3 million ha in the subtropical zone of southern China. A large-scale genetic improvement program... -
Reproductive strategies of smooth-head catfish Clarias liocephalus (Boulenger, 1898), in the Rwizi-Rufuha wetland system, south-western Uganda
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: J Yatuha --- Biology Department, Uganda J Rutaisire --- National Agricultural Research Organization, Uganda L Chapman --- Department of Biology, Canada J Kang’ombe --- Bunda College of Agriculture, Malawi D Sikawa --- Bunda College of Agriculture, MalawiThe reproduction of the smooth-head catfish (Clarias liocephalus), a heavily exploited wetland fish in Uganda, in a data-deficient fishery, was studied from January to December 2011. Analyses were based on a sample of 854 fish specimens obtained from a chain... -
Concentrations and ecological risks of metals in surface sediments of some coastal creeks in the Niger Delta, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CMA Iwegbue --- Department of Chemistry, Nigeria OV Beecroft --- Department of Chemistry, Nigeria JE Ogala --- Department of Geology, Nigeria FE Egobueze --- Environment Department, Nigeria GO Tesi --- Department of Chemistry, Nigeria GE Nwajei --- Department of Chemistry, Nigeria BS Martincigh --- School of Chemistry and Physics, South AfricaThe concentrations of nine metals were measured by atomic absorption spectrophotometry in surface sediments of three coastal creeks, namely, the Ifie, Egbokodo and Ubeji creeks, in the Niger Delta of Nigeria, from August 2012 to January 2013. The aim of... -
Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ute Schmiedel --- Institute for Plant Science and Microbiology, Germany Jens Oldeland --- Institute for Plant Science and Microbiology, GermanyThe Succulent Karoo biome is a renowned centre of biodiversity and endemism in the arid winter rainfall region of South Africa that is threatened by climate change. On 20 permanently marked plots within a biodiversity observatory, species richness and cover... -
Maize responses to reduced tillage, different plant residue mulch and nitrogen fertiliser on granitic sandy soils of Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Walter Mupangwa --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Isaiah Nyagumbo --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Eleanor Mutsamba --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Blessing Mhlanga --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, Zimbabwe Jefias Mataruse --- International Maize and Wheat Improvement Centre (CIMMYT), Southern Africa Regional Office, ZimbabweMulching in smallholder conservation agriculture (CA) systems is constrained by lack of adequate crop residues. A three-year study assessed the effects of reduced tillage systems combined with different plant residue mulch and nitrogen (N) fertiliser on nitrogen uptake using the... -
Induction of anaesthesia with propofol according to the adjusted ideal body mass in obese and non-obese patients: an observational study
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: FJ Smith --- Department of Anaesthesiology, School of Medicine, South Africa FX Jurgens --- Department of Anaesthesiology, School of Medicine, South Africa JF Coetzee --- Department of Anaesthesiology and Critical Care, South Africa PJ Becker --- Department of Anaesthesiology, School of Medicine, South AfricaBackground: Obesity changes body composition including fat free mass (FFM), regarded as the “pharmacologically active mass”. Scaling drug doses to obese patients by total body mass (TBM) results in overdose. We aimed to determine the success rate of inducing anaesthesia... -
Improved parameters of Pinus greggii seedling growth and health after inoculation with ectomycorrhizal fungi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rebeca Casique Valdés --- Department of Horticulture, Mexico Rosalinda Mendoza Villarreal --- Department of Horticulture, Mexico Fernando Galindo García --- Department of Horticulture, Mexico Susana González Morales --- Department of Horticulture, Mexico Sergio Sanchez Peña --- Department of Parasitology, MexicoPinus greggii Engelm. ex Parl. is an endemic pine of Mexico with notorious adaptability to eroded, shallow and poor soils. It is widely used in reforestation programmes worldwide. The purpose of the present study is to develop an ectomycorrhizal fungi... -
Estimating evapotranspiration in semi-arid rangelands: connecting reference to actual evapotranspiration and the role of soil evaporation
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Onalenna Gwate --- Institute for Water Research, Rhodes University, South Africa Sukhmani K Mantel --- Institute for Water Research, Rhodes University, South Africa Andiswa Finca --- Agricultural Research Council–Animal Production Institute, South Africa Lesley A Gibson --- School of Engineering, UK Zahn Munch --- Department of Geography and Environmental Studies, South Africa Anthony R Palmer --- Institute for Water Research, Rhodes University, South AfricaIn a context of water scarcity, efforts to increase landscape production should focus on improving water productivity. This requires an appreciation of the various components of evapotranspiration (ET), including soil evaporation (Es) because the latter reflects ‘unproductive’ water loss. Both... -
Biomarkers, shock index and modified early warning score among older medical hospital inpatients in Nigeria
Item type: Journal Article • Journal: South African Family Practice • Authors: LA Adebusoye --- Chief Tony Anenih Geriatric Centre (CTAGC), Nigeria MO Owolabi --- Department of Medicine, College of Medicine, Nigeria A Ogunniyi --- Department of Medicine, College of Medicine, NigeriaBackground: Biomarkers, shock index and modified early warning score (MEWS) are of public health importance because identification and prompt attention to them have been found to reduce mortality among older patients on admission. -
Implications of Transforming Household Livelihoods through Villagization in Conserving Forest Resources in Southwest Ethiopia: A Case Study of Mengeshi District, Gambela Region
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Abera Aba --- Jimma University College of Agriculture and Veterinary Medicine, Ethiopia Kaba Urgessa --- Department of Natural Resources Management, Ethiopia Zerihun Kebebew --- Department of Natural Resources Management, EthiopiaVillagization brings scattered households together into a defined area with the aim of transforming living conditions through providing social and economic services. As the forest in Mengeshi district, southwest Ethiopia, has been destroyed through shifting cultivation, the study aims at... -
Effect of residue management and fertiliser application on the productivity of a Eucalyptus hybrid and Acacia mangium planted on sloping terrain in northern Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nguyen Van Bich --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Daniel Mendham --- CSIRO Land and Water, Australia Katherine J Evans --- Tasmanian Institute of Agriculture, University of Tasmania, Australia Tran Lam Dong --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Vo Dai Hai --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Hoang Van Thanh --- Silviculture Research Institute, Vietnamese Academy of Forest Sciences, Vietnam Caroline L Mohammed --- Tasmanian Institute of Agriculture, University of Tasmania, AustraliaForest plantation growers in Vietnam commonly burn residues after harvesting and often apply suboptimal amounts of nutrients during plantation establishment. We examined whether the retention of forest residue, and application of phosphorus fertiliser at higher rates, can increase rates of... -
Frost tolerance of various Pinus pure species and hybrids
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Fanelesibonge Mabaso --- Department of Forest and Wood Science, South Africa Hannél Ham --- Department of Forest and Wood Science, South Africa André Nel --- Sappi Forests Research, Shaw Research Centre, South AfricaPinus species are widely planted by the South African forestry industry and are utilised for pulp, paper and saw timber products. Historically, Pinus patula Schiede ex Schltdl. et Cham. was the most widely planted commercial species in the summer rainfall... -
First record of Labeo capensis (Smith, 1841) in the Crocodile River (West) system: another successful non-native freshwater fish introduction in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JH Erasmus --- Water Research Group, Unit for Environmental Sciences and Management, South Africa W Malherbe --- Water Research Group, Unit for Environmental Sciences and Management, South Africa R Gerber --- Water Research Group, Unit for Environmental Sciences and Management, South Africa OLF Weyl --- DST/NRF Research Chair in Inland Fisheries and Freshwater Ecology, South Africa B Sures --- Aquatic Ecology and Centre for Water and Environmental Research, Germany V Wepener --- Water Research Group, Unit for Environmental Sciences and Management, South Africa NJ Smit --- Water Research Group, Unit for Environmental Sciences and Management, South AfricaSouth Africa is one of six global fish invasion hotspots and as a result, non-native fishes are common components of the fish assemblages in all of the major river systems. The rate of establishment for introduced fish into South African... -
A new sentiment index for the Islamic stock market
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Muhammad Asif Khan --- Faculty of Business and Accountancy, Malaysia Rubi Ahmad --- Faculty of Business and Accountancy, Malaysia Anna Azmi --- Faculty of Business and Accountancy, Malaysia Muhammad Akbar --- Birmingham City Business School, UKThis study attempts to examine the predictability of Google search volume (GSV) and to construct an appropriate investor sentiment index for Islamic stock markets for seven United States (US) Islamic stock indices. Using principal component analysis, we construct an appropriate... -
Cranial variation in common dolphins Delphinus spp. off South Africa, with the inclusion of information from the holotype of Delphinus capensis
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SG Ngqulana --- Department of Zoology, South Africa S Plön --- Earth Stewardship Science Research Institute – Africa Earth Observatory Network, South Africa A Galatius --- Department of Bioscience, Denmark P Pistorius --- Department of Zoology, South Africa GJG Hofmeyr --- Department of Zoology, South AfricaThe common dolphins (genus Delphinus) are widely distributed in all temperate and tropical oceans. Over this wide geographical distribution they show considerable range in morphological variation, which has led to descriptions of several species in the genus. Until recently, only... -
Localised intermittent upwelling intensity has increased along South Africa’s south coast due to El Niño–Southern Oscillation phase state
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MI Duncan --- Department of Ichthyology and Fisheries Science, South Africa NC James --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa AE Bates --- Department of Ocean Sciences, Canada WS Goschen --- Institute for Coastal and Marine Research, Ocean Sciences Campus, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe El Niño–Southern Oscillation (ENSO) phase state is reported to drive interannual variability in sea temperatures along South Africa’s south coast through its influence on wind-induced upwelling processes. Whether ENSO drives the intensity of localised, abrupt, intermittent upwelling is less... -
Vegetation dynamics in the face of a major land-use change: a 30-year case study from semi-arid South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Olli Hyvärinen --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South Africa M Timm Hoffman --- Plant Conservation Unit, Department of Biological Sciences, South Africa Chevonne Reynolds --- FitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, South AfricaAlthough wildlife production is widely considered beneficial for semi-arid environments, few studies have reported on the long-term environmental effects of converting from livestock production to game ranching. Asante Sana Game Reserve in South Africa was stocked with domestic livestock for... -
Diet of catfish Clarias buthupogon Sauvage, 1879 (Clariidae) in two rivers in the Yoko Reserve, Tshopo Province, Democratic Republic of the Congo
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RB Mahamba --- Department of Phytotechnics, Democratic Republic of the Congo JN Ndjaki --- Department of Hydrobiology, Democratic Republic of the Congo AB Kankonda --- Department of Hydrobiology, Democratic Republic of the Congo J-C Micha --- Environmental Biology Research Unit (URBE), BelgiumThe diet of the catfish, Clarias buthupogon, was studied in two forest rivers in the Yoko Reserve, the Yoko and Biaro Rivers, from September 2008 to August 2009. Gill nets, long lines and traditional traps were used to catch the... -
Diet of Glossogobius callidus (Teleostei: Gobiidae) in freshwater impoundments in the Sundays River Valley of the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L Mofu --- Department of Ichthyology and Fisheries Science, South Africa DJ Woodford --- Centre for Invasion Biology, School of Animal, Plant and Environmental Sciences, South Africa RJ Wasserman --- South African Institute for Aquatic Biodiversity, South Africa T Dalu --- South African Institute for Aquatic Biodiversity, South Africa OLF Weyl --- Department of Ichthyology and Fisheries Science, South AfricaDespite the high abundance of the gobiid fish Glossogobius callidus in many freshwater ecosystems in South Africa, very few studies have assessed the biology and ecology of the species. Here, we investigated the diet of G. callidus populations sourced from... -
FTSE/JSE Index migration: Testing for a tradeable index effect
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Nico Katzke --- Department of Economics, South Africa Charlotte van Tiddens --- Prescient Securities,This paper studies whether periodic changes to the constituents in the Swix Top 40 Index leads to price distortions at quarterly rebalancing. Following large and predictable spikes in trade of affected stocks around rebalancing, the natural question is whether this... -
Preliminary observations of the reproductive biology of the Frenchman seabream Polysteganus baissaci (Sparidae) from Mauritius
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Caussy --- Department of Biosciences and Ocean Studies, Faculty of Science, Mauritius C Appadoo --- Department of Biosciences and Ocean Studies, Faculty of Science, Mauritius WHH Sauer --- Department of Ichthyology and Fisheries Science, South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe Frenchman seabream Polysteganus baissaci is an important commercial fish species found on the slopes of the fishing banks of the exclusive economic zone of Mauritius. Exploitation of this species started in 2007, and it is targeted using hydraulic reels... -
A comparison between the morphological and molecular approach to identify the benthic diatom community in the St Lucia Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Nunes --- Botany Department and Institute for Coastal and Marine Research, South Africa JB Adams --- Botany Department and Institute for Coastal and Marine Research, South Africa S Van Aswegen --- Department of Biochemistry and Microbiology, South Africa GF Matcher --- Department of Biochemistry and Microbiology, South AfricaThe use of diatoms as bioindicators to detect human-induced change is a globally accepted monitoring tool. DNA metabarcoding is an effective complementary tool to standard microscopic methods for species identification, providing reliable and timeous diatom assessments in a range of... -
Diversity analysis of mungbean (Vigna radiata) germplasm using a semi-graphical technique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Hafiz Basheer Ahmad --- Oilseed Research Institute, Ayub Agricultural Research Institute, Pakistan Salsabeel Rauf --- Oilseed Research Institute, Ayub Agricultural Research Institute, Pakistan Waqas Shafqat Chattha --- Department of Plant Breeding and Genetics, Pakistan Busharat Hussain --- Pulses Research Institute, Ayub Agricultural Research Institute, Pakistan Iqtidar Hussain --- Department of Agronomy, Pakistan Irfan Rasool --- Pulses Research Institute, Ayub Agricultural Research Institute, PakistanGrain legumes such as mungbean are often co-cultivated with cereals. The genetic diversity among 84 mungbean genotypes was studied using metroglyph and principal component analysis. Data were recorded for days to flowering and maturity, plant height, pods per plant, clusters... -
Bucking the trend: the African Black Oystercatcher as a recent conservation success story
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mark Brown --- School of Life Sciences, South Africa Brittany Arendse --- Nature’s Valley Trust, Nature’s Valley, South Africa Bruno Mels --- Nature’s Valley Trust, Nature’s Valley, South Africa Alan TK Lee --- School of Life Sciences, South AfricaThe African Black Oystercatcher Haematopus moquini is a charismatic, southern African near-endemic, wader species, that is often seen as a flagship species for coastal bird conservation, as it was recently down-listed regionally to Least Concern on the IUCN Red List... -
Association between dietary adherence, anthropometric measurements and blood pressure in an urban black population, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nasheetah Solomons --- Department of Dietetics and Nutrition, South Africa H Salome Kruger --- Centre of Excellence for Nutrition, South Africa Thandi Puoane --- School of Public Health, South AfricaObjectives: The aim was to determine participants’ dietary adherence by calculating a diet adherence score based on the Dietary Approaches to Stop Hypertension (DASH)-style diet; (2) to determine if there was an association between dietary adherence score, anthropometric measurements (waist... -
Recent droughts in the Kruger National Park as reflected in the extreme climate index
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johan Malherbe --- , South Africa Izak PJ Smit --- , South Africa Konrad J Wessels --- , United States Philip J Beukes --- , South AfricaAssociated with the 2015/2016 El Niño, extreme drought occurred over the Lowveld of South Africa. The area includes the Kruger National Park (KNP). Significant die-offs of a mega herbivore species occurred, corroborated by census data in KNP. The drought situation... -
Interactive effects of pH and temperature on native and alien mussels from the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MP Emanuel --- Marine Research Institute, Department of Biological Sciences, South Africa D Pillay --- Marine Research Institute, Department of Biological Sciences, South Africa M van der Merwe --- Centre for Higher Education Development, South Africa GM Branch --- Marine Research Institute, Department of Biological Sciences, South AfricaGlobal warming and ocean acidification influence marine calcifying organisms, particularly those with external shells. Among these, mussels may compensate for environmental changes by phenotypic plasticity, but this may entail trade-offs between shell deposition, growth and reproduction. We assessed main and... -
The developmental growth and quality assessment of five selected cultivars of baby spinach grown in Gauteng province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nature M Masufi --- Department of Agriculture and Animal Health, South Africa Ambani R Mudau --- Department of Life and Consumer Science, South Africa Hintsa T Araya --- ARC-Roodeplaat, Vegetable and Ornamental Plants, South Africa Fhatuwani N Mudau --- Department of Agriculture and Animal Health, South AfricaBaby spinach is a relatively new crop in South Africa that has commercial significance in retail stores. Currently, seed companies have developed varieties that have not been evaluated locally. Thus, the aim of this study was to investigate the growth,... -
Food security status and its determinants in pastoral and agro-pastoral districts of Afar regional state, Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Shishay Teklay Kahsay --- , Ethiopia Gebrehaweria Kidane Reda --- , Ethiopia Alem Mezgebo Hailu --- , EthiopiaFood insecurity is a prime difficulty in Ethiopia. Food security policies and intervention mechanisms require empirical evidence on factors related to enhancement of food security. This study analyzed the determinants of households’ food security status in pastoral and agro-pastoral districts... -
Expected option returns during the post-GFC era
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Cheng Yan --- , PRC Xiaoli Wu --- , UKWe investigate whether the option implied volatility predicts the future realised volatility of the underlying securities and whether volatility risk factors exploited from options are pricing factors. Our sample includes six popular stock indices such as the S&P 500 and... -
Effects of untreated industrial effluents on water quality and benthic macroinvertebrate assemblages of Lake Hawassa and its tributaries, Southern Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ST Mereta --- , Ethiopia A Ambelu --- , Ethiopia A Ermias --- , Ethiopia Y Abdie --- , Ethiopia M Moges --- , Ethiopia A Haddis --- , Ethiopia D Hailu --- , Ethiopia H Beyene --- , Ethiopia B Kebede --- , Ethiopia WL Mulat --- , United StatesThe present study investigates the impacts of industrial effluents on the macroinvertebrate assemblages and water quality of the Lake Hawassa watershed. The water quality and macroinvertebrate assemblages were assessed at 40 sampling sites. The chemical and ecological water quality was... -
Status and population structures of three anthelmintic tree species along climatic gradient in Benin and the implications for conservation
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Géorcelin G Alowanou --- , Bénin Thierry D Houéhanou --- , Bénin Sylvanus Mensah --- , Bénin Bénoit K Alissou --- , Bénin Carlos C Ahoyo --- , Bénin Rauldin S Akpako --- , Bénin Faroukou Wabi --- , Bénin Marcel RB Houinato --- , Bénin Sylvie M Hounzangbé-Adoté --- , BéninSmallholder farmers make intensive use of anthelmintic plant species in the traditional treatment of animal parasitic infections. As a result, populations of these plant species are exposed to increased disturbances such as plant harvesting, threatening their stability. Information on population... -
Water quality of the volcanic crater lake, Lake Barombi Kotto, in Cameroon
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: ME Awo --- , Cameroon BA Fonge --- , Cameroon PT Tabot --- , Cameroon JTK Akoachere --- , CameroonCameroon is endowed with many freshwater lakes and rivers but, because of increasing anthropogenic activities, most of these water bodies are gradually being degraded. Lake Barombi Kotto is one of the volcanic crater lakes in Cameroon that serves as a... -
River water quality modelling and simulation based on Markov Chain Monte Carlo computation and Bayesian inference model
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mrunmayee Manjari Sahoo --- , India Kanhu Charan Patra --- , Rourkela, IndiaHierarchical Bayesian methods are experiencing increased use for probabilistic ecological modelling. Influence of water quality indicators in the river water are studied. Bayesian inference through Markov Chain Monte Carlo (MCMC) algorithm is used as the basic model to assess the... -
Tracking error vs tracking difference: Does it matter?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Ailie Charteris --- , South Africa Kerry McCullough --- , South AfricaFund fact sheets are intended to provide investors with information necessary to make investment decisions. For passive funds, the inclusion of cumulative returns for the fund and benchmark enable investors to measure the fund’s tracking performance using tracking difference. However,... -
Differences in soil microbial communities and enzyme activity due to the application of bioslurry under cultivation
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Motiki M Mofokeng --- , South Africa Johan Habig --- , South Africa Stephen O. Amoo --- , South Africa Christian P du Plooy --- , South Africa Phatu W Mashela --- , South Africa Mokhele E Moeletsi --- , South Africa Sonja Venter --- , South Africa Hintsa T Araya --- , South AfricaSoil micro-organisms influence soil ecosystem processes and properties. Their influence can be modified by cultivation practices, which affect their interaction with cultivated plants as well as soil physical and chemical properties. The study investigated differences in soil microbial activities between... -
Consumer sentiment and time-varying betas: Testing the validity of the consumption CAPM on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Javier Rojo-Suárez --- , Spain Ana Belén Alonso-Conde --- , SpainWe test both the conditional and unconditional versions of the consumption capital asset pricing model (CCAPM) on the Johannesburg Stock Exchange, for the period 1988–2018, and compare its performance with that of the CAPM and the Fama-French three- and five-factor... -
Estimating effects of information and communication technology (ICT) on the productivity of manufacturing industries in South Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mapula Hildah Lefophane --- , South Africa Mmatlou Kalaba --- , South AfricaThis paper serves to examine whether the growth in labour productivity (LP) in South Africa’s manufacturing sector, following policy reforms after 1994, can be attributed to ICT use. To achieve this, we examine the link between ICT intensity and LP... -
Size at maturity, maturity stages and sex ratio of tigerfish Hydrocynus vittatus Castelnau, 1861 in Lake Kariba, Zimbabwe: assessing the influence of decades of fisheries exploitation
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Terence Magqina --- , Zimbabwe Tatenda Dalu --- , South Africa Lindah Mhlanga --- , Zimbabwe Tamuka Nhiwatiwa --- , ZimbabweSize at maturity, sex ratio and maturity stages are key population parameters in fisheries management of exploited stocks because they influence survival of fish populations. The decline in Hydrocynus vittatus catches during the tigerfish competition and along the shoreline of... -
Risk of investing in volatility products: A regime-switching approach
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Leon Li --- , New ZealandVolatility indexes provide a tool for investors to speculate and trade on market sentiment regarding future volatility. The risk of trading on volatility indexes can be measured by their second moments, namely, variance and correlation. This study considers the four... -
The effect of fishmeal replacement with terrestrial protein sources on growth, body condition and intestinal microbiota of juvenile dusky kob Argyrosomus japonicus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CLW Jones --- , South Africa A Nel --- , South Africa A Adesola --- , South Africa T Shipton --- , South Africa H Kaiser --- , South AfricaA balanced combination of protein sources to partially replace fishmeal in the diets of cultured carnivorous fish can promote optimal fish health and production performance. In the present study, the growth, body condition and gut microbiota of juvenile dusky kob... -
Models for predicting slenderness coefficient from stump diameter for Tectona grandis stands in south-western Nigeria
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Onyekachi Chukwu --- , NigeriaIllegal logging has continued to be a major cause of depletion of the tropical forests in developing countries. However, empirical means of estimating the growth characteristics of a removed tree, which will facilitate the conviction of illegal loggers in judicial... -
Anthropogenic food availability and body mass maintenance in urban Red-winged Starlings Onychognathus morio
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Taylyn C Risi --- , South Africa Petra Sumasgutner --- , South Africa Susan J Cunningham --- , South AfricaAnthropogenic food availability is influenced by short-term fluctuations in human presence, especially in core urban areas. Few studies have explored responses to such day-to-week fluctuations, specifically on body mass and body condition of urban birds. Here, we investigated non-breeding body... -
Development of a Water Quality Assessment Index for the Chania River, Kenya
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: GK Robert --- , Kenya CN Onyari --- , Kenya JG Mbaka --- , KenyaHuman-related activities are known to have deleterious effects on the water quality of aquatic ecosystems, but there is limited information on the impact of these on rivers in tropical regions, such as the Chania River in Kenya. The Chania River... -
Diversity of macrophytes in relation to environmental conditions in wetlands along the lower part of the Gilgel Abay River catchment in Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe environmental conditions in wetlands affect the diversity, composition, and distribution of their macrophyte communities. This study investigated the diversity of macrophytes as related to environmental conditions in wetlands of the lower part of Gilgel Abay River catchment in Ethiopia... -
Risk assessment of polycyclic aromatic hydrocarbons in the sediments of the Ekulu River in Enugu State in Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Uzochukwu C Ugochukwu --- , Nigeria Onyechi H Onuora --- , Nigeria Leonard Kurumeh --- , Nigeria Uchenna I Mbakwe --- , Nigeria Obiageli J Okolo --- , Nigeria Amaka L Onuorah --- , NigeriaThe human health and ecological risks resulting from exposure to polycyclic aromatic hydrocarbons (PAHs) in the Ekulu River sediments were estimated in this study. The Ekulu River receives pollutants potentially containing polycyclic aromatic hydrocarbons (PAHs) from runoff from automotive workshops... -
Characterisation of Eucalyptus rhizospheric communities using fatty acid methyl ester (FAME) profile analysis
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Chimdi Nwigwe --- , South Africa Annabel Fossey --- , South Africa Olga de Smidt --- , South AfricaHybrid vigour is exploited in Eucalyptus forestry through the production of interspecific hybrids. Hybrids are deployed via cuttings that often suffer from poor rooting. Rhizospheric microorganisms have been associated with rooting enhancement, therefore knowledge of the diversity of microorganism communities,... -
First report of glyphosate and paraquat resistance in two Plantago biotypes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Vhuthu Ndou --- , South Africa Frederick Eksteen --- , Ethel Phiri --- , South Africa Petrus J Pieterse --- , South AfricaResistance to glyphosate in plantago (Plantago lanceolata L.), a serious weed in South Africa, was confirmed in 2003. More recently, a plantago biotype that is putatively resistant to both glyphosate and paraquat was reported. Seeds from a putatively susceptible (S)... -
Smallholder wheat farmers’ commercialization level and its determinants in northwestern Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yonnas Addis Mihretie --- , EthiopiaThis study analyzes the commercial engagement of smallholder farmers in wheat commercialization at the farm level and the factors affecting this. A stratified three stage sampling technique was used to collect data from 195 smallholder wheat farmers. Descriptive and Tobit... -
Changes in vegetation structure, aboveground biomass and soil quality in response to traditional grazing land management practices in the central highlands of Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Teklu Wegi --- , Ethiopia Abubeker Hassen --- , South Africa Melkamu Bezabih --- , Ethiopia Adugna Tolera --- , EthiopiaDespite shrinking pastureland in the central highlands of Ethiopia, as a result of cropping, there has been little detailed work to evaluate effects of traditional grazing land management practices on vegetation and soil attributes. This study aimed to quantify vegetation... -
Investor sentiment and market dynamics: Evidence from index futures markets
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Heejin Yang --- , KoreaThis study presents an investor sentiment proxy with a greater explanatory power in determining price changes in the Korean futures market and examines the effect of investor sentiment on futures price changes. We also consider how investor-trading behaviour affects the... -
Rural infrastructure and production efficiency of food crop farmers: Implication for rural development in Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abeeb Babatunde Omotoso --- , Nigeria Saidat Adebola Daud --- , Nigeria Luke Okojie --- , Nigeria Abiodun Olusola Omotayo --- , South AfricaThis study investigated the impact of rural infrastructure on production efficiency of food crop rural farmers in Ogun State, Nigeria. A total of 160 farming households from 20 communities in Abeokuta and Ilaro in Ogun State Agricultural Development Programme (OGADEP)... -
Effect of fibre and vessel biometry on wood combustibility of native Miombo tree species
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jonas Massuque --- , Brazil Kelly Iapuque Rodrigues de Sousa --- , Brazil Paulo Fernando Trugilho --- , BrazilFibres and vessels represent the largest proportion of anatomical elements in hardwood tree species. They exert significant effects on various properties of the wood, which, consequently, have several implications for the use of the wood. However, the effect of these... -
Use of biological and water quality indices to evaluate conditions of the Upper uMngeni Catchment, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: R van Deventer --- , South Africa CD Morris --- , South Africa TR Hill --- , South Africa NA Rivers-Moore --- , South AfricaUrban and agricultural land uses have the potential to severely compromise the quality of impoundments, if ineffectively managed and operated. A case in point is the upper uMngeni Catchment, including Midmar Dam, which is integral to the freshwater supply infrastructure... -
Macroinvertebrate community structure and diversity in relation to environmental factors in wetlands of the lower Gilgel Abay River catchment, Ethiopia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Habtamu Getnet --- , Ethiopia Seyoum Mengistou --- , Ethiopia Bikila Warkineh --- , EthiopiaThe influence of environmental factors on the diversity of macroinvertebrates was studied in the wetlands of the Gilgel Abay River (GAR) catchment in Ethiopia. The study was done between September 2017 and March 2018, encompassing both wet and dry seasons... -
Assessing fish community response to water quality and habitat stressors in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Wesley Evans --- , South Africa Colleen T Downs --- , South Africa Matthew J Burnett --- , South Africa Gordon C O’Brien --- , South AfricaThe degradation of freshwater ecosystems can be attributed to stressors associated with the increased demand for water and other aquatic resources. Freshwater ecosystems face such challenges in supporting agriculture, industry, and high-density urban areas in KwaZulu-Natal (KZN) province, South Africa... -
Assessing alternatives for growth and yield modelling in eucalypt stands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Thaynara Reis --- , Simone Silva --- , Ivaldo Tavares Junior --- , Rodrigo Leite --- , Mariana Taquetti --- , Kemely Atanazio --- , Leonardo Fardin --- , Jovane Cruz --- , Helio Leite --- ,Growth and yield estimates are extremely important for forest stand management. The application of simple models is often useful, as it allows the use of plots with few or a single measurement. The objective of this study was to evaluate... -
Impact of preceding crop sequences on wheat growth and development under conservation agriculture in the eastern Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: MH Visser --- , South Africa A Barnard --- , South Africa CC du Preez --- , South AfricaConservation agriculture (CA) is advocated to promote sustainable cropping. Little is known about the impact of preceding crop sequences on the growth and development of dryland wheat under CA in the eastern Free State Province of South Africa. In a... -
The asymmetric relationship between volatility index and volatility-of-volatility index
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Adian McFarlane --- , Ontario Canada Anupam Das --- , Canada Young Cheol Jung --- , CanadaWe use the nonlinear autoregressive distributed lag model to assess the asymmetric relationship between the Chicago Board Options Exchange’s volatility index (VIX) and volatility-of-volatility index (VVIX) over the period January 2007 to March 2020. To control for potentially confounding factors,... -
Unlocking the commercialization potentials of Moringa oleifera production in Southwestern Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: T. O. Ojo --- , Nigeria A. A. Adetoro --- , Pietermaritzburg, South Africa A. A. Ogundeji --- , South Africa J. A. Belle --- , South Africa M. S. C. Ngidi --- , Pietermaritzburg, South AfricaDespite the importance of Moringa oleifera tree for food security at the smallholder farmers’ level, there is no consolidated socioeconomic information about the crop such as its contribution to household food security and income, and its production potential, commercialization and... -
Contribution of ankle-brachial index measurement in screening for arteriopathy obliterans of the lower limbs in type 2 diabetics
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Sitraka Angelo Raharinavalona --- , Madagascar Rija Eric Raherison --- , Madagascar Thierry Razanamparany --- , Madagascar Dally Rasoaniana --- , Madagascar Radonirina Lazasoa Andrianasolo --- , Madagascar Andrinirina Dave Patrick Rakotomalala --- , Madagascar -
Assessment of rice threshing technology characteristics for enhanced rice sector development in Senegal
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Philomena Chioma-Akalugo Ogwuike --- Federal University of Agriculture Abeokuta, Nigeria Aminou Arouna --- Africa Rice Center (AfricaRice), Cote d’Ivoire Clinton Obinna Ogwuike --- Centre for the Study of the Economies of Africa (CSEA), NigeriaUnderstanding the technology characteristics desirable to farmers to increase the adoption of improved technologies remains a high-priority research issue in sub-Saharan Africa (SSA). The study aimed to quantify farmers’ demand and assessment of the characteristics of rice threshing technologies to... -
Effect of nutrition education on nutritional status and serum zinc level of HIV and AIDS clients: implication for care in resource-limited settings
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ifeyinwa Ezenwosu --- , Nigeria Osita Ezenwosu --- , Nigeria Chinyere Mbachu --- , Nigeria Ijeoma Itanyi --- , Nigeria Emmanuel Aguwa --- , NigeriaBackground: People living with HIV or AIDS in resource-limited settings are faced with challenges in their nutrition and micronutrient levels. This study aimed to determine the effect of nutrition education on the nutrition status and serum zinc level of HIV... -
Maturity length, fecundity and spawning season of Atlantic chub mackerel Scomber colias in the coastal waters of Ghana (west-central Gulf of Guinea)
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JE Kassah --- University of Cape Coast, Ghana J Blay --- Centre for Coastal Management (Africa Centre of Excellence in Coastal Resilience), University of Cape Coast, Ghana I Okyere --- University of Cape Coast, Ghana N Lazar --- University of Rhode Island, United StatesAspects of the reproductive biology of Atlantic chub mackerel Scomber colias are reported here based on data from random samples of artisanal fish landings from Ghana. The specimens were between 13.7 cm and 40.7 cm total length (TL), and both... -
The asymmetric effect of COVID-19 government interventions on global stock markets: New evidence from QARDL and threshold regression approaches
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Mohammad Abdullah --- , Malaysia G. M. Wali Ullah --- , Australia Mohammad Ashraful Ferdous Chowdhury --- , Saudi ArabiaWe examine the asymmetric effect of COVID-19 government interventions on global stock markets using a sample of 61 countries over the period of January 2020 to December 2021, applying Quantile ARDL (QARDL) and panel threshold regressions. The QARDL results show... -
Habitat selection and foraging preference of the endangered addax (Addax nasomaculatus) in a fenced wildlife reserve within its historic range: insights for supporting effective reintroduction
Item type: Journal Article • Journal: African Zoology • Authors: Mohsen Chammem --- , Tunisia Hicham Seri --- , Tunisia Rita Bastos --- , Portugal Mário Santos --- , Portugal Joana Vicente --- , Portugal Touhami Khorchani --- , Tunisia João Alexandre Cabral --- , PortugalReintroduction of species should be based on ecological knowledge, which is fundamental to enhancing the probability of success, but also in predicting the response to future changing landscapes. The addax (Addax nasomaculatus), an endangered antelope whose ecology is mostly unknown,... -
Comparison of oxidative stress biomarkers in Oreochromis mossambicus in minimally and highly disturbed aquatic environments in the Matabeleland region, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Z Makuvara --- , Zimbabwe J Marumure --- , Zimbabwe L Chapungu --- , Zimbabwe J Machingura --- , South Africa AH Siwela --- , ZimbabweOwing to their ability to provide a functional measure of organismal response to chemical stressors, oxidative biomarkers are useful in ecotoxicological studies to assess disturbance in aquatic environments. This study assessed the use of oxidative stress biomarkers in Oreochromis mossambicus... -
Association between anthropometry and cardiovascular risk in patients attending a diabetic clinic
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Kylie Divashnee Konar --- Phoenix Community Health Centre, South Africa Somasundram Pillay --- Nelson R Mandela School of Clinical Medicine, University of KwaZulu-Natal, South Africa -
Assessment of water quality for suitability and human health risk: a study of the Owan River, Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Ijeoma Patience Oboh --- University of Benin, NigeriaSuitability assessment of water bodies for human consumption and its implication on human health is critical to water resources utilisation and sustainable development. This study investigated the water quality of the Owan River and the potential health risk to users... -
Dominant tree selection for height estimation and its impact on site classification for African mahogany stands
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Matheus Oliveira Teixeira --- Federal University of Piauí, Brazil Andressa Ribeiro --- Federal University of Piauí, Brazil Gabriel William Dias Ferreira --- Colorado State University, USA Maurício Sangiogo --- , Brazil Antonio Carlos Ferraz Filho --- Federal University of Piauí, BrazilAfrican mahogany plantations are increasing in Brazil, especially those planted with the species Khaya grandifoliola C. DC. Despite the interest in establishing plantations, there is a lack of studies in management practices for the genus. This makes it difficult to... -
Plantation water productivity (PWPWOOD) and not water-use efficiency (WUE) as the measure of commercial plantation yield improvement: a review
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Nkosinathi D Kaptein --- University of KwaZulu-Natal, South Africa Alistair D Clulow --- University of KwaZulu-Natal, South Africa Michele Toucher --- University of KwaZulu-Natal, South Africa Colin S Everson --- University of KwaZulu-Natal, South Africa Steven B Dovey --- Shaw Research Institute, South Africa Ilaria Germishuizen --- Institute for Commercial Forestry Research, South AfricaGlobal demand for forest products is ever-increasing, creating competition for water between downstream water users and commercial forest producers. Tree production should therefore aim at the effective use of water by producing maximum tree biomass from water used with the... -
The relationships between socioeconomic status, dietary knowledge and patterns, and physical activity with adiposity in urban South African women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Gudani Mukoma --- University of the Witwatersrand, South Africa Stephanie V Wrottesley --- University of the Witwatersrand, South Africa Juliana Kagura --- University of the Witwatersrand, South Africa Tolu Oni --- University of Cambridge, United Kingdom Lisa Micklesfield --- University of the Witwatersrand, South Africa Shane A Norris --- University of the Witwatersrand, South Africa -
Heavy episodic alcohol use among adults: Prevalence and correlates in Central African Republic
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- University of the Free State, South AfricaHeavy episodic drinking (HED) is associated with negative health consequences. The goal of the study was to assess HED among the general adult population in Central African Republic (CAR). In a cross-sectional survey in CAR (Bangui city and Ombella M’Poko... -
Water quality profile and metal pollution indices of the main stream of the Nile River in Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Manar M Hussein --- National Institute of Oceanography and Fisheries (NIOF), Egypt Mohamed E Goher --- National Institute of Oceanography and Fisheries (NIOF), Egypt Ahmed H Mangood --- Menofia University, Egypt Ibrahim E Mousa --- University of Sadat City, EgyptThe lower Nile River is a vital drinking and irrigation water source in Egypt. Human activities adjacent to rivers deteriorate the quality of such water resources. The water quality profiles of 23 sites along the Nile were calculated in accordance... -
The ecology of coastal wetland ponds created by diamond mining in southern Namibia. 3. Fish
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maritz --- University of Cape Town, South Africa CG Attwood --- University of Cape Town, South Africa D Pillay --- University of Cape Town, South Africa GM Branch --- University of Cape Town, South AfricaDiamond mining in southern Namibia creates seawalls that hold the ocean at bay, yet seawater overwashes or seeps through to fill landward excavated areas, forming numerous coastal ponds that reach 380 000 m2. These ponds span ages of 1–40 years,... -
On common index divisor and monogenity of certain number fields defined by trinomials X 6 + AX + B
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lhoussain El Fadil --- Sidi mohamed ben Abdellah University, MoroccoFor a number field K defined by a trinomial F (x) = x 6 + ax + b ∈ ℤ[x], Jakhar and Kumar gave some necessary conditions on a and b, which guarantee the non-monogenity of K [25]. In this... -
On the index divisors and monogenity of number fields defined by x 5 + ax 3 + b
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Lhoussain El Fadil --- Sidi Mohamed Ben Abdellah University, MoroccoThe main goal of this paper is to provide a complete answer to the Problem 22 of Narkiewicz[24] for any quintic number field K generated by a complex root α of a monic irreducible trinomial F(x) = x 5 +... -
Magnesium and zinc fertilisation improves rice yield and yield component responses to nitrogen, phosphorus, and potassium
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Firmin N Anago --- University of Abomey-Calavi, Benin Emile C Agbangba --- University of Abomey-Calavi, Benin Brice C T Oussou --- National Institute of Agronomic Research of Benin, Benin Gustave D Dagbénonbakin --- National Institute of Agronomic Research of Benin, Benin Lucien G Amadji --- University of Abomey-Calavi, BeninThe aim of this study was to assess the effects of magnesium (Mg) and zinc (Zn) on the response of rice to nitrogen (N), phosphorus (P), and potassium (K) application. Two sets of field experiments were carried out in Benin... -
On ωs-balanced semitopological groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Vikesh Kumar --- University of Delhi, India Brij Kishore Tyagi --- Atma Ram Sanatan Dharma College, University of Delhi, IndiaIn this paper we introduce the notion of ωs-balanced semitopological groups. We show that a regular (Hausdorff, T 1) semitopological group G admits a homeomorphic embedding as a subgroup into a product of regular (Hausdorff, T 1) semitopological groups with... -
Time–frequency analysis of cryptocurrency attention
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Zuzana Kučerová --- VSB-Technical University of Ostrava, Czech Republic Svatopluk Kapounek --- Mendel University in Brno, Czech Republic Jarko Fidrmuc --- Mendel University in Brno, Czech RepublicWe present a wavelet analysis of retail investor attention and the daily returns of Bitcoin, Ethereum, and Litecoin at five selected crypto exchanges that identifies the fractal dynamics of the short- and long-term persistent processes. The investors’ attention is proxied... -
Assessing the influence of the El Niño–Southern Oscillation phase on rainfall variability in the Gauteng province of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: --- University of the Free State, South Africa --- University of the Free State, South AfricaSouth Africa is subject to large rainfall variability, with El Niño–Southern Oscillation (ENSO) being the most important driver across the summer rainfall region. The aim of this study was to relate ENSO phase to historical rainfall variability over the densely... -
Effect of abattoir activities on the quality of water and surrounding soil of the Anwai River in Asaba, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OT Fatunsin --- University of Lagos, Nigeria IG Enenya --- University of Lagos, Nigeria P Ebomese --- University of Lagos, NigeriaThe Anwai River is the most important river in Asaba, Nigeria, because of its many uses, and these include abattoir activities. The aim of this study was to assess the surface water and surrounding soil of the Anwai River for... -
The effect of e-government development indices (EGDI) on corruption perception index in sub-Sahara Africa: A panel data analysis
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chima Paul --- University of Abuja, Nigeria Samuel Olorunfemi Adams --- University of Abuja, NigeriaThe study aims to examine the impact of e-government development indices on the corruption perception index (CPI) using cross-sectional data covering the period 2012–2020. To achieve the objective of the study, the E-Government Development Index (EGDI), which comprises the Online... -
E-government’s role in enhancing foreign direct investment to sub-Saharan African countries: An application of system GMM
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Getahun Tolossa Adugna --- School of Economics, College of Business and Economics, University of Gondar, Ethiopia Wondemhunegn Ezezew Melesse --- School of Economics, College of Business and Economics, University of Gondar, Ethiopia Yinges Alemu Muche --- School of Economics, College of Business and Economics, University of Gondar, EthiopiaIn recent years, the provision of government services through electronic platforms has significantly increased due to the rapid development of digital technologies. The significant shift in digital governance is expected to have an effect on key macroeconomic variables through its... -
On an extension of Hall’s criterion
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Jiangtao Shi --- Yantai University, ChinaLet A and G be finite groups such that A acts coprimely on G by automorphisms, assume that G has a maximal A-invariant subgroup M that is a direct product of some isomorphic simple groups, we prove that if G... -
Assessment of surface water quality in a highly anthropised semi-arid catchment (Case of Wadi El Hatab Basin, Tunisia, North Africa)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: W Hayouni --- University of Sfax, Tunisia N Chkir --- University of Sfax, Tunisia S Pistre --- Université Montpellier, France K Zouari --- University of Sfax, TunisiaAnthropogenic contamination of surface waters is a critical issue in urbanised catchments, especially in Mediterranean environments with scarce water resources and intermittent rivers. A combined hydro-geochemical and multivariate statistical methodology has been applied to evaluate the surface water quality of... -
Assessment of water quality and associated human health risk of a tropical freshwater body in Edo State, Nigeria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Ekene Biose --- University of Benin, Nigeria Nkonyeasua Kingsley Egun --- University of Benin, Nigeria Nkolika Uzoh --- University of Benin, Nigeria Michael Osasele Omoigberale --- University of Benin, NigeriaThe quality of freshwater sources is a key factor in sustainable development. This study investigated the water quality suitability of Ossiomo River for human consumption and the implications for public health. Water samples were collected and analysed from October 2021... -
Diet preference of black rhinoceros Diceros bicornis at Welgevonden Game Reserve, South Africa, across seasons
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Joti Daya --- Nelson Mandela University – George Campus, South Africa Hervé Fritz --- Nelson Mandela University – George Campus, South Africa Jan A Venter --- Nelson Mandela University – George Campus, South AfricaDiet preference of the black rhinoceros Diceros bicornis was determined in Welgevonden Game Reserve (WGR), located in the Waterberg region of Limpopo Province, South Africa. Fieldwork was conducted in the dry, early wet and late wet seasons. Diet preference was... -
Coastal topography and rates of mussel recruitment: a comparison of bay versus open-coast sites
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CD McQuaid --- Rhodes University, South Africa M Buresch --- Rhodes University, South AfricaThe recruitment of intertidal benthic organisms that have planktonic larvae is influenced by hydrodynamics at multiple nested spatial scales, ranging from tens of centimetres to kilometres. Intertidal mussel populations on the south coast of South Africa are known to exhibit... -
Blockchain technology-driven supply chain financing for Ghana’s SMEs: An evaluation of the dilemmas to adoption using a picture fuzzy preference selection index technique
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Elijah Asante Boakye --- University of Electronic Science and Technology of China, People’s Republic of China Hongjiang Zhao --- University of Electronic Science and Technology of China, People’s Republic of China Millicent Adu-Damoah --- University of Electronic Science and Technology of China, People’s Republic of ChinaSmall and medium-sized enterprises (SMEs) have been urged to embrace blockchain technology-driven supply chain financing (BcTSCF) by the Ghana Enterprises Agency (GEA) and the Association of Ghana Industries (AGI); however, a substantial number have not responded favourably. With the utilization... -
Water-quality assessment and spatial distribution of water-quality parameters of Dodoma Urban, Tanzania
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: OJ Mdee --- University of Dodoma, Tanzania B Mndolwa --- University of Dodoma, Tanzania N Sadiki --- University of Dodoma, TanzaniaThe study was conducted in 2022 in shallow wells and deep boreholes owned by residents, to investigate the water quality status in the emerging developing area of Dodoma Urban municipality in central Tanzania. Eighteen boreholes and five shallow wells were... -
Predicting wearable technology readiness in a South African government department: Exploring the influence of wearable technology acceptance and positive attitudes
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Henda J. Thomas --- Tshwane University of Technology, South Africa Cornelia P. J. Harmse --- Tshwane University of Technology, South Africa Cecile Schultz --- Tshwane University of Technology, South AfricaWearable technologies are anticipated to flourish in the fourth industrial revolution, enabling employers to integrate data into organizational systems. This study examined whether readiness for wearables can predict employees’ acceptance of these devices in the workplace. It explored the factors... -
The effectiveness of feedback channels in hotels in Malawi: perspectives of guests
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Dalitso Kalipalire --- Malawi University of Business and Applied Sciences, Malawi Chun Liu --- Beijing International Studies University, ChinaThis study investigates the perceptions of hotel guests of the effectiveness of feedback channels available in hotels in Malawi. The study found that suggestion boxes are the most common feedback channel in hotels. The telephone is the most preferred channel... -
Index characterization and monogenity of septic number fields defined by x 7 + ax 4 + b
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Omar Kchit --- Sidi Mohamed ben Abdellah University, MoroccoIn this paper, we calculate the index of any septic number field K generated by a root α of a monic irreducible trinomial F(x) = x 7 + ax 4 + b ∈ ℤ[x]. Our approach is based on Engstrom’s... -
The effect of superphosphate on the productivity of mucuna (Mucuna pruriens) on a sandy loam soil in Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.D. Shoko --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSA P.J. Pieterse --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSA G.A. Agenbag --- Department of Agronomy, University of Stellenbosch, Private Bag X1, RSAPositive responses to increased soil phosphorus (P) supply have been noted for several leguminous species including mucuna (Mucuna pruriens). The major objective of this research was to investigate the effect of P level of 40 kg P ha-1 on the... -
The effect of online nutrition and lifestyle education on body image dissatisfaction, body mass index, and disordered eating among female university undergraduate students in Lagos, Nigeria
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Foluke Adenike Olatona --- University of KwaZulu-Natal, South Africa Annette Van Onselen --- University of South Africa, South Africa Unathi Kolanisi --- University of Zululand, South Africa -
Effect of altitudinal gradient on reproductive and feeding behaviours of four congeneric endemic freshwater fish in the Zat Catchment (Morocco)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Ahnich --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco F Aitboumalassa --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco H Khalki --- Polydisciplinary Faculty, Sultan Moulay Slimane University, Morocco M Naimi --- Polydisciplinary Faculty, Sultan Moulay Slimane University, MoroccoThe adaptive capacity of freshwater fish enables them to undergo morphological and structural changes in response to environmental fluctuations. Documenting these responses is crucial to assess species vulnerability to ecological perturbations. This study investigated the reproductive, feeding and physiological adaptations... -
Sugar-sweetened beverage intake and anthropometric profile of grade 6 learners in the Nelson Mandela Bay area, South Africa: a mixed-methods study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Candice Stansbury --- Stellenbosch University, South Africa Zarina Ebrahim --- Stellenbosch University, South Africa Daniel Nel --- Stellenbosch University, South Africa Penelope Love --- Deakin University, Australia Yolande Smit --- Stellenbosch University, South AfricaBackground: A paucity of data exists regarding the intake of sugar-sweetened beverages (SSBs) among children and the prevalence of childhood overweight and obesity in the Nelson Mandela Bay area in South Africa (SA). -
Spatial and temporal distribution of shallow-water hake Merluccius capensis off the south coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: LCJ Nomxego --- Fisheries and the Environment (DFFE), South Africa OS Kjesbu --- Institute of Marine Research, Norway WHH Sauer --- Rhodes University, South Africa MR Lipinski --- Rhodes University, South AfricaThis study investigated the spatial and temporal distribution of shallow-water hake Merluccius capensis off the south coast of South Africa, using 1 807 females collected by bottom trawling during industry and research surveys between 2014 and 2016. Mean body size... -
Veld condition assessments are unrepresentative at the edges of rotational burn management blocks where grass community composition is atypical
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anne E Goodenough --- School of Education and Science, University of Gloucestershire, UK William S Carpenter --- School of Education and Science, University of Gloucestershire, UK Hannah Toms --- School of Education and Science, University of Gloucestershire, UK Benjamin A Bayliss --- School of Education and Science, University of Gloucestershire, UK Chloe J Cookes --- School of Education and Science, University of Gloucestershire, UK Lena Buerger --- School of Education and Science, University of Gloucestershire, UK Chloe L Cogdell --- School of Education and Science, University of Gloucestershire, UK Sara L Evans --- School of Education and Science, University of Gloucestershire, UK Tom Lancashire --- School of Education and Science, University of Gloucestershire, UK Fern D Kenyon-Hamp --- School of Education and Science, University of Gloucestershire, UK Ruari J MacGregor --- School of Education and Science, University of Gloucestershire, UK Sarah A Morshead --- School of Education and Science, University of Gloucestershire, UK Candace M Pattison --- School of Education and Science, University of Gloucestershire, UK Eli Shrubb --- School of Education and Science, University of Gloucestershire, UK Hannah D Upshall --- School of Education and Science, University of Gloucestershire, UK Charlene R Watts --- School of Education and Science, University of Gloucestershire, UK Lynne MacTavish --- Mankwe Wildlife Reserve, South Africa Melissa Dawson --- Mankwe Wildlife Reserve, South Africa Adam G Hart --- School of Education and Science, University of Gloucestershire, UKFenced reserves provide benefits for wildlife but are vulnerable to overgrazing. Accurate veld condition assessments are essential to inform stocking density, translocation/culling interventions and burn management decisions. Here, for the first time, we test whether atypical changes in the grass... -
Spillovers, correlations and hedging among green bonds, clean energy stocks and fossil fuels: The effects of four turmoils
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Foday Joof --- Eastern Mediterranean University, Turkey Cahit Adaoglu --- Eastern Mediterranean University, Turkey Nigar Taspinar --- Eastern Mediterranean University, TurkeyThis study investigates the volatility spillovers and the hedging among green bonds, clean energy stocks, and fossil fuels markets. During the ten-year sample period between 2012 and 2022, four major turmoils are observed chronologically: The oil price plunge of 2014–2016,... -
Prediction of ambient air pollution with regression approach using machine learning
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bachandeep Singh Bhathal --- University Institute of Computing, Chandigarh University, India Gaurav Gupta --- Punjabi University, India Brahmaleen Kaur Sidhu --- Punjabi University, IndiaAccurate air quality prediction is vital for managing pollution and protecting public health. This study evaluates the performance of three machine learning models – Decision Tree Regression (DTR), Linear Regression (LR), and Random Forest Regression (RFR) – to forecast the... -
Refinement of a site classification system for South African plantation forestry using regionally downscaled climate model input
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Steven Dovey --- Scion (NZ Forest Research Institute Ltd), New Zealand Jacob Crous --- Sappi Shaw Research Centre, South Africa Yolandi Ernst --- Global Change Institute, University of the Witwatersrand, South AfricaDeemed a climate change hotspot, southern Africa is already experiencing increasing average temperatures associated with extreme weather events, such as drought and flooding. Climate change has already induced many weather and climate extremes in South Africa, and these are likely... -
An infinite family of number fields arising from quadrinomials with given p-indices
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Omar Kchit --- Sidi Mohamed ben Abdellah University, MoroccoLet be a number field defined by a monic irreducible quadrinomial , where n > m > 1 are positive integers. In this paper, for any prime number p and for some fixed positive integers ip , we provide infinite... -
Residency, site affinity and coastal movements of the southern African endemic spotted gully shark Triakis megalopterus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: E Cottrant --- South African Shark Conservancy, South Africa JH Morrison --- South African Shark Conservancy, South Africa C Elston --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa TS Murray --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NJ Drobniewska --- South African Shark Conservancy, South Africa LG Underhill --- Department of Biological Sciences, University of Cape Town, South Africa N Hammerschlag --- Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, United States PS Albano --- Rosenstiel School of Marine, Atmospheric, and Earth Science, University of Miami, United States ME McCord --- South African Shark Conservancy, South Africa PD Cowley --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa C Fallows --- Apex Shark Expeditions, South Africa TG Paulet --- South African Shark Conservancy, South AfricaRising global concern regarding the conservation and management of shark species makes it essential to identify key ecological species to guide conservation efforts, especially species with more restricted distributions such as endemic species. The southern African endemic spotted gully shark... -
Individual differences in technological readiness and the adoption of solar dryers: The case of horticultural smallholder farmers in Northern Tanzania
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Dismas Jerome Kimaro --- Nelson Mandela African Institution of Science and Technology (NM-AIST), Tanzania Thomas Kivevele --- Nelson Mandela African Institution of Science and Technology (NM-AIST), Tanzania Anthony Nyangarika --- Nelson Mandela African Institution of Science and Technology (NM-AIST), TanzaniaAdoption of solar dryers among smallholder farmers in developing countries remains low, despite their proven potential to enhance food security. While prior studies emphasize techno-socio-economic barriers, they often overlook individual psychological traits that likely shape adoption behaviour, assuming uniform adoption...