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Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 1. Evaluation of selection criteria
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- Department of Plant Breeding, South AfricaThe objective of this study was to provide a better understanding of the interrelationship between methods of screening for resistance to ear rot, caused by Stenocarpella maydis. The inheritance of resistance as well as genetic and phenotypic correlation of various... -
Breeding for resistance to ear rot of maize, caused by Stenocarpella maydis (Berk) Sutton. 2. Inheritance of resistance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.D. Rossouw --- , South Africa J. B.J. van Rensburg --- , South Africa C.S. van Deventer --- , South AfricaThe inheritance of resistance to ear rot, caused by Stenocarpella maydis, was investigated using a complete diallel cross of 10 inbred lines, ranging from resistant to susceptible. Parents, F1 crosses and reciprocals were evaluated at each of three localities, representative... -
MANAGING THE ST. LUCIA ESTUARY—MESSAGES FROM THE MUD
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R. K. Owen --- , , South Africa A. T. Forbes --- , , South AfricaThe infaunal macrobenthic community of the St Lucia estuary has been exposed to natural disturbance in the form of salinity fluctuations arising from floods and hypersaline conditions, and human-induced interference arising from dredging and beam trawling. The responses of the... -
A REVIEW OF THE MACROBENTHIC FAUNA OF THE MHLATHUZE ESTUARY: SETTING THE ECOLOGICAL RESERVE
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: C. F. Mackay --- , , South Africa D. P. Cyrus --- , , South AfricaThis paper reviews historical and current ecological information on macrobenthos from the Mhlathuze Estuary before and after development of the Richards Bay Harbour. The fauna is described in terms of the potential influence of a change in freshwater inflow to... -
A COMMENT ON THE STATUS AND DISTRIBUTION OF THE GENUS PARATYLODIPLAX SERENE (BRACHYURA: OCYPODIDAE) IN SOUTHERN AFRICA
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: R. K. Owen --- , , South AfricaThe ocypodid genus Paratylodiplax was described in 1974 and contains four species, three of which are endemic to southern Africa where they form an important component of the estuarine benthic fauna. However, very little is known about the biology and... -
Dry matter and nonstructural carbohydrate content as quality parameters in a Lolium multiflorum breeding programme
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.P. Marais --- , Republic of South Africa M. de Figueiredo --- , Republic of South Africa D.C.W. Goodenough --- Agricultural Research Council, Republic of South AfricaA Lolium multiflorum cv. Midmar pasture and ninety individual plants (both Italian and Westerwolds types), from 15 different Lolium multiflorum cultivars in a spaced‐plant trial, were assessed for total nonstructural carbohydrate (TNC) content, TNC yield, dry matter (DM) content, DM... -
Physical determinants of the distribution and abundance of the burrowing ocypodid crab Paratylodiplax blephariskios Stebbing in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen AT Forbes DP Cyrus SE PiperThe burrowing ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. Two estuaries in KwaZulu-Natal, namely St. Lucia and the Mhlathuze, were... -
Salinity tolerance of the burrowing ocypodid crab, Paratylodiplax blephariskios, in the St. Lucia and Mhlathuze estuaries, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South Africa AT Forbes --- , South AfricaThe ocypodid crab, Paratylodiplax blephariskios, is endemic to the southeast coast of southern Africa where it forms an important component of the estuarine benthic fauna in muddy substrata. The St. Lucia and Mhlathuze estuaries are two of the largest estuaries... -
A short note on factors affecting the geographic distribution of the burrowing ocypodid crab, Paratylodiplax blephariskios: temperature, habitat and competition
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: RK Owen --- Department of Zoology, South AfricaThe known distribution of Paratylodiplax blephariskios extends from the Morrumbene estuary in Mozambique to the Mngazana estuary in the Eastern Cape. Laboratory data on the temperature tolerance of P. blephariskios indicated that the crab could survive temperatures between 12.5°C and... -
The reproductive biology of Diplodus argenteus (Sparidae) in the coastal upwelling system of Cabo Frio, Rio de Janeiro, Brazil
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GS David R Coutinho I Quagio-Grassiotto JR VeraniThe reproductive biology of the seabream Diplodus argenteus, a dominant coastal fishery species, was investigated over two consecutive seasons (2001–2002) at Cabo Frio, Brazil, a low-latitude upwelling system. The sex ratio was dominated by females (1.4:1.0) and the length-at-50% sexual... -
Spionid polychaetes infesting cultured abalone Haliotis midae in South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CA Simon A Ludford S WynneA study was conducted to identify and quantify the spionid polychaetes that infest cultured abalone Haliotis midae at aquaculture facilities on the west (Farm A), south (Farms B and C) and east (Farm D) coasts of South Africa. The relationship... -
Die-back of kiaat (Pterocarpus angolensis) in southern Africa: a cause for concern?
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: JWM Mehl --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South Africa CJ Geldenhuys --- Department of Forest and Wood Science, South Africa J Roux --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South Africa MJ Wingfield --- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), DST/NRF Centre of Excellence in Tree Health Biotechnology (CTHB), Faculty of Natural and Agricultural Sciences, South AfricaPterocarpus angolensis (kiaat) is a well-known southern African tree species of commercial importance that occurs in several vegetation types in the Zambezian regional centre of endemism. The most prominent of these vegetation types are the Zambezian miombo woodland and undifferentiated... -
Macroinvertebrate colonisation of artificial substrates in a Nigerian river I: gravel and leaf litter
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JO Olomukoro U OkologumeBenthic macroinvertebrate colonisation of artificial gravel and leaf litter substrates over periods of four to 40 days was examined in the Ogba River, Benin City, Nigeria. Of all the assemblages of organisms identified (398 individuals, 27 taxa) on different substrates,... -
Leptin: a cardiovascular perspective
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AE Schutte --- Hypertension in Africa Research Team (HART), North-West University, R Schutte --- Hypertension in Africa Research Team (HART), North-West University,The development of obesity, as well as resultant type 2 diabetes, hypertension and cardiovascular disease, is causing concern in South Africa. Following the discovery of leptin in 1994, hopes were raised that the manipulation of the leptin axis might yield... -
Lipid accumulation and alkaline phosphatase activity in human preadipocytes isolated from different body fat depots
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AT Ali --- Department of Chemical Pathology, National Health Laboratory Service, WF Ferris --- Division of Endocrinology, Department of Medicine, Faculty of Health Sciences, CB Penny --- Department of Medicine, M-T Van der Merwe --- University of Pretoria and Waterfall City Hospital, BF Jacobson --- Department of Haematology and Molecular Medicine, National Health Laboratory Service, JE Paiker --- Department of Chemical Pathology, National Health Laboratory Service, NJ Crowther --- Department of Chemical Pathology, National Health Laboratory Service,Background: Alkaline phosphatase (ALP) controls intracellular lipid accumulation in human preadipocytes, but it is not known whether ALP is expressed in all body fat depots, or whether it has a similar role at all sites. -
A practical approach to urine dipstick test abnormalities in relation to kidney and urinary tract disorders in children
Item type: Journal Article • Journal: South African Family Practice • Authors: G Van Biljon --- Department of Paediatrics, Faculty of Health Sciences,The routine use of urine dipstick testing in the consulting room of the family physician has fallen into disfavour for several reasons. One of the arguments cited most often is that it is time consuming and not cost beneficial. This... -
Dipeptidyl peptidase-4 inhibitors: their role in the management of type 2 diabetes
Item type: Journal Article • Journal: South African Family Practice • Authors: Gail Mkele [AN0001]The production of glucagon-like peptide 1 (GLP-1), an incretin hormone, has been shown to be abnormally low in patients with type 2 diabetes, suggesting that GLP-1 may be a contributor in the pathogenesis of the disease. New type 2 diabetic... -
Polydorid polychaetes (Spionidae) on farmed and wild abalone (Haliotis midae) in South Africa: an epidemiological survey
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MK Boonzaaier --- Department of Botany and Zoology, South Africa S Neethling --- Department of Botany and Zoology, South Africa A Mouton --- Amanzi Biosecurity, South Africa CA Simon --- Department of Botany and Zoology, South AfricaAlthough there has been an increase in our understanding of the shell-boring polydorids that infest abalone Haliotis midae in South Africa, abalone from a limited number of farms, and wild populations from east of Cape Agulhas only, have been examined... -
Ecology of diplostomid (Trematoda: Digenea) infection in freshwater fish in southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Andri Grobbelaar --- Department Zoology and Entomology, South Africa Liesl L. Van As --- Department Zoology and Entomology, South Africa Hennie J.B. Butler --- Department Zoology and Entomology, South Africa Jo G. Van As --- Department Zoology and Entomology, South AfricaThe complex life cycles of most trematode parasites include three hosts. The first intermediate host is a snail, the second is normally a teleost fish and a piscivorous bird serves as the definitive host. Lymnaeid snails are most likely to... -
Pathology of eyes and brain of fish infected with diplostomids, southern Africa
Item type: Journal Article • Journal: African Zoology • Authors: Andri Grobbelaar --- Department Zoology and Entomology, University of the Free State, South Africa Liesl L van As --- Department Zoology and Entomology, University of the Free State, South Africa Jo G van As --- Department Zoology and Entomology, University of the Free State, South Africa Hennie JB Butler --- Department Zoology and Entomology, University of the Free State, South AfricaOnly a few reports exist on diplostomid metacercariae found in southern African fish and even less information is available on the pathology associated with these infections. During surveys conducted in December 2008 and August 2010, different fish species were collected... -
Dipeptidyl peptidase-4 inhibitors: their role in the management of type 2 diabetes
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Gail Mkele [cor1]The production of glucagon-like peptide 1 (GLP-1), an incretin hormone, has been shown to be abnormally low in patients with type 2 diabetes, suggesting that GLP-1 may be a contributor in the pathogenesis of the disease. New type 2 diabetic... -
Oxygen dissociation curves of whole blood from the Egyptian free-tailed bat, Tadarida aegyptiaca E. Geoffroy, using a thin-layer optical cell
Item type: Journal Article • Journal: African Zoology • Authors: W.J. van Aardt --- School of Environmental Sciences and Development, South Africa G.N. Bronner --- Department of Zoology, South Africa Marie-Louise de Necker --- School of Environmental Sciences and Development, South AfricaTadarida aegyptiaca (mean body mass 13.5 g) is a fast flying insectivorous bat that hunts in open areas for extended periods, covering extensive distances during its foraging bouts. Whole blood samples taken from the wing arteries were analysed for 2,3-diphosphoglyceric... -
Sampling strategies for millipedes (Diplopoda), centipedes (Chilopoda) and scorpions (Scorpionida) in savanna habitats
Item type: Journal Article • Journal: African Zoology • Authors: Dave Druce --- School of Life and Environmental Sciences, George Campbell Building,, South Africa Michelle Hamer --- School of Botany and Zoology, South Africa Rob Slotow --- School of Life and Environmental Sciences, George Campbell Building,, South AfricaAt present considerable effort is being made to document and describe invertebrate diversity as part of numerous biodiversity conservation research projects. In order to determine diversity, rapid and effective sampling and estimation procedures are required and these need to be... -
Adiponectin could be a comprehensive marker of metabolic syndrome in obese children
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: H. Atwa --- Department of Pediatrics, B. Mesbah --- Department of Pediatrics, A. Sad --- Department of Pediatrics,Objectives: The objectives were to investigate the relationship between the serum adiponectin level and the metabolic syndrome (MS) phenotype in children, and to examine the independent association between the serum adiponectin level and the individual components of MS. -
Diplopia
Item type: Journal Article • Journal: South African Family Practice • Authors: Khathutshelo Percy Mashige --- Discipline of Optometry, School of Health Sciences, South Africa Alvin Jeffrey Munsamy --- Discipline of Optometry, School of Health Sciences, South AfricaPatients frequently present to medical facilities and emergency rooms with symptoms of diplopia, where a single object is observed as two items. It is important for the clinician to know the clinical presentation of diplopia to be able to determine... -
The relationship between obesity, leptin, adiponectin and the components of metabolic syndrome in urban African women, Free State, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sanet van Zyl --- Faculty of Health Sciences, Department of Basic Medical Sciences, South Africa Lynette J van der Merwe --- Faculty of Health Sciences, Department of Basic Medical Sciences, South Africa Francois C van Rooyen --- Faculty of Health Sciences, Department of Biostatistics, South Africa Gina Joubert --- Faculty of Health Sciences, Department of Biostatistics, South Africa Corinna M Walsh --- Faculty of Health Sciences, Department of Nutrition and Dietetics, South AfricaObjectives: Obesity prevalence is increasing worldwide. In South Africa, older and urbanised African women have significantly higher rates of obesity. Limited information is available on the relationship between anthropometric parameters, adipokines and metabolic health status of African women. This study... -
Molecular identification of polydorid polychaetes (Annelida: Spionidae): is there a quick way to identify pest and alien species?
Item type: Journal Article • Journal: African Zoology • Authors: Lee-Gavin Williams --- Department of Botany and Zoology, South Africa Stephen A Karl --- University of Hawai‘i at Mānoa, Hawai‘i Institute of Marine Biology, USA Stanley Rice --- Department of Biology, USA Carol Simon --- Department of Botany and Zoology, South AfricaThe early detection and correct identification of polydorid polychaete species is essential as they are often encountered as invasive alien pests in aquaculture facilities or the intertidal where they may modify the ecosystem. Accurate identification is, however, often hampered by... -
On the Poetics and Politics of the Afar Kassow
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Gidey Alemu Muauz --- Department of Political Sciences, South Africa Mohamed Hassan Saleh --- Research and Study Center of Djibouti (CERD), Djibouti RepublicThe Afar people have a rich poetic tradition pertaining to every aspect of their pastoral way of life in the harsh condition of the Afar desert. One of the many genres of Afar poetics is Afar Kassow the folk’s poetized... -
Systematic reinstatement of Schilbe depressirostris (Peters, 1852), based on differences in DNA barcoding and morphology, from Schilbe intermedius Rüppell, 1832 (Siluriformes, Schilbeidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: HF van der Bank --- African Centre for DNA Barcoding, Kingsway Campus, South Africa BS Bezeng --- African Centre for DNA Barcoding, Kingsway Campus, South Africa PH Skelton --- South African Institute for Aquatic Biodiversity, South AfricaClimate change poses an unprecedented threat to biodiversity worldwide. Consequently, unrecognised taxa may not receive adequate conservation attention to survive. We used molecular and morphological data to address the challenge of species delimitation within the genus Schilbe. The presence or... -
Assessment of enrichment planting of teak (Tectona grandis) in degraded dry deciduous dipterocarp forest in the Central Highlands, Vietnam
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Bao Huy --- Department of Forest Resources and Environment Management, Vietnam Pham Cong Tri --- Western Highlands Agriculture and Forestry Science Institute, Vietnam Tran Triet --- University of Science, VietnamAfter years of unsustainable logging, dry deciduous dipterocarp forest (DDDF) has become poor in timber stocks and has been converted to industrial crops such as rubber. The objectives of this study were to assess teak (Tectona grandis L.f.) tree establishment... -
Seasonal occurrence and ecological aspects of Afrodiplozoon polycotyleus (Monogenea: Diplozoidae) from the gills of three cyprinids from the Nwanedi-Luphephe dams, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: EM Mbokane --- Aquaculture Research and Development, South Africa J Theron --- Aquaculture Research Unit, University of Limpopo, South Africa WJ Luus-Powell --- Department of Biodiversity, South AfricaThe effect of seasonal changes and ecological aspects of Afrodiplozoon polycotyleus (Paperna, 1973) collected on Labeobarbus marequensis (Smith, 1841), Enteromius trimaculatus (Peters, 1852) and Enteromius radiatus (Peters, 1853) was investigated from January to October 2008. Fish were collected at the... -
Brominated flame retardants in wild bird eggs from the industrialised heartland of South Africa
Item type: Journal Article • Journal: African Zoology • Authors: LP Quinn --- National Metrology Institute of South Africa, South Africa C Roos --- Unit of Environmental Sciences and Management, South Africa R Pieters --- Unit of Environmental Sciences and Management, South Africa A Polder --- Unit of Environmental Sciences and Management, South Africa H Bouwman --- Unit of Environmental Sciences and Management, South AfricaBrominated flame-retardants (BFRs), including polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCD), were analysed in 77 eggs of 13 wild bird species from Gauteng and northern Free State (the industrial heartland of South Africa). BFRs were in all eggs, but not... -
Body composition of HIV-positive candidates for and recipients of a kidney transplant: comparative analysis between DEXA and anthropometric indices
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: CJ Martin --- , South Africa E Muller --- , South Africa D Labadarios --- , South Africa FJ Veldman --- , South Africa SM Kassier --- , South AfricaObjective: To determine body composition (BC) and the correlation, if any, between indices measured by anthropometry and dual-energy X-ray absorptiometry (DEXA). -
Investigating the potential for saltpan restoration for the provision of multiple ecosystem services
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Johan Wasserman --- , South Africa Janine B Adams --- , South Africa Daniel A Lemley --- , South AfricaSaltpans are increasingly being abandoned around the world, leading to the loss of ecosystem services provided by these unique semi-natural wetlands. The desertion of a saltpan at the Swartkops Estuary, South Africa has left behind a large area of desiccated... -
Effects of diet on the systematic utility of the tortoise carapace
Item type: Journal Article • Journal: The Journal of the Herpetological Association of Africa • Authors: Justin Gerlach --- University Museum of Zoology Cambridge, U.K.The main character used in identifying species of Chelonia is the carapace. The taxonomy of several terrestrial tortoise genera remains highly disputed, due in part to a limited knowledge of the limits of variation in many populations. For taxa where...