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The Impact of Weeds and Two Legume Crops on Eucalyptus Hybrid Clone Establishment
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.W. Schumann --- ,The relative competition imposed on Eucalyptus hybrid clone GC304 grown from establishment with either complete weed cover, intra-row weeds, inter-row weeds or legume cover crops of Mucuna pruriens and Vigna sinensis is under study in a field experiment on a... -
The influence of an Acacia karroo tree on grass production in its vicinity
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- Department of Agriculture and Water Supply (East Cape Region), N.N. Tainton --- Department of Agriculture and Water Supply (East Cape Region), H.J. Barnard --- Department of Agriculture and Water Supply (East Cape Region),The investigation was concerned with the impact of an Acacia karroo tree on the productivity of the surrounding herbaceous layer. -
Browse and herbage production in the eastern cape thornveld in response to tree size and defoliation frequency
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- , N.M. Tainton --- Department of Grassland Science,Grass yields in this semi‐arid savanna declined as the size of Acacia karroo increased. Browse yields, however, did not increase as trees grew out beyond 1,8 m in height and it follows that if bush thinning is required, then the... -
Evapotranspirasie in drie plantgemeenskappe van ‘n Rhigozum trichotomum habitat te upington
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Moore --- , J.A.J. Van Eck --- , J.P. Van Niekerk --- , B.L. Robertson --- ,Evapotranspirasie in drie plantgemeenskappe van ‘n R. trichotomum habitat, naamlik, suiwer gras, suiwer R. trichotomum en ‘n gemengde stand van R. trichotomum en gras is gedurende die 1985–86 groeiseisoen bestudeer. Drie persele van elke plantgemeenskap is hidrologies geisoleer, besproei en... -
Effect of nitrogen application, seeding rate and defoliation height on mixtures of Trifolium vesiculosum cv Amclo and Lolium multiflorum cv Midmar: I. dry matter production, crude protein content and crude protein production*
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: Marike van Denberg --- , A.J. Kruger --- , V.D. Wassermann --- ,The interaction between Trifolium vesiculosum cv Amclo and Lolium multiflorum cv Midmar was measured in a field trial, in terms of dry matter production, crude protein content and crude protein production. The treatments included in the field trials were five... -
Plant relations in mixtures of trifolium subterraneum cv mt barker and loliumm ultiflorum cv Midmar: I. dry matter production, crude protein content and crude protein production
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: Marike van Denberg --- , A. J. Kruger --- ,The interaction between Trifolium subterraneum cv Mt Barker and Lolium multiflorum cv Midmar was measured in a field trial in terms of dry matter production, crude protein content and crude protein production. The treatments included five different seeding rates of... -
Quantitative description of woody plant communities: Part I. An approach
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.N. Smit --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South AfricaVarious descriptive units for woody plant communities are proposed. These are the Evapotranspiration Tree Equivalent (ETTE), Browse Tree Equivalent (BTE) and Canopied Subhabitat Index (CSI), which describe the status of a woody community in terms of potential moisture use, value... -
A preliminary account of growth characteristics and seed germination of Cassia mimosoides L. in Dohne Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: T.D. Steinke --- Department of Botany, Republic of South Africa L.O. Nel --- Department of Agriculture (Eastern Cape Region), Republic of South AfricaAn autecological study of Cassia mimosoides L., which invades mismanaged Dohne Sourveld, was initiated at the Agricultural Research Institute, Dohne. A study of the growth characteristics revealed that the nature of the root distribution enabled the plant to take up... -
Die invloed van stikstoftoediening, saaidigtheid en metode van vermenging van komponente op mengsels van Trifolium vesiculosum en Lolium multiflorum 1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M. van den Berg --- , Republiek van Suid‐Afrika A.J. Kruger --- , Republiek van Suid‐Afrika V.D. Wassermann --- , Republiek van Suid‐AfrikaThe influence of nitrogen application, seeding rate and methods of mixing of components on mixtures of Trifolium vesiculosum and Lolium multiflorum. The interaction between Trifolium vesiculosum cv. Amclo and Lolium multiflorum cv. Midmar in mixtures was measured in an irrigated... -
Plant relations in mixtures of Trifolium subterraneum cv. Mt Barker and Lolium multiflorum cv. Midmar: II. Yield advantage as reflected in the Land Equivalent Ratio
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M. van den Berg --- , Republic of South Africa A.J. Kruger --- , Republic of South AfricaLand Equivalent Ratios (LER) were calculated for mixtures of Trifolium subterraneum and Lolium multiflorum in terms of dry matter production and crude protein production. This ratio denotes the yield advantage, if any, of a specific mixture against the pure stands... -
Relations between woody and herbaceous components and the effects of bush‐clearing in southern African savannas
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: W.R. Teague --- , Republic of South Africa G.N. Smit --- , Republic of South AfricaThe relations between woody and herbaceous plants in southern African savannas are reviewed in the context of pastoral use. Current knowledge is summarized, important gaps are indicated and research priorities are suggested. Although all savannas consist of a grass and... -
Intercropping of beans (Phaseolus vulgaris L.) and sugar-cane: The effect of inter-specific competition on the growth of plant cane
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. F.A. Leclezio --- Department of Crop Science, J.D. Lea --- Department of Crop Science, P.K. Moberly --- ,The competitive effects of intercropped beans (maturation period: three months) on the growth, tiller development and yield of plant sugar-cane (maturation period: 18 months) in the subhumid coast-hinterland of Natal were investigated over two seasons. In the first season rainfall... -
Methods of presenting intercropping results and preliminary results with Zea mays and Phaseolus vulgaris
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.N. Austin --- Department of Agronomy, J.N. Marais --- Department of Agronomy,Replacement intercropping trials with maize and dry beans were conducted to provide information which could lead to a cropping strategy that would reduce the risk of rainfed crop production in the Ciskei. Attention is focused on the problem of analysing... -
South African Journal of Plant and Soil Instructions to Authors
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.S. Hammes --- Department of Plant Production, Republic of South Africa B. Kriel --- Department of Plant Production, Republic of South Africa E.A. Beyers --- Department of Plant Production, Republic of South AfricaSingle maize plants (Zea mays L cv. SNK 2244) were grown in sand culture in polyethylene tubes (300 mm × 110 mm diam.) in a glasshouse. Apparent photosynthetic rate was determined at intervals during the growing period, using a portable... -
The effect of Oxalis latifolia competition in maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. E.L. Thomas --- Summer Grain Sub-centre, Republic of South AfricaThe competitive effect of Oxalis latifolia H.B.K, (red garden sorrel) in maize has been investigated in the past four seasons at Cedara. The site chosen had a heavy O. latifolia infestation. In each of the four seasons initial weed control... -
The compatibility of Trifolium resupinatum cv. Shaftal Maral and Lolium multiflorum (type Westerwolds) cv. Energa in mixtures as affected by nitrogen application and different seeding rates
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. van den Berg --- Department of Agricultural Development, Republic of South Africa A.J. Kruger --- Department of Agricultural Development, Republic of South Africa J.V. Lello --- Department of Agricultural Development, Republic of South AfricaNitrogen fertilizer was applied at four different rates to pure and mixed stands of irrigated Trifolium resupinatum and Lolium multiflorum to study their compatibility. Dry matter production, crude protein content, crude protein production and the Land Equivalent Ratio were determined... -
Kompetisie tussen koring (Triticum aestivum L.) en Bromus diandrus I. Invloed op vegetatiewe groei
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.M. Ferreira --- Departement Landbou-ontwikkeling, Republiek van Suid-Afrlka G.A. Agenbag --- Departement Akkerbou en Weiding, Republiek van Suid-AfrikaDie doel van hierdie studie was om die kompetisievermoë van koring (Triticum aestivum L.) en Bromus diandrus Roth, te vergelyk in terme van vegetatiewe groei in veldproewe. Die proewe is ontwerp as 'n verpla- singsmodel met sewe populaslesamestellings (behandelings) en... -
Kompetisie tussen koring (Triticum aestivum L.) en Bromus diandrus II. Invloed op reproduksie
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.M. Ferreira --- Departement Landbou-ontwlkkeling, Republiek van Suid-Afrika G.A. Agenbag --- Departement Akkerbou en Weiding, Republiek van Suid-AfrikaDie effek van kompetisie tussen koring (Triticum aestivum L.) en Bromus diandrus Roth, op reproduktiewe groei is gedurende 1988 en 1989 in veldproewe ondersoek. Die graanopbrengs van koringplante is in beide jare betekenisvol beïnvloed deur kompetisie en verskille in opbrengs... -
An incomplete block design for reducing competition between inbreds and hybrids in a diallel cross experiment
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: T. Hohls --- Department of Genetics, Republic of South Africa G. P.Y. Clarke --- Department of Statistics and Biometry, Republic of South AfricaInterplot competition in plant breeding experiments can substantially reduce the efficiency of plant selection. In diallel experiments on outcrossing species such as maize (Zea mays L.), competing stresses might result from differences in vigour between inbred and hybrid entries. A... -
A rapid demonstration of the self-thinning rule using radish
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F.R. Smith --- , South AfricaThe self-thinning rule describes the relationship between individual mass and density in crowded evenly-aged plant populations in which the slope of the relationship is always greater than -1. This study investigated whether the rule could be demonstrated in six weeks... -
NOTE ON THE OCCURRENCE OF A VENTRAL SUCKER-LIKE MOUTH FORM IN LABEO UMBRATUS (PISCES, CYPRINIDAE)
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: I.G. Gaigher --- , South AfricaThe occurrence of a ventral sucker-like mouth form in certain populations of Labeo umbratus, which are free from competition by L. aapensis, is reported. It is proposed that this might be an adaptation to feeding off stones which enhances the... -
Dietary overlap between Boer goats and indigenous browsers in a South African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Breebaart R Bhikraj TG O'ConnorThe winter diet of free ranging Boer goats in Valley Bushveld, KwaZulu-Natal, was determined by direct observations and compared with the diet of indigenous browsers (kudu, eland, giraffe, black rhinoceros) in order to determine which browsers are most compatible with... -
Small‐scale reseeding trials in arid rangeland: Effects of rainfall, clearing and grazing on seedling survival
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.J. Milton --- FitzPatrick Institute, Republic of South AfricaSeeds of four indigenous plant species were sown in 1990 in small‐scale field trials in an arid, non‐seasonal rainfall region of the southern Karoo, South Africa. Seeds of a winter annual Tetragonia echinata (Aizoaceae) showed innate dormancy but those of... -
Review article: Vegetative growth, reproduction, browse production and response to tree clearing of woody plants in African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.N. Smit --- Department of Grassland Science, Republic of South Africa N.F.G. Rethman --- Department of Plant Production and Soil Science, Republic of South Africa A. Moore --- Department of Agriculture, Republic of South AfricaThis review deals with issues including the determinants of vegetative growth of woody plants (soil water availability, water stress, soil nutrient availability, carbohydrate reserves, plant hormones, atmospheric CO2 concentration, tree age, competition, defoliation and shoot pruning, fire, pathogens, soil and... -
Grass-on-grass competition along a catenal gradient in mesic grassland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MJ Tedder --- School of Biological and Conservation Sciences, South Africa CD Morris --- School of Biological and Conservation Sciences, South Africa RWS Fynn --- School of Biological and Conservation Sciences, South Africa KP Kirkman --- School of Biological and Conservation Sciences, South AfricaInteractions between mature grass plants and grass seedlings have been found to be both facilitative and competitive. To examine the effects of aboveground and belowground competition on seedling biomass and the effects of soil depth on competitive interactions, seedlings of... -
The influence of tree thinning on the establishment of herbaceous plants in a semi-arid savanna of southern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.N. Smit F.G. RethmanThe investigation was conducted on an area covered by a dense stand of Colophospermum mopane. Seven plots (65 m × 180 m) were subjected to different intensities of tree thinning, ranging from a totaly cleared plot (0%) to plots thinned... -
Laboratory and quasi-field studies on interspecific competition between Bulinus globosus and B. tropicus (Gastropoda: Planorbidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: B Ndlela H MadsenCompetition between Bulinus tropicus and Bulinus globosus was investigated under laboratory and quasi-field conditions. Only the latter species serves as intermediate host for Schistosoma haematobium in Zimbabwe. Growth, egg laying and survival were followed for various densities of the two... -
Predation on snails by an indigenous fish, Sargochromis codringtonii, in ponds in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MJ Chimbari H MadsenThe extent to which Sargochromis codringtonii (a known predator of snails) can control snail numbers was investigated in cementlined ponds in order further to evaluate the fish's potential as an agent for the biological control of fresh water snails, especially... -
The distribution and habitat in the Knysna Estuary of the endemic South African mudsnail Hydrobia knysnaensis and the influence of intraspecific competition and ambient salinity on its abundance
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Rsk BarnesThe typical habitat of the rare, endemic South African mudsnail Hydrobia knysnaensis is the leaves of upper-shore Zostera capensis within high-salinity salt-marsh pools and channels. In the Knysna estuarine system, it is the numerically dominant member of a guild of... -
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... -
A comparison of diel feeding pattern, ingestion and digestive efficiency of Oreochromis niloticus and Oreochromis macrochir in Lake Chivero, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LT Marufu --- Department of Biological Sciences, Zimbabwe PC Chifamba --- Department of Biological Sciences, ZimbabwePossible reasons why Oreochromis niloticus have supplanted Oreochromis macrochir as the main commercial fish species in Lake Chivero, Zimbabwe, were investigated in 2006. Diel feeding trends, daily food consumption and protein digestion efficiencies of the two species were compared. Both... -
Spatial Comparisons of Populations of an Indigenous Limpet Scutellastra Argenvillei and an Alien Mussel Mytilus Galloprovincialis Along a Gradient of Wave Energy
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C. N. Steffani G. M. BranchIn the 1970s, the Mediterranean mussel Mytilus galloprovincialis invaded the South African coast and spread rapidly to dominate much of the West Coast, indicating either the opportunity to occupy a vacant niche or its superior competitive capability over indigenous species... -
Temporal Changes in an Interaction Between an Indigenous LimpetScutellastra Argenvillei and an Alien Mussel Mytilus Galloprovincialis: Effects of Wave Exposure
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C.N. Steffani G.M. BranchA previous survey of 15 sites off the Namaqualand coast on the west coast of South Africa provided evidence of a competitive interaction between an alien mussel Mytilus galloprovincialis and an indigenous limpet Scutellastra argenvillei, and indicated that wave action... -
Accounting for food requirements of seabirds in fisheries management – the case of the South African purse-seine fishery
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R. J. M. CrawfordIn South Africa, four of the seabirds that feed mainly on sardine Sardinops sagax and anchovy Engraulis encrasicolus have an unfavourable conservation status or a small population: African penguin Spheniscus demersus, Cape gannet Morus capensis, Cape cormorant Phalacrocorax capensis and... -
Ecosystem considerations of the KwaZulu-Natal sardine run
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Hutchings --- Oceans and Coasts, Department of Environmental Affairs, South Africa T Morris --- Bayworld, Port Elizabeth Museum, South Africa CD van der Lingen --- Marine Research Institute, South Africa SJ Lamberth --- Branch Fisheries, Department of Agriculture, South Africa AD Connell --- , South Africa S Taljaard --- , South Africa L van Niekerk --- , South AfricaThe annual winter sardine run along the South African east coast impacts the KwaZulu-Natal (KZN) coastal system in a variety of ways. These include ecological impacts, such as enrichment of a largely oligotrophic environment, competition between migrant sardine Sardinops sagax,... -
Final results from a trial to test the effect of plot size on Eucalyptus hybrid clonal ranking in coastal Zululand, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: TK Stanger --- , South Africa GM Galloway --- Shaw Research Centre, South Africa ECL Retief --- Shaw Research Centre, South AfricaHybrid clones with Eucalyptus grandis as one parent and, generally, E. urophylla as the other parent, are deployed commercially as monoclonal blocks by Sappi in the subtropical region of coastal Zululand, South Africa. In monoclonal blocks genotypes are grown in... -
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... -
Interactions between Bulinus globosus and B. tropicus (Gastropoda: Planorbidae) in a pond experiment in Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Busani Ndlela MosesJ Chimbari Henry MadsenBulinus tropicus, which does not transmit Schistosoma haematobium, has been suggested for biological control of the schistosome intermediate host Bulinus globosus in Zimbabwe. The possible competition between B. tropicus and B. globosus was evaluated under semi-natural conditions in an enclosure... -
Balanus glandula: from North-West America to the west coast of South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: N Simon-Blecher Z Granevitze Y AchituvWe report the occurrence of the North-East Pacific intertidal barnacle Balanus glandula in the south-western African shores of the Atlantic Ocean. In addition, an attempt is made to trace the origin of the South African population by comparing the distribution... -
Effects of herbivore grazing on the physiognomy of the coralline alga Spongites yendoi and on associated competitive interactions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: GW Maneveldt DW KeatsThe territorial gardening limpet Scutellastra cochlear occurs along the south and southern west coasts of South Africa, whereas one of its primary food items, the encrusting coralline alga Spongites yendoi, extends much farther north along the West Coast. A combined... -
Evaluating seal–seabird interactions in southern Africa: a critical review
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: SP KirkmanThrough predation and displacement, the Cape fur seal Arctocephalus pusillus pusillus poses a threat to several seabird species that breed in southern Africa. Measures such as the culling of 'problem' seals have been introduced to negate the effects on these... -
Effects of fishing on a temperate reef community in South Africa 2: benthic invertebrates and algae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Götz --- , South Africa SE Kerwath --- Department of Environmental Affairs, South Africa CG Attwood --- Marine Research Institute, Department of Zoology, South Africa WHH Sauer --- Department of Ichthyology and Fisheries Science, South AfricaThe effect of fishing on benthic reef communities was studied by comparing reefs within and outside the Goukamma Marine Protected Area (MPA) on the South African warm-temperate south coast. Although study sites were similar in terms of bathymetry and oceanographic... -
Can brush-cutting of Pteronia paniculata improve the composition and productivity of veld in the Succulent Karoo, South Africa?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N Saayman --- Department of Agriculture: Western Cape, South Africa CD Morris --- Agricultural Research Council, South Africa MB Hardy --- Department of Agriculture: Western Cape, South Africa JC Botha --- Department of Agriculture: Western Cape, South AfricaPteronia paniculata is an indigenous, unpalatable shrub that invades mismanaged Karooveld, resulting in degraded rangelands with low species diversity and grazing potential. We conducted a series of trials in the Succulent Karoo Randteveld near Barrydale to determine if the uniform... -
Performance of Eucalyptus dunnii as influenced by vegetation control when felled at nine years in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: KM LittleIn 1997, a trial was initiated to determine the impact of eight vegetation control treatments on the growth of Eucalyptus dunnii Maiden at a warm-temperate site in the KwaZulu-Natal Midlands, South Africa. The treatments included a Weedy and Weed-free check,... -
Individual tree growth differences in a clonal eucalypt blanking trial at four years
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: RN Pallett TL MachakaAchieving a well-stocked stand at time of planting is important to compartment productivity and yield in clonal eucalypt stands for pulpwood production. The window period in which individuals that replace those that died after initial planting (blanks) still contribute meaningfully... -
Shoot allometry of Jatropha curcas
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: SB Ghezehei --- Department of Plant Production and Soil Science, South Africa JG Annandale --- Department of Plant Production and Soil Science, South Africa CS Everson --- Department of Plant Production and Soil Science, South AfricaThe South African government has banned planting of Jatropha curcas L. (Jatropha), potentially a multipurpose tree and biofuel source, owing to insufficient knowledge about the species. Use of allometry as a non-destructive method of monitoring growth and biomass attributes of... -
Winners and losers – responses to recent environmental change by South African seabirds that compete with purse-seine fisheries for food
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert JM Crawford --- Branch Oceans and Coasts, South Africa Azwianewi B Makhado --- Branch Oceans and Coasts, South Africa Lauren J Waller --- CapeNature, South Africa Philip A Whittington --- Department of Zoology, South AfricaThere were recent changes in the distributions of the main prey of four seabirds off South Africa, with sardine Sardinops sagax and anchovy Engraulis encrasicolus shifting from South Africa's north-west coast towards the south-east. This contributed to numbers of African... -
Food habits and trophic resource partitioning among three mormyrid fishes from man-made Lake Ayame, Ivory Coast
Item type: Journal Article • Journal: African Zoology • Authors: E. P. Kouamélan --- Université de Cocody-Abidjan, UFR Bio-sciences, Laboratoire d’Hydrobiologie, Ivory Coast T. Koné --- Université de Cocody-Abidjan, UFR Bio-sciences, Laboratoire d’Hydrobiologie, Ivory Coast V. N’Douba --- Université de Cocody-Abidjan, UFR Bio-sciences, Laboratoire d’Hydrobiologie, Ivory Coast F. Ollevier --- Katholieke Universiteit Leuven (K.U.L), Zoological Institute, Laboratory of Ecology and Aquaculture,, BelgiumFeeding habits and trophic relationships among three mormyrid species (Petrocephalus bovei, Marcusenius ussheri and Marcusenius furcidens) were assessed in the man-made Lake Ayame in Ivory Coast. The index of preponderance combining the occurrence and weight percentages of the identified prey... -
Competition and niche partitioning in a floodplain ecosystem: a cladoceran community squeezed between fish and invertebrate predation
Item type: Journal Article • Journal: African Zoology • Authors: Markus Lindholm --- Department of Biology, Norway Dag Olav Hessen --- Department of Biology, NorwaySeasonal floodplains occasionally comprise highly productive zooplankton communities which are exposed to rapid shifts in predator regimes, also between vertebrate and invertebrate predators.We recorded the impact of two co-occurring zooplankton predators, the notonectid Anisops sardea and 0+ fish fry of... -
Long-term trends in the competitive shore fishery along the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: P. Pradervand --- Oceanographic Research Institute, South Africa B. Q. Mann --- Oceanographic Research Institute, South Africa M. F. Bellis --- Records Officer, South African Shore Angling Association, South AfricaTwenty-four years (1977–2000) of competitive shore angling catch and effort data from the KwaZulu-Natal Coastal Anglers Union for the province of KwaZulu-Natal were analysed. Of a minimum of 117 species recorded, the most commonly caught species were dusky shark (Carcharhinus... -
Do deterministic processes influence the phenotypic patterns of animalivorous bat ensembles at urban rivers?
Item type: Journal Article • Journal: African Zoology • Authors: M. Corrie Schoeman --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville Campus, South Africa Kirby J. Waddington --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, Westville Campus, South AfricaAlthough urbanization is perhaps the most damaging, persistent, and rapidly expanding form of anthropogenic pressure on natural ecosystems, data on the patterns and processes of sympatric bat species in urban landscapes are relatively scant. We quantified the packing and dispersion... -
Interference competition between sunbirds and carpenter bees for the nectar of Hypoestes aristata
Item type: Journal Article • Journal: African Zoology • Authors: Robert Tropek --- Institute of Entomology, Biology Centre, Czech Academy of Sciences, Czech Republic Michael Bartoš --- University of South Bohemia, Czech Republic Eliška Padyšáková --- University of South Bohemia, Czech Republic Štěpán Janeček --- Academy of Sciences of the Czech Republic, Czech RepublicInterference competition for nectar sources has been repeatedly described between hummingbirds and various insects, but rarely recorded in other nectari-vorous birds. We observed aggressive behaviour by African sunbirds (Cinnyris reichenowi and Cinnyris bouvieri) defending the nectar plant Hypoestes aristata against... -
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... -
Towards an isotope ecology of Cape Fynbos small mammals
Item type: Journal Article • Journal: African Zoology • Authors: Irene M. van den Heuvel --- Biozentrum Grindel, Zoological Institute and Museum, University of Hamburg, Martin-Luther-King Platz 3, D-20146 Hamburg, Germany Jeremy J. Midgley --- Department of Botany, South AfricaWe investigated ecological separation through dietary partitioning of small mammals in the nutrient-poor Fynbos biome using a stable isotope approach. Hair samples from eight species of co-occurring small mammals in two separate locations were analysed for stable carbon (13C/12C) and... -
Year-round territoriality in long-lived birds: rethinking the concept of carrying capacity
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Douglas Loewenthal --- , Dane M Paijmans --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- ,Adult African Black Oystercatchers Haematopus moquini are sedentary and territorial year round, with juveniles expressing strong natal philopatry. At four South African study sites (two mainland and two islands) breeding numbers more than doubled between the late 1970s/early 1980s and... -
Dual parasitism of Fork-tailed Drongos by African and Jacobin Cuckoos
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tom P Flower --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Benjamin J Ashton --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Elisabet Zöttl --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Ryan M Olinger --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaDifferent species of brood parasitic birds, which lay their eggs in the nests of host foster-parents, rarely target the same host species population. We report brood parasitism of Fork-tailed Drongos Dicrurus adsimilis in the southern Kalahari Desert by both African... -
Modelling of product demand as a pointer tool for choice of maintenance strategy
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Michael Kanisuru Adeyeri --- Department of Industrial Engineering, South Africa Khumbulani Mpofu --- Department of Industrial Engineering, South Africa Buliaminu Kareem --- Department of Mechanical Engineering, NigeriaThe purpose of this paper is to use product demand or sales turnout of products in a competitive environment as an indicator to suggest maintenance strategies for machinery. The model takes account of singular products from several companies or industries,... -
Long-term trends in the shore fishery of the Transkei coast, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: P. Pradervand --- Oceanographic Research Institute, South AfricaTwenty four years (1977 2000) of competition shore angling catch and effort data from the Natal Coastal Anglers Union for the Transkei were analysed. Of a total of 71 species recorded, the most commonly caught species were Pomatomus saltatrix (19%),... -
Reproductive biology of a pride of lions on Karongwe Game Reserve, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Monika B. Lehmann --- Department of Nature Conservation, South Africa Paul J. Funston --- Department of Nature Conservation, South Africa Cailey R. Owen --- K.e.r.i. Research, Ecological Institute of Research, South Africa Rob Slotow --- School of Biological and Conservation Sciences, South AfricaThe reproductive biology of a pride of lions (Panthera leo) was studied on the 8500 ha Karongwe Game Reserve from 1999 to 2005. Over this period, the pride consisted of between four and 11 lions with a paired coalition of... -
Usurpation of a Crowned Lapwing Vanellus coronatus nest by African Wattled Lapwings V. senegalensis
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Nicholas PC Horrocks --- Department of Zoology, UKI report an instance of usurpation of a Crowned Lapwing Vanellus coronatus nest by a pair of African Wattled Lapwings Vanellus senegalensis. The nest, which originally contained a single Crowned Lapwing egg, eventually contained an additional three Wattled Lapwing eggs,... -
Corporate social responsibility, market competition, and shareholder wealth
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Doowon Ryu --- Business School, Korea University, Korea Doojin Ryu --- Department of Economics, Korea Joon Ho Hwang --- Business School, Korea University, KoreaThis paper examines the association between corporate social responsibility (CSR), product market competition (PMC) and shareholder wealth by analysing CSR and market data from January 2006 to December 2012 (excluding 2009) in Korea. We focus on the role of PMC,... -
Spatial patterns of encroaching shrub species under different grazing regimes in a semi-arid savanna, eastern Karoo, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Admore Mureva --- School of Life Sciences, South Africa David Ward --- School of Life Sciences, South AfricaWoody plant encroachment is increasing in arid and semi-arid regions of the world. We investigated the structure and fine-scale spatial pattern of encroaching species and how these patterns vary with different grazing regimes in semi-arid regions. In this study, we... -
Modelling growth behaviour in monoculture in subtropical eastern Australia of two eucalypt species that differ in shade tolerance
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Philip W West --- Forest Research Centre, School of Environment, Science and Engineering, Australia Kevin Glencross --- Forest Research Centre, School of Environment, Science and Engineering, Australia J Doland Nichols --- Forest Research Centre, School of Environment, Science and Engineering, AustraliaGrowth behaviour of the relatively shade-intolerant species Eucalyptus dunnii and the rather more shade-tolerant Corymbia citriodora was considered during several growth periods over 8–14 years of age in experimental plantation monoculture in subtropical New South Wales. Larger trees dominated growth... -
Not marrying in South Africa: consumption, aspiration and the new middle class
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Deborah James --- Department of Anthropology, London School of Economics, Great BritainThis article explores how marriage, or its absence, features in relation to the aspirations and obligations of members of South Africa’s new black middle class. In a context where the state and credit have played key roles in the newly... -
No evidence for avoidance of black rat scent by the presumably less competitive Natal multimammate mouse in a choice experiment
Item type: Journal Article • Journal: African Zoology • Authors: Laura N Cuypers --- Evolutionary Ecology Group, Belgium Wim L Cuypers --- Evolutionary Ecology Group, Belgium Amélie Gildemyn-Blomme --- Evolutionary Ecology Group, Belgium Laura Abraham --- Evolutionary Ecology Group, Belgium Senne Aertbeliën --- Evolutionary Ecology Group, Belgium Apia W Massawe --- Pest Management Centre, Tanzania Benny Borremans --- Evolutionary Ecology Group, Belgium Sophie Gryseels --- Evolutionary Ecology Group, Belgium Herwig Leirs --- Evolutionary Ecology Group, BelgiumIn Africa, indigenous multimammate mice (Mastomys natalensis) only appear to live commensally in houses when invasive black rats (Rattus rattus) are absent, yet little is known about the underlying mechanism. Avoidance through smell may cause the absence of M. natalensis... -
Market-oriented innovations in tourism
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Ruhet Genç --- Faculty of Economics and Administrative Sciences, Turkey Eda Aylin Genç --- Department of Sociology, UKInnovations are the key elements that boost the economy in a given sector. Particularly, the tourism sector requires different types of innovations, as it is one of the most competitive ones. This paper discusses the role of innovations in the... -
Comparative perch selection in Southern Fiscal Lanius collaris and Fiscal Flycatcher Sigelus silens at Amakhala Game Reserve, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ryan J Daniels --- Department of Zoology and Entomology, South Africa Patrick E Hulley --- Department of Zoology and Entomology, South Africa Adrian JFK Craig --- Department of Zoology and Entomology, South AfricaThe Southern Fiscal Lanius collaris and the Fiscal Flycatcher Sigelus silens are common, widespread and sympatric in much of southern Africa. They are similar in plumage and ecology, which may predispose them to competition and interspecific territorial aggression but this... -
Benthic freshwater nematode community dynamics under conditions of Tilapia aquaculture in Egypt
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: AEA Abada --- Zoology Department, Egypt NF Ghanim --- Zoology Department, Egypt AH Sherif --- Department of Fish diseases, Kafrelsheikh Provincial Laboratory, Egypt NA Salama --- Zoology Department, EgyptStudies of the influence of fish aquaculture on benthic freshwater nematode assemblages are scarce, but could provide a way of gauging environmental effects. The abundance and diversity of nematode assemblages in response to Oreochromis niloticus aquaculture were investigated in Kafr... -
Rotation-end financial performance of vegetation control on Eucalyptus smithii in South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Keith M Little --- School of Natural Resource Management, South Africa Anssi Ahtikoski --- Natural Resources Institute Finland, Finland Andrew R Morris --- Institute for Commercial Forestry Research, South AfricaControl of competing vegetation during eucalypt regeneration is important but the cost-benefit of varying levels of control is not well understood. A trial was initiated to quantify the impact of five vegetation control treatments on Eucalyptus smithii R.T.Baker. to determine... -
The age and growth of hottentot seabream Pachymetopon blochii before and after the South African linefish state of emergency in 2000
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: MW Farthing --- Department of Ichthyology and Fisheries Science, South Africa AC Winkler --- Department of Ichthyology and Fisheries Science, South Africa K Anderson --- Department of Ichthyology and Fisheries Science, South Africa S Kerwath --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa C Wilke --- Branch: Fisheries Management, Department of Agriculture, Forestry and Fisheries (DAFF), South Africa WM Potts --- Department of Ichthyology and Fisheries Science, South AfricaThe hottentot seabream Pachymetopon blochii is a small-sized (maximum 2.67 kg) sparid endemic to southern Africa. It is an important target in South Africa's Western Cape traditional linefishery, particularly in the absence of more valuable pelagic species (such as Thyrsites... -
Minimum population size and potential impact of feral and semi-feral donkeys and horses in an arid rangeland
Item type: Journal Article • Journal: African Zoology • Authors: Halcyone Muller --- Conservation South Africa, South Africa Amanda Bourne --- Department of Biological Sciences, South AfricaFarmers in the northern, communally managed parts of the Succulent Karoo, an arid rangeland system in South Africa, historically used donkeys and horses for transport and ploughing. With increasing mechanisation, draught animal power has largely been replaced by machines. Yet,... -
Implications of geographical range changes and resultant sympatry for three Accipiter hawks on the Cape Peninsula, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Rene A Navarro --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaSome invasive species are known to compete with and even displace indigenous species. Two Accipiter species historically indigenous to eastern South Africa have colonised the Cape Peninsula in the south-west of the country and have become sympatric with a third... -
A review of the use of birds’ nests by Egyptian geese, including a breeding attempt in a hooded vulture nest
Item type: Journal Article • Journal: African Zoology • Authors: Lindy J Thompson --- Centre for Functional Biodiversity, School of Life Sciences, South Africa Carrie J Hickman --- School of Environment, Earth and Ecosystem Sciences, United Kingdom John P Davies --- Birds of Prey Programme, Endangered Wildlife Trust, South Africa Fiona Fern --- Independent researcher, United Kingdom Colleen T Downs --- Centre for Functional Biodiversity, School of Life Sciences, South AfricaEgyptian geese Alopochen aegyptiaca are widely reported to be territorial and aggressive. They are known to attack and sometimes kill other birds and they may attempt to usurp their nests. Here information is collated on the bird species whose nests... -
Mechanisms of interference and exploitation competition in a guild of encrusting algae along a South African rocky shore
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Vanmari --- Department of Biodiversity and Conservation Biology, South Africa GW Maneveldt --- Department of Biodiversity and Conservation Biology, South AfricaWithin the marine benthos, space is considered an absolute requirement that is often in limited supply. The often-low availability of this essential resource causes species to interact competitively through mechanisms of interference and exploitation. Species of encrusting algae, in particular,... -
Response of three mesic South African perennial grassland forbs to defoliation and competition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Sindiso Chamane --- Grassland Science, School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, School of Life Sciences, South Africa Craig Morris --- Agricultural Research Council – Animal Production, c/o School of Life Sciences, South Africa Tim G O’Connor --- SAEON, South AfricaThe importance of maintaining biodiversity in natural grasslands under livestock production systems has been recognised. Forbs contribute more to species richness than grasses in South African grasslands. However, little is known about the impact of grazing and grass competition on... -
Interspecific competition for cliff ledges on the Magaliesberg between nesting Verreaux’s Eagles and roosting Chacma baboons
Item type: Journal Article • Journal: African Zoology • Authors: G Malan --- , South Africa K Padayachee --- , South AfricaAnimals that share suitable rock ledges located on near-vertical cliff faces are compelled to interact when using this scarce resource. Because interspecific and exploitative competition for suitable ledges may have a vital influence on the survival and reproduction of Verreaux’s... -
Sibling competition in the broods of Little Egrets Egretta garzetta in a southern Tunisian breeding colony
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Amel Neb --- , Tunisia Slaheddine Selmi --- , TunisiaAsynchronous hatching is a common hatching pattern in the Little Egret Egretta garzetta, however, its role in maintaining dominance relationships and feeding hierarchy among siblings remains poorly studied. In this study, we investigated this issue using data on feeding and... -
Winter breeding season of Brown-throated Martins Riparia paludicola in Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Peter W Greig-Smith --- , United KingdomUniquely among birds of coastal North Africa, Brown-throated Martins breed during the northern winter. Over ten years, the amount of rainfall in the six months before the breeding season was positively correlated with numbers of nests in November, and negatively... -
National digital taxes – Lessons from Europe
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Stefanie Geringer --- , AustriaDigitalisation has done more to shape the 21st century than virtually any other phenomenon. However, international tax law has seemingly failed to keep pace with rapid technological developments, which has likely led to inequalities between the tax burden of traditional... -
The influence of estuary eutrophication on the benthic diatom community: a molecular approach
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Nunes --- , South Africa DA Lemley --- , South Africa GF Matcher --- , South Africa JB Adams --- , South AfricaThe occurrence of harmful algal blooms (HABs) is increasing in frequency and intensity in South African estuaries because of eutrophication. This study used DNA metabarcoding to identify the benthic diatom community structure in the eutrophic Sundays Estuary. The recurrent HAB... -
Structure, growth and growing space efficiency of Pinus radiata (D. Don) trees as affected by their social position
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Hans Pretzsch --- , Germany Andreas Rais --- , Germany Deon Malherbe --- , South Africa Antonio Ruano --- , Spain Hugo Lambrechts --- , The Netherlands Enno Uhl --- , Germany Ben du Toit --- , South AfricaCurrently, silvicultural prescriptions such as thinning monospecific stands from above and transitioning from monospecific to mixed-species stands are scrutinised regarding their ability to reduce stress and damage. That the quantity and quality of the trees harvested by intermediate and final... -
Determining the post-herbivore-exclusion effect on an intertidal community by the recovery response of a known dominant herbivore
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: DC van den Berg --- , South Africa K Sethebe --- , South Africa GW Maneveldt --- , South AfricaFollowing a long-term herbivore-exclusion study (2003-2008) in the mid-eulittoral zone at Kalk Bay, Cape Town, South Africa, the post-herbivore-exclusion effect (12 years later) of the limpet Cymbula oculus, the dominant herbivore in the community, was examined after it had recolonised... -
Are Cape Cormorants Phalacrocorax capensis losing the competition? Dietary overlap with commercial fisheries
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: OB Masiko --- , South Africa PG Ryan --- , South Africa CD van der Lingen --- , South Africa L Upfold --- , South Africa S Somhlaba --- , South Africa M Masotla --- , South Africa Y Geja --- , South Africa BM Dyer --- , South Africa RJM Crawford --- , South Africa AB Makhado --- , South AfricaCape Cormorants Phalacrocorax capensis breed in southern Africa’s Benguela upwelling system and in 2013 were listed as Endangered by the IUCN following a population decrease of >50% over their three most recent generations. This decrease was associated with reduced prey... -
Using crown characterisation variables as indicators of the vigour, competition and growth of Brazilian pine
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Lorena Oliveira Barbosa --- , Brazil César Augusto Guimarães Finger --- , Brazil Emanuel Arnoni Costa --- , Brazil Otávio Camargo Campoe --- , Brazil Cristine Tagliapietra Schons --- , BrazilCrown variables are used in growth and production models to increase the accuracy of estimates. These variables are costly and difficult to measure, mainly in dense native forests such as mixed ombrophilous forests (MOF), where Araucaria angustifolia is the predominant... -
The chemistry of the pedoderm – part 1: grasslands and savannas in the central Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony J Mills --- , South Africa Tercia Strydom --- , South Africa Jessica L Allen --- , South Africa Julia Baum --- ,Treeless grasslands occur within landscapes that are predominantly wooded savannas in the central Kruger National Park, South Africa. As a first step in identifying soil properties potentially underpinning differences in vegetation structure in these landscapes, we analysed the soil chemistry... -
The chemistry of the pedoderm – part 2: Dichrostachys cinerea patches and adjacent grassland in the southern Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony J Mills --- , South Africa Tercia Strydom --- , South Africa Jessica L Allen --- , South AfricaThe small tree, Dichrostachys cinerea, occurs in dense patches within grasslands on gabbro-derived soils in the southern Kruger National Park. It is not known whether soil properties in the grasslands affect tree establishment. As a first step in identifying soil... -
The chemistry of the pedoderm – part 3: Colophospermum mopane shrublands and woodlands in the central Kruger National Park, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Anthony J Mills --- , South Africa Tercia Strydom --- , South Africa Jessica L Allen --- , South Africa Julia Baum --- ,The woody plant, Colophospermum mopane, occurs as either a shrub or tree in shrublands and woodlands, respectively, in the central Kruger National Park, South Africa. As a first step in identifying which soil properties potentially influence the structure of C... -
Breeding status of invasive Rose-ringed Parakeets Psittacula krameri in Durban, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Tinyiko C Shivambu --- University of KwaZulu-Natal, South Africa Ndivhuwo Shivambu --- University of KwaZulu-Natal, South Africa Colleen T Downs --- University of KwaZulu-Natal, South AfricaThe Rose-ringed Parakeet Psittacula krameri has established feral populations in South African suburban areas. However, the information on the breeding biology of parakeets remains poorly documented in the country. We assessed parakeets’ breeding status and behaviour by locating their roost... -
Premature sperm ejaculation in captive African brown house snake Lamprophis fuliginosus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: AnthonyJ. Wilmes --- Saint Louis University, USA DustinS. Siegel --- Saint Louis University, USA RobertD. Aldridge --- Saint Louis University, USAMany ophidians exhibit prolonged copulation, a behaviour hypothesised to be the result of a slow and gradual ejaculation process or a behaviour aimed toward reducing sperm competition (male mate guarding). While observing courtship behaviour in a captive colony of the... -
The influence of grass competition and soil moisture on the growth and phenology of Karoo shrubs in the Eastern Upper Karoo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lisa Hebbelmann --- , South Africa Timothy G O’Connor --- , South Africa Justin CO du Toit --- Grootfontein Agricultural Development Institute, South AfricaRainfall in the Nama-Karoo is sporadic and a plant’s ability to access and utilise available soil moisture will determine its ability to persist in the system and to successfully recruit. When summer rainfall in the Eastern Karoo increases, grassiness increases... -
The efficiency of cassava–Bambara groundnut intercropping according to the sowing date of cassava
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Kouakou M Konan --- University Nangui Abrogoua, Côte d’Ivoire Kouadio I Kouassi --- University Nangui Abrogoua, Côte d’Ivoire Becket S Bonny --- University Nangui Abrogoua, Côte d’Ivoire Bi Tra S Doubi --- National Centre for Agronomic Research, Côte d’Ivoire Bi Irié A Zoro --- University Nangui Abrogoua, Côte d’Ivoire Dénezon O Dogbo --- University Nangui Abrogoua, Côte d’IvoireThe objective of this study was to propose a profitable cropping association date between cassava (Manihot esculenta) and Bambara groundnut (Vigna subterranea, also known as voandzou) through the examination of competition indices. The association of the cassava varieties Allada agba,... -
Influence of optimal room occupancy strategies on revenue maximisation during slack periods in selected 3- to 5-star hotels in Ghana
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: John Adanse --- School of Business, Economics and Tourism Management, Kenyatta University, Kenya Rosemarie Khayiya --- School of Business, Economics and Tourism Management, Kenyatta University, Kenya Vincent Maranga --- School of Business, Economics and Tourism Management, Kenyatta University, KenyaAn organisation’s inability to generate adequate income to sustain its business activities poses a significant challenge to maintaining profitability. Employing revenue-maximisation strategies is crucial to securing necessary resources and ensuring the continued success and stability of organisations. The purpose of... -
Integration of livestock into conservation agriculture systems in the Mediterranean climate region of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Pieter A Swanepoel --- Stellenbosch University, South Africa Hendrik PJ Smit --- Stellenbosch University, South AfricaWithin the Mediterranean climate region of South Africa, the livestock sector constitutes a substantial contributor to the regional economy. Livestock integration is prevalent in conservation agriculture systems in this region. Crop rotation involving small grains and canola is combined with... -
Yellow-billed Kite Milvus aegyptius nesting dynamics and breeding success across a human-modified landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Roger N Porter --- , William W Howells --- , Ingrid B Weiersbye --- , South Africa Ben Hoffman --- University of KwaZulu-Natal, South Africa Sean N Porter --- Oceanographic Research Institute (ORI), South AfricaAnthropogenic habitat transformation is one of the leading causes of biodiversity decline. Migratory birds, particularly many raptor species, are increasingly threatened by global environmental change. We investigated the nesting dynamics and potential determinants of breeding success in a population of... -
Aggressive interactions by invasive Common Mynas Acridotheres tristis with urban birds in Pretoria, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robyn Nelson --- University of Pretoria, South Africa Michael J Somers --- University of Pretoria, South AfricaWe conducted transect surveys in urban Pretoria, South Africa, to document interspecific interactions involving the invasive Common Myna Acridotheres tristis and coexisting species. During 90 standardised transect surveys across three suburban sites from April to August 2022 (outside the main...