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Growth analysis of themeda triandra and sporobolus fimbriatus tillers in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region),Marked populations of Themeda triandra and Sporobolus fimbriatus tillers were sequentially harvested at fortnightly intervals both under irrigation and under unamended moisture conditions. Sampling covered a period from tiller initiation through to senescence after flowering. -
The influence of tiller age and time of year on the growth of Themeda tri andra and Sporobolus fimbriatus in semi‐arid grassveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region),Sequential growth measurements were made on successive populations of Themeda triandra and Sporobolus fimbriatus tillers initiated at different times of the year. The independent influences of tiller age and time of year on tiller growth were isolated by deriving growth... -
Morpho-physiological response of durum wheat genotypes to drought stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.F. Solomon --- Department of Plant Sciences, South Africa M.T. Labuschagne --- Department of Plant Sciences, South AfricaThe impact of moisture stress on phenology and growth varies for genotypes and the growth stages at which stress is encountered. The aim of this study was to determine the effect of moisture stress on some morpho-physiological traits of durum... -
DIGESTION OF MICROCYSTIS AERUGINOSA BY OREOCHROMIS MOSSAMBICUS
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: F.C. de Moor --- , South Africa W.E. Scott --- , South AfricaThe mean assimilation efficiency of aquarium acclimatized Oreochromis mossambiaue fed on a diet of Microcystis aeruginosa collected from Hartbeespoort Dam was determined as 50,8% for total organic matter, 63,7% for protein and 75,5% for phosphorus. Transmission electron microscopic examination of... -
The distribution of sweetveld and sourveld in South Africa's grassland biome in relation to environmental factors
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: W.N. Ellery --- Department of Geographical and Environmental Sciences, Republic of South Africa R.J. Scholes --- CSIR, Republic of South Africa M.C. Scholes --- Centre for African Ecology, Department of Botany, Republic of South AfricaThe distribution of sweet‐ and sourveld in relation to climate, parent material and soil nutrients has been examined in South Africa's grassland biome. Sourveld occurs in areas with high water supply and where parent material gives rise to soils with... -
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... -
Studying Issues Related to Industry and Technology: A Journey into Interdisciplinarity
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Manik Kher [d858024e18]No research can be perfect without an interdisciplinary approach, especially in studies related to industry, which is the most dynamic of all societal aspects. Industry is sensitive to socio-economic and political scenarios. The legal system also is not free from... -
Interpersonal conflict and meaning making in early adulthood: a self-regulation perspective
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karel F.H. Botha --- School for Psychosocial Behavioural Sciences, South AfricaThe aim of this study was to explore meaning making in response to interpersonal conflict in a group of young adults. A self-regulatory perspective was taken to explore and elaborate on current approaches to meaning making. Participants were 127 young... -
Digestive efficiency of indigenous and invasive avian species fed fruit of invasive alien plants in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Vuyisile Thabethe --- DST–NRF Centre for Invasion Biology, School of Life Sciences, University of KwaZulu-Natal, South Africa Amy-Leigh Wilson --- DST–NRF Centre for Invasion Biology, School of Life Sciences, University of KwaZulu-Natal, South Africa Lorinda A Hart --- DST–NRF Centre for Invasion Biology, School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- DST–NRF Centre for Invasion Biology, School of Life Sciences, University of KwaZulu-Natal, South AfricaMany highly invasive plant species produce fleshy fruit that are consumed and dispersed by frugivorous birds. However, little is known about assimilation efficiency of invasive fruit by indigenous and invasive avian species. We investigated whether indigenous Knysna (Tauraco corythaix) and... -
Digestive parameters and energy assimilation of Cape porcupine on economically important crops
Item type: Journal Article • Journal: African Zoology • Authors: Kerushka R Pillay --- School of Life Sciences, University of KwaZulu-Natal, South Africa Amy-Leigh Wilson --- School of Life Sciences, University of KwaZulu-Natal, South Africa Tharmalingam Ramesh --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaTo better understand how Cape porcupines are able to successfully occupy many agricultural lands, we studied their digestive parameters and energy assimilation when fed three economically important agricultural crops (potatoes [Solanum tuberosum], sweet potatoes [Ipomoea batatas] and butternut [Juglans cinerea])... -
Assimilation efficiency and gut passage time in an African elapid snake, Hemachatus haemachatus
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: GrahamJ. Alexander --- University of the Witwatersrand, South Africa ShirleyA. Hanrahan --- University of the Witwatersrand, South Africa Duncan Mitchell --- University of the Witwatersrand, South AfricaWe measured apparent assimilation efficiency (AAE) and gut passage time in the African elapid snake Hemachatus haemachatus under laboratory conditions. AAE was dependent on food type, being 89.8% when snakes were fed frogs and 82.8% when fed mice. Differences in...