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Multi‐species wild herbivore systems vs. domestic single species systems: A comparison of net animal productivity
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.S. Goodman --- Mkuzi Game Reserve,Short and medium term net annual harvested animal production is compared for six areas situated in the semi‐arid bushveld of north eastern Natal. The landuse on these areas was conservation, commercial game ranching and commercial cattle ranching. The objectives of... -
Refinement of a model describing forage production, animal production and profitability as a function of bush density in the false thornveld of the eastern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- Department of Agriculture and Water Supply (Eastern Cape Region),An existing model describing the influence of Aeacia karroo density on forage production, animal production and profitability is reviewed and amended to introduce recent research results. -
Plant palatability assessment and its implications for plant‐herbivore relations
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Resource Ecology Group, Department of Zoology, S.M. Cooper --- Resource Ecology Group, Department of Zoology,An objective method used to assess the palatability of the foliage of woody plant species to kudus, impalas and goats is described. Observations were made on the feeding behaviour of tame animals in the Nylslvey Nature Reserve in northern Transvaal... -
Impact of goat browsing on Aloe ferox in a South African savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Breebaart R Bhikraj TG O'ConnorThe extent and impact of the utilisation of Aloe ferox by Boer goats during winter in a South African savanna was determined using a plant-based approach. All Aloe plants rooted within the transects were eaten by goats, with small plants... -
The coppicing ability of Acacia erubescens and Combretum apiculatum subsp. apiculatum in response to cutting
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G N SmitThe investigation was conducted in the Limpopo Province of South Africa. Twenty single stemmed trees of both Acacia erubescens and Combretum apiculatum subsp. apiculatum were randomly selected and five trees of each species were cut at heights of 5cm, 15cm,... -
Kudu foraging behaviour: influenced by animal density?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C van der WaalIn deciduous savanna a marked decline in browse availability characterises the late dry season and apparently regulates populations of large browser species such as kudu. The dry season utilisation patterns of two woody species, Acacia tortilis and Boscia albitrunca, in... -
Savanna browse production. 1: Determinants and measurement
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caryn A Penderis --- School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, South AfricaWith the rapid expansion of wildlife ranching and conservation in South African savannas and the resultant increase in multi-species grazing and browsing systems, information on browse production potential is essential for determination of carrying capacity. This study, conducted on three... -
Savanna browse production. 2: Prediction
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caryn A Penderis --- School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, South AfricaBrowsing herbivores are generally highly selective feeders, selecting for new shoots and young plant material. Determinations of browser carrying capacity are then greatly inflated when based on available browse biomass estimates. Our study was initiated with the aim of modelling... -
Induced chemical defences in Colophospermum mopane trees
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: DCJ Wessels C van der Waal WF de BoerA field experiment was conducted in which Mopane (Colophospermum mopane) trees were subjected to three different canopy treatments:felling of trees at a mean height of 0.7m above ground level, felling at a height of 2m, or pruning of selected branches... -
Diet selection of goats depends on season: roles of plant physical and chemical traits
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ntuthuko R Mkhize --- Agricultural Research Council–Animal Production Institute, South Africa Peter F Scogings --- Department of Agiculture, South Africa Ignatius V Nsahlai --- Animal and Poultry Science, South Africa Luthando E Dziba --- CSIR, Natural Resources and the Environment, South AfricaThis paper reports on diet selection of goats offered six browse species (i.e. Acacia natalitia [Vachellia natalitia], Acacia nilotica [Vachellia nilotica], Dichrostachys cinerea, Grewia occidentalis, Gymnosporia maranguensis and Scutia myrtina) commonly found in moist Zululand thornveld. The hypotheses tested were:... -
Effects of pruning on the concentration of secondary metabolites in Colophospermum mopane leaves
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rudzani A Makhado --- Department of Biodiversity, South Africa Martin J Potgieter --- Department of Biodiversity, South Africa Wilmien J Luus-Powell --- Department of Biodiversity, South AfricaColophospermum mopane, commonly known as mopane, produces secondary metabolites during the growing season. However, there is still insufficient knowledge on the quantity of secondary metabolites and the effect of browsers on the concentration of secondary metabolites. A pruning experiment was... -
A review of the responses of medium- to large-sized African mammals to fire
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Willem A Nieman --- , South Africa Brian W van Wilgen --- , South Africa Frans GT Radloff --- , South Africa Alison J Leslie --- , South AfricaAn improved understanding of how fire affects African mammals is important for the management of both fire regimes and mammal populations. The response of mammals (>5 kg) to fire was reviewed to identify habitat preferences, and to inform fire management...