Publications

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the helminth parasites of various artiodactylids from some south african nature reserves.the helminth species composition and helminth burdens of 4 grey duikers, 12 bushbuck, 2 nyala, 2 giraffe, a steenbok, an oribi, a waterbuck and a tsessebe from the kruger national park (knp); of a steenbok and a greater kudu from the farm riekerts laager, transvaal; of a single blue duiker from the tsitsikama forest national park, and of a blue wildebeest, a red hartebeest, a gemsbok and 2 springbok from the kalahari gemsbok national park (kgnp) were collected, counted and identified. new parasi ...19863725333
the use of haloperidol as a long-acting neuroleptic in game capture operations.haloperidol (r1625, serenace) a potent, long-acting butyrophenone neuroleptic, was shown to be very effective in game capture operations for the neuroleptization of several species of african wild herbivores, especially the medium and small antelopes. with a rapid onset of action following intravenous injection and a duration of action of 10-12 h in the majority of cases, haloperidol produced profound pyschomotor effects and remarkable tractability in red hartebeest, blesbok, springbok, duiker, ...19816122740
duinefontein 2: an acheulean site in the western cape province of south africa.excavations at duinefontein (dft) 2 near cape town, south africa have recovered numerous stone artefacts and animal bones on an ancient surface sealed within iron-stained eolian sands. u-series analysis of an overlying calcrete places the sands before 150 ka ago, while the large mammal taxa imply an age between 400 and 200 ka ago. the artefacts include a classic acheulean handaxe and probable biface shaping flakes that support this age estimate. the principal mammalian species are long-horned bu ...199910444350
studies on the genus setaria viborg, 1795 in south africa. ii. setaria scalprum (von linstow, 1908) and setaria saegeri (le van hoa, 1961).setaria scalprum (von linstow, 1908) and setaria saegeri (le van hoa, 1961) are closely related filarid species that occur in the smaller antelope of africa. material previously collected from common dulker, sylvicapra grimmia, steenbok, raphicerus campestris and grysbok, raphicerus melanotis, from several localities in the northern and eastern regions of south africa was re-examined and measurements of adult worms were compared with those given in the original descriptions of the species. scann ...200312825675
comparative histology of antelope placentomes.the histological structure of ruminant (family: bovidae) placentomes in eight antelope species was compared to that of domestic cattle and sheep. the chorioallantoic villi differed in degree of branching, surface corrugation, and complexity of utero-placental junction. all species had the epitheliochorial type of placenta, with the epithelial lining of maternal caruncular crypts varying between cellular and syncytial types. uganda kob (kobus kob, reduncinae) and common duiker (sylvicapra grimmia ...198816726390
ticks (acari: ixodidae) of small antelopes: steenbok, raphicerus campestris and suni, neotragus moschatus.during surveys on the tick burdens of various wildlife species in south africa, nine small antelopes became available for study. six of these were steenbok, raphicerus campestris and three sunis, neotragus moschatus, and their tick burdens are recorded here. the steenbok were examined in three nature reserves and harboured nine tick species. the sunis were examined in a fourth reserve and were infested with eight species. the steenbok and sunis were generally infested with the immature stages of ...200617058446
the conflict between cheetahs and humans on namibian farmland elucidated by stable isotope diet analysis.large areas of namibia are covered by farmland, which is also used by game and predator species. because it can cause conflicts with farmers when predators, such as cheetahs (acinonyx jubatus), hunt livestock, we assessed whether livestock constitutes a significant part of the cheetah diet by analysing the stable isotope composition of blood and tissue samples of cheetahs and their potential prey species. according to isotopic similarities, we defined three isotopic categories of potential prey: ...201425162403
home range - body mass relations: a field study on african browsing ruminants.home range data were collected concurrently from four syntopic browsing ruminant species in a conserved savanna ecosystem. mean home range areas were: giraffe (giraffa camelopardalis) 282 km(2); kudu (tragelaphus strepsiceros) 21.9 km(2); impala (aepyceros melampus) 5.82 km(2); steenbok (raphicerus campestris) 0.62 km(2). home range area (a hr) scaled on body mass (m) as: a hr=0.024 m (1.38) (r (2)=0.99).199028312570
trichostrongylus auriculatus n. sp. (nematoda: trichostrongylidae) from the steenbok, raphicerus campestris (thunberg, 1811).during a pilot survey of the parasites of some artiodactylids in the kalahari gemsbok national park a new species of trichostrongylus looss, 1905 was recovered from the small intestine of a steenbok, raphicerus campestris (thunberg, 1811), a gemsbok, oryx gazella (linnaeus, 1758), and a red hartebeest, alcelaphus buselaphus (pallas, 1766). the male spicules were 0,120-0,148 mm long and an ear-shaped protuberance was present on the shaft of the left spicule. the presence of only a single protuber ...19863796947
uncertain links in host-parasite networks: lessons for parasite transmission in a multi-host system.for many parasites, the full set of hosts that are susceptible to infection is not known, and this could lead to a bias in estimates of transmission. we used counts of individual adult parasites from historical parasitology studies in southern africa to map a bipartite network of the nematode parasites of herbivore hosts that occur in botswana. bipartite networks are used in community ecology to represent interactions across trophic levels. we used a bayesian hierarchical model to predict the fu ...201728289262
modeling elephant-mediated cascading effects of water point closure.wildlife management to reduce the impact of wildlife on their habitat can be done in several ways, among which removing animals (by either culling or translocation) is most often used. there are, however, alternative ways to control wildlife densities, such as opening or closing water points. the effects of these alternatives are poorly studied. in this paper, we focus on manipulating large herbivores through the closure of water points (wps). removal of artificial wps has been suggested in orde ...201526263663
buffalo, bush meat, and the zoonotic threat of brucellosis in botswana.brucellosis is a zoonotic disease of global importance infecting humans, domestic animals, and wildlife. little is known about the epidemiology and persistence of brucellosis in wildlife in southern africa, particularly in botswana.201222412932
colonic absorption and secretion of fluids, electrolytes and organic acids in east african wild ruminants.in sixteen species of wild ruminants colonic absorption of fluids averaged 48% of the fluids entering the large bowel. values ranged from 26% (steenbok) to 65% (gerenuk). absorption of sodium, potassium, chloride and organic acids were variable between species. colonic absorption of potassium ions were found to be related to diet selection and body weight of the animals. colonic absorption of volatile fatty acids were significantly greater in browsers (28.4 mmol/l) than grazers (9.6 mmol/l). the ...19846141031
investigating the effects of management practice on mammalian co-occurrence along the west coast of south africa.the subtle and cascading effects (e.g., altered interspecific interactions) that anthropogenic stressors have on local ecological assemblages often go unnoticed but are concerning given their importance in ecosystem function. for example, elimination of buffalo from the serengeti national park is suggested to have driven increased abundance of smaller antelope as a result of release from competition. the perceived low abundance of small antelope in the contractual postberg section of the west co ...202032025364
perineal urethrostomy to treat obstructive urolithiasis in a captive hand-raised steenbok (<i>raphicerus campestris</i>).the steenbok (raphicerus campestris) is a small antelope of the family bovidae native to the african continent. urolithiasis, the formation of urinary calculi in the urinary tract, can be caused by a variety of factors such as diet, dehydration, infection and anatomical predisposition. urolithiasis, with uroliths identified as magnesium calcium phosphate carbonate in composition, was diagnosed in a hand-reared 5-month-old steenbok. perineal urethrostomy was performed as a component of the broad ...201729227142
tannins and digestibility in the steenbok (raphicerus campestris).1. the influence of tannins on the digestion of a small ruminant was investigated. 2. a 1% tannic acid diet was compared with a normal diet. 3. the digestion of protein decreased by 7.04%, fibre by 9.77% and energy utilization decreased by 7.94%. 4. tannic acid has a marked depressing effect on the digestibility of the steenbok.19882906833
suspected cerebrocortical necrosis in the steenbok. 19854071945
the micromorphology of the apocrine glands of the intermandibular region of the steenbok (raphicerus campestris).the histological structure of the newly-discovered intermandibular glandular region in male and female steenbok is described. this region consists of enlarged sebaceous and apocrine glands which secrete a substance used for demarcating grazing territories and for marking females. migratory lymphoid cells in the epithelium of the apocrine glands resemble langerhans cells of the epidermis and forestomach epithelium but do not contain langerhans cell granules. cells, which are probably of lymphoid ...1978714394
the micromorphology of the glands of the infra-orbital cutaneous sinus of the steenbok (raphicerus campestris).the infra-orbital cutaneous sinus produces a black secretion which is the combined secretion of melanaceous, branched, alveolar, sebaceous and enlarged, coiled apocrine glands. the micromorphology of these glands is described with special emphasis on the sebaceous glands and melanin transfer. the secretion, which may be used for unintentional territorial demarcation, is possibly produced as small black granules and is most likely important for short range communication.1978714393
preliminary report on the intermandibular cutaneous glandular area and the infraorbital gland of the steenbok.an intermandibular glandular area, never before described in any other ungulate has been found in the steenbok (raphicerus campestris). it consists of enlarged sebaceous and apocrine sweat glands situated in the upper two-thirds of the dermis. they produce a dirty white almost flaky odoriferous substance which clings to the hairs of the area and is easily rubbed off for marking territorial areas as well as for marking females during mating. the infraorbital gland produces a black secretion which ...19761263192
strobiloestrus clarkii (clark) reared for the first time from the african steenbok (raphicerus campestris (thunberg))(diptera: oestridae). 196514272962
[two new species of parasitic microfilaria of raphicerus campestris zuluensis roberts, 1946]. 195513327253
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