Publications

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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
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
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
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
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
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
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
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
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
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
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