Publications

cytauxzoon sylvicaprae gen. nov., spec. nov., a protozoon responsible for a hitherto undescribed disease in the duiker, sylvicapra grimmia (linné).		1948	18863433
right horn implantation in the common duiker.	in the common duiker, sylvicapra grimmia, implantation occurs only in the right uterine horn, but both ovaries ovulate.	1965	17747456
studies on plasmodium (vinckeia) cephalophi of the grey duiker (sylvicapra grimmia).		1966	5962467
nutritional studies on east african herbivores. 1. digestibilities of dry matter , crude fibre and crude protein in antelope, cattle and sheep.	1. a series of digestibility trials was done using four animals of each of the following species: friesian cattle (bos taurus), boran zebu cattle (bos indicus), corriedale sheep, fat-tailed sheep, eland (taurotragus oryx pallas), coke's hartebeest (alcelaphus buselaphus cokei günther), thomson's gazelle (gazella thomsonii günther) and bush duiker (sylvicapra grimmia l.). 2. two batches of pelleted food were prepared from ground maize cobs, cassava, whs (a-e) were prepared containing 65 (a)-135 ( ...	1975	1172929
nutritional studies on east african herbivores. 2. losses of nitrogen in the faeces.	1. a series of nitrogen-balance trials was done using groups of four animals of various species of wild and domesticated ruminants using pelleted diets (arman & hopcraft, 1975). 2. various herbivores were given grass or grass hays, legumes, herbs and shrubs. food and faecal samples were analysed for n. 3. with the pelleted diets, the n content of the faecal dry matter (dm) was low for eland (taurotragus oryx pallas), high for sheep and cattle (bos taurus and bos indicus) and intermediate for the ...	1975	1115763
evidence of a specific nidation site in ruminants.	the site of umbilical cord attachment in ruminants indicates the limited segment of the uterus where the blastocyst attachment occurs and could have potential significance for locating presumptive nidation sites. measurements of the site of cord attachment were made on impala (aepyceros melampus) and common duiker (sylvicapra grimmia) at several stages of gestation. both implant only in the right uterine horn although they ovulate from either ovary. relative to uterine length, cord attachment in ...	1977	596344
some helminth and arthropod parasites of the grey duiker, sylvicapra grimmia.	sixteen grey duikers were culled on the farm riekert 's laager in the central transvaal at irregular intervals from may 1979-march 1981. one trematode species, 3 cestode species and 16 nematode species were recovered from these animals. of these the following are new helminth records for this antelope: cooperia hungi , cooperia neitzi , cooperia pectinata , trichostrongylus axei, trichostrongylus colubriformis, trichostrongylus falculatus , trichostrongylus instabilis , impalaia tuberculata , ne ...	1983	6676685
parasites of south african wildlife. i. helminths of bushbuck, tragelaphus scriptus, and grey duiker, sylvicapra grimmia, from the weza state forest, natal.	thirteen bushbuck, tragelaphus scriptus, and 13 grey duikers, sylvicapra grimmia, were culled in the weza state forest, natal, from may 1983-may 1984. the maximum number of worms recovered from a single bushbuck was 393. of the total number of worms recovered from all the bushbuck, paracooperia devossi were the most numerous, followed by ostertagia harrisi, a cooperia sp. and haemonchus vegliai. p. devossi and o. harrisi were more numerous during winter and the cooperia sp. more numerous during ...	1987	3627728
a comparison of live and destructive sampling methods of determining the size of a parasitic tick populations.	the accuracy of a general and a specific method of collecting and counting ixodid ticks on live hosts was compared with that of a destructive technique which can only be applied to dead animals. destructive sampling provided considerably more accurate results than either of the live sampling methods when applied to domestic goats (capra hircus) and a duiker (sylvicapra grimmia). the smaller the life stage and the tick species the less likely it is that it will be recovered by either of the live ...	1987	3453335
mammalian pheromone studies, vii. identification of thiazole derivatives in the preorbital gland secretions of the grey duiker, sylvicapra grimmia, and the red duiker, cephalophus natalensis.	2-isobutyl-1,3-thiazole and its 4,5-dihydro derivative were identified in the preorbital gland secretions of the grey duiker, sylvicapra grimmia, and the red duiker, cephalophus natalensis, but are absent from the preorbital secretion of the blue duiker, c. monticola. these two compounds which are present in high, but varying concentrations in the secretions of male grey duikers, are present in low concentrations in the secretions of females. this seems to be the only consistent significant diff ...	1988	3245266
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 ...	1988	16726390
helminth parasites of grysbok, common duikers and angora and boer goats in the valley bushveld in the eastern cape province.	helminth parasites were collected from 13 grysbok, raphicerus melanotis, 12 common duikers, sylvicapra grimmia, 24 angora goats and 24 boer goats killed on a farm in valley bushveld in the eastern cape province. nematodes belonging to 9 species and a further 2 genera and cestodes belonging to 1 species and a further genus were recovered from the grysbok. of these, worms of the genus skrjabinema, trichostrongylus rugatus, trichostrongylus pietersei and nematodirus spathiger were the most prevalen ...	1989	2812700
parasites of domestic and wild animals in south africa. xxiv. arthropod parasites of bushbuck and common duiker in the weza state forest, natal.	one bushbuck, tragelaphus scriptus, and 1 common duiker, sylvicapra grimmia, were shot each month from may 1983 to may 1984 in the weza state forest, natal, i.e. a total of 13 animals of each species. the bushbuck were infested with 8 ixodid tick species, 2 louse species and a louse-fly species. the common duiker harboured 7 tick species and 2 louse species. ticks of the genus ixodes were the most numerous and prevalent on both antelope species, but no pattern of seasonal abundance was evident. ...	1989	2726195
mammalian pheromones viii chemical characterization of preorbital gland secretion of grey duiker,sylvicapra grimmia (artiodactyla: bovidae).	using gas chromatography-mass spectrometry 33 constituents of the preorbital gland of the grey duiker,sylvicapra grimmia, were identified as unbranched alkanes, 2-alkanones, alkanals, alkanoic acids, alkan-4-olides, as well as 3-methyl-3-buten-1-ol, (z)-9-octadecenoic acid, benzyl cyanide, diethyl sulfoxide, 2-isobutyl-1,3-thiazole, 2-isobutyl-4,5-dihydro-1,3-thiazole, and 3,4-epoxy-2-dodecanone. determination of the relative concentrations of these components in a limited number of secretion sa ...	1990	24263498
chromosomal evolution in duiker antelope (cephalophinae: bovidae): karyotype comparisons, fluorescence in situ hybridization, and rampant x chromosome variation.	fluorescence in situ hybridization (fish) and conventional banding techniques were used to identify patterns of similarity among the genomes of six species of antelope, subfamily cephalophinae. the g-banded euchromatic portions of the autosomes were invariable in all species; however, significant modifications of the x chromosomes were detected. two of the taxa, cephalophus maxwellii and c. monticola, were characterized by acrocentric x's, while x chromosome morphology varied from submetacentric ...	1996	8646878
pathobiochemical mechanisms involved in the control of the disease caused by trypanosoma congolense in african grey duiker (sylvicapra grimmia).	the course of trypanosoma congolense infections in african grey duiker (sylvicapra grimmia) and sheep and goats were studied. several parameters suggested that the grey duiker was much more resistant to trypanosomosis than sheep and goats. they showed increases in weight during infection, had a much longer pre-patent period, and their peak parasitaemia levels were about 100-fold lower than those of sheep and goats. parasites were no longer detected in grey duiker blood 35 days after infection. a ...	2001	11182235
serological survey of salmonellosis in grey duiker (sylvicapra grimmia) in asejire, irewole local government area, osun state, nigeria.	a serological survey of salmonellosis in grey duiker was carried out in asejire, irewole local government area (lga), osun state, between august and september, 1996. the sera of 50 animals were screened for antibodies to salmonella flagella (h) and/or somatic (o) antigens. ten "bushmeat" hawkers/processors were interviewed on their state of health. twenty-two (44%) and 3 (6%) had antibodies to the h and o antigens, respectively. nine (18%) had antibodies to both the h and o antigens. antibody ti ...	2001	14510164
a questionnaire survey of the management and use of anthelmintics in cattle and antelope in mixed farming systems in zimbabwe.	a survey of the management of mixed farming of cattle and antelope and use of anthelmintics was conducted on eleven farms between august and december 1999 by a self-administered questionnaire. seventeen antelope species ranging from grey duikers (sylvicapra grimmia) to eland (taurotragus oryx) occurred on the farms. impala (aepyceros melampus) was the most abundant antelope on the farms. seventy-five per cent of the antelope species on the farms were grazers and mixed feeders and shared grazing ...	2002	12240773
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 ...	2003	12825675
ixodid ticks of angora and boer goats, grysbok, common duikers, kudus and scrub hares in valley bushveld in the eastern cape province, south africa.	at monthly intervals from february 1983 to january 1984 two angora goats, two boer goats, one grysbok, raphicerus melanotis, one common duiker, sylvicapra grimmia, one greater kudu, tragelaphus strepsiceros, and four scrub hares, lepus saxatilis, were killed on a farm in valley bushveld in the eastern cape province, south africa and examined for ticks. seven ixodid tick species were collected, of which rhipicephalus glabroscutatum followed by amblyomma hebraeum and rhipicephalus oculatus were th ...	2003	12967172
myostatin rapid sequence evolution in ruminants predates domestication.	myostatin (gdf-8) is a negative regulator of skeletal muscle development. this gene has previously been implicated in the double muscling phenotype in mice and cattle. a systematic analysis of myostatin sequence evolution in ruminants was performed in a phylogenetic context. the myostatin coding sequence was determined from duiker (sylvicapra grimmia caffra), eland (taurotragus derbianus), gaur (bos gaurus), ibex (capra ibex), impala (aepyceros melampus rednilis), pronghorn (antilocapra american ...	2004	15522803
molecular characterization of theileria species associated with mortality in four species of african antelopes.	pathogen dna was isolated from roan antelope (hippotragus equinus), sable antelope (hippotragus niger), greater kudu (tragelaphus strepsiceros), and common gray duiker (sylvicapra grimmia) in south africa whose deaths were attributed to either theileriosis or cytauxzoonosis. we developed theileria species-specific probes used in combination with reverse line blot hybridization assays and identified three different species of theileria in four african antelope species. the close phylogenetic rela ...	2005	16333074
synthesis and antimicrobial activity of long-chain 3,4-epoxy-2-alkanones.	3,4-epoxy-2-dodecanone, a major component in the preorbital gland of the african grey duiker (sylvicapra grimmia), showed antimicrobial activity in preliminary tests. the c(11) to c(17) homologues of this compound were prepared and their activity against several pathogenic dermal bacteria and fungi was tested. 3,4-epoxy-2-dodecanone and 3,4-epoxy-2-tridecanone inhibited the growth of trichophyton mentagrophytes at 25 îg/ml. moderate inhibition of the growth of the bacteria propionibacterium acne ...	2010	21179314
titrating the cost of plant toxins against predators: a case study with common duikers, sylvicapra grimmia.	foragers face many variables that influence their food intake. these may include habitat structure, time, climate, resource characteristic, food quality, and plant defenses. i conducted foraging experiments using common duikers that involved: 1) testing the effect of plant toxins on foraging, and 2) titrating toxin intake against safety. i used giving up densities (guds, food remaining after foraging) to test for selection among trays containing alfalfa pellets treated with water, with 10% oxali ...	2015	26364293
dna sequence analyses reveal co-occurrence of novel haplotypes of fasciola gigantica with f. hepatica in south africa and zimbabwe.	the aim of this study was to identify and determine the genetic diversity of fasciola species in cattle from zimbabwe, the kwazulu-natal and mpumalanga provinces of south africa and selected wildlife hosts from zimbabwe. this was based on analysis of dna sequences of the nuclear ribosomal internal transcribed spacer (its1 and 2) and mitochondrial cytochrome oxidase 1 (co1) regions. the sample of 120 flukes was collected from livers of 57 cattle at 4 abattoirs in zimbabwe and 47 cattle at 6 abatt ...	2015	26476916
host-parasite list updating of ciliates and fermentation in the digestive tract of wild miscellaneous herbivores in south africa (rsa).	this article is dedicated to the author, burk dehority, who became very ill with cancer. fortunately he confirmed or corrected all identifications on ciliates in this article. this paper was 80% finished when he became ill. he unfortunately passed away in february 2016.	2017	28609902
novel predators and anthropogenic disturbance influence spatio-temporal distribution of forest antelope species.	understanding the effects of anthropogenic disturbance on species' behaviour is crucial for conservation planning, considering the extent of habitat loss. we investigated the influence of anthropogenic disturbances including agriculture, urbanisation, protected areas, and the presence of novel predators, on the temporal and spatial behaviour of sympatric forest antelope (tragelaphus scriptus, philantomba monticola, sylvicapra grimmia, and cephalophus natalensis) in an anthropogenic matrix contai ...	2019	30552995
a preliminary survey of medium and large-sized mammals from lebu natural protected forest, southwest showa, ethiopia.	this study was conducted to determine the species composition and diversity of medium and large-sized mammals from lebu natural protected forest, ethiopia. surveys were conducted to record mammals through direct observation and indirect evidence from three habitat types, namely: natural forest, bushland, and riverine forest. a total of 15 mammalian species were recorded. the species recorded were papio anubis, chlorocebus aethiops, tragelaphus scriptus, canis aureus, crocuta crocuta, panthera pa ...	2019	31832163