Publications

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a comparison of the helminth communities in anas undulata, anas erythrorhyncha, anas capensis and anas smithii at barberspan, south africa.examination of the helminth communities in 25 yellow-billed ducks (anas undulata), 21 red-billed ducks (anas erythrorhyncha), ten cape teal (anas capensis) and seven cape shovellers (anas smithii) that had overwintered at barberspan, revealed differences in community structure. infracommunities in yellow-billed and red-billed ducks were characterized by low diversity and high eveness, and generally consisted of less than 100 helminths per duck. similarity values (mean percent similarity and mean ...19979467171
exploring the environmental drivers of waterfowl movement in arid landscapes using first-passage time analysis.the movement patterns of many southern african waterfowl are typified by nomadism, which is thought to be a response to unpredictable changes in resource distributions. nomadism and the related movement choices that waterfowl make in arid environments are, however, poorly understood. tracking multiple individuals across wide spatiotemporal gradients offers one approach to elucidating the cues and mechanisms underpinning movement decisions. we used first-passage time (fpt) to analyse high spatial ...201627042310
helminth fauna of anas undulata, anas erythrorhyncha, anas capensis and anas smithii at barberspan, south africa.thirty-four species of gastrointestinal helminths were found in 25 anas undulata, 21 anas erythrorhyncha, ten anas capensis and seven anas smithii collected at barberspan, south africa. excluding four new taxa, 11 new african records, and 14, 11, 12 and nine new host records were established for anas undulata, anas erythrorhyncha, anas capensis and anas smithii, respectively. the helminth community included 13 cosmopolitan species, seven species known only from the holarctic, one species known o ...19979352561
fimbriasacculus africanensis n. gen., n. sp. (cestoda: hymenolepididae) from anas capensis, anas undulata, and anas erythrorhyncha (anatidae) in south africa.fimbriasacculus africanensis n. gen., n. sp., occurred in anas capensis (50%), anas erythrorhyncha (5%), and anas undulata (12%) collected in the vicinity of the barberspan ornithological research station, republic of south africa. the new genus differs from others in the subfamily fimbriariinae (fimbriaria, fimbriarioides, fimbriariella, and profimbriaria) in having 2 testes per proglottid rather than 3, an accessory sac, and a preovarian instead of postovarian vitelline gland. fimbriasacculus ...19968973398
a preliminary report on the effects of parasitism by the leeches theromyzon cooperi and placobdella garoui on the physiology of the redbilled teal anas erythrorhyncha.the effects of parasitism by leeches theromyzon cooperi and placobdella garoui on the redbilled teal anas erythrorhyncha were investigated. leeches with initial body mass ranging from 5.2 to 28.4 mg were allowed to parasitize redbilled teal clamped in perspex containers. theromyzon cooperi increased its body mass after parasitism with a mean of 10.5-fold compared to 6.9-fold for p. garoui. changes were also observed in values of various haematological and biochemical variables of the redbilled t ...19862874937
some protozoan parasites of wild birds from the vicinity of onderstepoort.the protozoan parasites of wild birds from the vicinity of onderstepoort are recorded. new host records for the republic of south africa are: haemoproteus in threskiornis aethiopicus, francolinus swainsonii, columba guinea and streptopelia senegalensis; leucocytozoon in anas erythrorhyncha, netta erythrophthalma, c. guinea and passer domesticus and plasmodium in numida meleagris.1975810756
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