A5083246928- Bird parasitology and diseases
- Avian ecology and behavior
- Vector-borne infectious diseases
- Ecology and Vegetation Dynamics Studies
- Animal Behavior and Reproduction
- Viral Infections and Vectors
- Livestock and Poultry Management
- Fish Ecology and Management Studies
- Wildlife Ecology and Conservation
- Animal Nutrition and Physiology
- Forest ecology and management
- Plant and animal studies
- Microbial infections and disease research
- Insect and Arachnid Ecology and Behavior
- Phytoplasmas and Hemiptera pathogens
- Amphibian and Reptile Biology
- Malaria Research and Control
- Coccidia and coccidiosis research
- Bacterial Infections and Vaccines
- Genetic diversity and population structure
- Transportation and Mobility Innovations
- Fecal contamination and water quality
- Animal Vocal Communication and Behavior
- Insects and Parasite Interactions
- Wildlife-Road Interactions and Conservation
UNSW Sydney
2023
University of Pretoria
1992-1995
Onderstepoort Veterinary Institute
1991-1993
Onderstepoort Veterinary Academic Hospital
1992-1993
National Museum
1986-1991
Forest Research
1983
University of KwaZulu-Natal
1980-1981
Two doves from the same aviary died following heavy infections with Haemoproteus columbae. Histopathological examination of various organs revealed numerous schizonts and megaloschizonts. There seemed to be two cycles schizogony, one within muscles another in a wide range tissues. The shape size appeared function site formation. rupture megaloschizonts, especially striated caused extensive fibre necrosis resultant muscle damage, is believed major cause mortality.
The species of Leucocytozoon recorded from four the five subfamilies Phasianidae are reviewed, using a series measurements and derived ratios not previously used for descriptions members this genus. Thirteen Phasianinae; L. caulleryi is considered to be member genus Akiba further while galli incertae sedis; remaining 11 species, peaolopesi valid, andrewsi synonym schoutedeni six viz. francolini, kerandeli, martini, mesnili, sabrazesi schuffneri, all synonyms macleani. Among guinea fowls...
An avian piroplasm, Babesia peircei sp. nov. is described from the jackass penguin Spheniscus demersus. Morphological differences between and other valid spp. are discussed together with possible vectors.
Summary Earlé, R. A. 1981. Factors governing avian breeding in Acacia savanna, Pietermaritzburg, Part 2: Intrinsic factors. Ostrich 52:74-83. The most important factor savanna is the body condition (protein reserve) of bird. Breeding can take place only if female has a large enough protein reserve to form eggs. dependent on an adequate food supply which once again climatic Both and weight several species were found be at their lowest towards end season. Moult largely separated time. In...
Summary Earlé R. A. 1986. The breeding biology of the South African Cliff Swallow. Ostrich 57: 138–156. Swallow Hirundo spilodera breeds in dense colonies usually under man-made concrete bridges. clutch size is 1–4 eggs but most 4-egg clutches are probably result conspecific brood parasitism. incubation period averages 14,6 days and fledling 24,1 days. Although only female has a featherless brood-patch, both males females incubate effectively. Nestlings reach maximum weight up to 31 g...
AbstractThe occurrence of Leucocytozoon tawaki is recorded from blood smears the jackass penguin Spheniscus demersus taken along South African coast. Illese records represent both first specimens this parasite as well since its description Fiordland crested Eudyptes pachyrhynchus in New Zealand 1976.Leucocytozoon gevind bloedsmere van brilpikkewyne langs die Suid-Afrikaanse kus. Hierdie eerste maal dat parasiet Afrika aangeteken en dit verteenwoordig ook rekord spesie sedert beskrywing...
Summary Earlé, R. A. 1981. Factors governing avian breeding in Acacia savanna, Pietermaritzburg, Part 3: Breeding success, recruitment and clutch size. Ostrich 52:235-243. The size success of eight species birds were monitored over a two year period savanna. mean fluctuated within the season four patterns variation noted. A smaller proportion large clutches laid 1979 when less food was available. higher dry but fewer attempts made overall thus lower. At peak season, mid-November, at its...
Summary Earlé, R. A. 1981. Factors governing avian breeding in Acacia savanna, Pietermaritzburg, Part 1: Extrinsic factors. Ostrich 52: 65–73. Birds bred mainly during the spring and early summer months (September—December) availability of food seems to be major factor influencing onset breeding. However, activities ceased before maximum supply became available. In 1979 fruit yield was high because good rains previous season so purely frugivorous birds started four weeks earlier than 1978....
Summary Kok, O. B. & Earle, R.A. 1990. Diet of the Black Korhaan Eupodotis afra in Orange Free State and North-west Cape. Ostrich 61: 107–110. Analysis 135 stomach samples Korhaans collected over a five year period showed this species to be omnivorous. More than two-thirds food items consisted animal matter, mostly arthropods, rest being plant material, seeds. Three insect taxa, Isoptera (almost exclusively Hodotermes mossambicus), Coleoptera (largely Curculionidae beetles) Orthoptera made...
Summary Earle, R.A. & Oatley, T.B. 1983. Populations, ecology and breeding of the Orange Thrush at two sites in eastern South Africa. Ostrich 54:205-212. The populations Turdus gurneyi studied represented races, nominate Natal disruptans Transvaal. In Transvaal there was a large influx individuals during winter but numbers stayed constant season with one pair/ha. birds were more sedentary. Food seemed to be major factor regulating population size both Olive T. olivaceus forest as number...
Summary Earle, R. A. 1983. Foraging overlap and morphological similarity among some arboreal insectivorous birds in an Eastern Transvaal forest. Ostrich 54:36-42. The foraging niches of eight common bird species were studied evergreen forest for 16 months. Three much larger than the remaining five (by 200%) not considered to be competition with smaller ones. This excluded Barthroated Apalis thoracica (< 12 g) Olive Bush Shake Telophorus olivaceus (30 as being competitors although both these...
Summary Oatley, T. B., Earl & R. A. Prins, J. 1989. Diet and foraging behaviour of the Ground Woodpecker. Ostrich 60: 75–84. The Woodpecker is highly specialized in its diet behaviour. It feeds preferentially on ants ant brood, 53 species 24 genera have been identified from 1885 faecal samples analysed. Eight contribute 95% food. Ants are not gleaned off surface but obtained by subsurface probing with woodpecker's sticky tongue. woodpeckers learn sites colonies within their territories....
The vocalizations of both adult and juvenile South African cliff swallows Hirundo spilodera are described. This swallow has a large vocal repertoire considering that it is highly colonial species, at least seven distinctive calls recognized. In chicks there gradual change in the food soliciting call develops into contact call. Contact birds were individually recognizable.