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The influence of primary production on a raptor community in Hwange National Park, Zimbabwe

Published online by Cambridge University Press:  10 July 2009

K. Hustler  and
W. W. Howells
K. Hustler
Affiliation:
Hwange National Park, Private Bag DT 5776Dete, Zimbabwe
W. W. Howells
Affiliation:
Hwange National Park, Private Bag DT 5776Dete, Zimbabwe
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Abstract

We studied the breeding success and distribution of three species of eagles, four species of vultures and one species of eagle owl on two areas of differing primary productivity from 1973 to 1984. Densities of all species were lower in areas with lower productivity. Breed-ing success on both biomes was similar, the lower densities of birds on the least productive biome apparently compensating for the lower productivity. Eagles produced more one-egg clutches, laid later and reared fewer young in the period of poor rainfall, probably as a result of reduced productivity. Vulture data were difficult to interpret because abundant food at breed-ing time was created by ungulate population management throughout the entire study period. Concentrations of all species on the more productive biome, and solitary breeding on the least productive biome by a normally colonially breeding species, suggests that primary production also influences vulture densities and perhaps breeding success.

Keywords

Afrotropicsbreeding successeagle owleaglesnesting densitiesprimary productionrainfallvultures
Type
Research Article
Information
Journal of Tropical Ecology , Volume 6 , Issue 3 , August 1990 , pp. 343 - 354
Copyright
Copyright © Cambridge University Press 1990

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References

LITERATURE CITED

Anthony, A. J. 1976. The breeding biology of the Lappet-faced Vulture Torgos tracheliotus (Forster) in the Gonarezhou National Park, Rhodesia. Certificate in Field Ecology Thesis, University of Rhodesia.Google Scholar
Bell, R. H. V. 1982. The effect of soil nutrient availability on community structure in African ecosystems. Pp. 193–216 in Huntley, B. J. & Walker, B. H. (eds). Ecology of tropical savannas. Springer Verlag, Berlin.CrossRefGoogle Scholar
Gargett, V. 1975. The spacing of Black Eagles in the Matopos, Rhodesia. Ostrich 46:1–44.CrossRefGoogle Scholar
Houston, D. C. 1974. The role of griffon vultures Gyps africanus and Gyps ruppellii as scavengers. Journal of Zoology (London) 172:35–46.CrossRefGoogle Scholar
Howells, W. W. & Hustler, C. W. 1984. The status and breeding success of eagles and vultures in the Hwange National Park, Zimbabwe. Proceedings Second Symposium African Predatory Birds: 99–107.Google Scholar
Hustler, K. 1986. A revised checklist of the birds of the Hwange National Park. Honeyguide 32:68–87.Google Scholar
Hustler, K. & Howells, W. W. 1986. A population study of Tawny Eagles in the Hwange National Park, Zimbabwe. Ostrich 57:101–106.CrossRefGoogle Scholar
Hustler, K. & Howells, W. W. 1987. Breeding periodicity, productivity and conservation of the Martial Eagle. Ostrich 58:135–138.CrossRefGoogle Scholar
Hustler, K. & Howells, W. W. 1988a. Breeding biology of the White-headed Vulture in Hwange National Park, Zimbabwe. Ostrich 59:21–24.CrossRefGoogle Scholar
Hustler, K. & Howells, W. W. 1988b. The effect of primary production on breeding success and habitat selection in the African Hawk Eagle. Condor 90:583–587.CrossRefGoogle Scholar
Hustler, K. & Howells, W. W. 1988c. Breeding biology of the Hooded and Lappet-faced Vultures in the Hwange National Park, Zimbabwe. Honeyguide 34:109–115.Google Scholar
Hustler, K. & Howells, W. W. 1989. Habitat preference, breeding success and the effect of primary productivity on Tawny Eagles Aquila rapax in the tropics. Ibis 131:33–40.CrossRefGoogle Scholar
Irwin, M. P. S. 1981. The birds of Zimbabwe. Quest, Harare.Google Scholar
Kemp, A. C. & Calburn, S. 1987. The owls of southern Africa. Struik Winchester, Cape Town.Google Scholar
Mundy, P. J. 1982. The comparative biology of southern African vultures. Vulture Study Group, Johannesburg.Google Scholar
Newton, I. 1979. Population ecology of raptors. T. & A. D. Poyser, Berkhamsted.Google Scholar
Newton, I., Marquiss, M., Weir, D. M. & Moss, D. 1977. Spacing of Sparrowhawk nesting territories. Journal of Animal Ecology 46:425–441.CrossRefGoogle Scholar
Pennycuick, P. J. 1976. Breeding of the lappet-faced and white-headed vultures (Torgos tracheliotus Forster and Trigonoceps occipitalis Burchell) on the Serengeti Plains, Tanzania. East African Wildlife Journal 14:67–84.CrossRefGoogle Scholar
Ricklefs, R. E. 1979. Ecology. Nelson, Middlesex.Google Scholar
Rutherford, M. C. 1978. Primary production ecology in southern Africa. Pp. 623–659 in Werger, M. (ed.). Biogeography and ecology of southern Africa. Vol. 1. W. Junk, The Hague.Google Scholar
Smithers, R. H. N. 1983. The Mammals of the southern African Subregion. University of Pretoria, Pretoria.Google Scholar
Steyn, P. 1982. The birds of prey of southern Africa. David Philip, Cape Town.Google Scholar
Tarboton, W. R. 1980. Avian biomass in some Transvaal woodlands. Proceedings 4th Pan-African Ornithological Congress; 113–143.Google Scholar
Tarboton, W. R. & Allan, D. G. 1984. The status and conservation of the birds of prey of the Transvaal. Transvaal Museum Monograph 3:1–115.Google Scholar
Vernon, C. J. 1979. Prey remains from seven Tawny Eagle nests. Honeyguide 100:22–24.Google Scholar