Zobrazeno 1 - 10
of 89
pro vyhledávání: '"R. J. van Aarde"'
Autor:
R. J. van Aarde, Ashley Robson
Publikováno v:
Animal Conservation. 21:302-312
Supplementary Material: Appendix S1. Validating the accuracy of aerial survey location data. Appendix S2. Justification for the use of a static woody cover layer for assessing temporal variation in habitat selection. Appendix S3. Comparison of the ye
Autor:
R. J. van Aarde, Andrew Purdon
Publikováno v:
Journal of Arid Environments. 141:45-51
Water provisioning is a controversial yet common practice and its consequences for wildlife and vegetation have fuelled well-worn debates. Contradictory opinions exist on the effect of water provisioning on elephant abundance and distribution. Here,
Autor:
W.J. Van Der Colf, R. J. van Aarde
Publikováno v:
African Zoology; Vol 27, No 1 (1992); 11-13
Testosterone levels in plasma collected ait monthly intervals from 6 to 15 male South African hedgehogs (Atelerix frontalis) housed in captivity showed a marked seasonal pattern. Values were relatively low (< 0,25 ng/ml) from February to June but inc
Autor:
R. J. van Aarde, V. van Wyk
Publikováno v:
African Zoology; Vol 26, No 4 (1991); 188-192
The effects of GnRH stimulation on plasma testosterone and luteinizing hormone (LH) levels in Cape porcupine males were examined by analysing plasma collected before and after an intravenous injection of GnRH. In six mature males and one subadult, wh
Autor:
R. J. van Aarde, Morgan Jayne Trimble
Publikováno v:
Animal Conservation. 17:441-453
NSF Graduate Research Fellowship. Research grants to Richards Bay Minerals, the South African Department of Trade & Industry, and the National Research Foundation.
Publikováno v:
Diversity and Distributions. 20:322-333
Aim: Habitat selection is a behavioural mechanism by which animals attempt to maximize their inclusive fitness while balancing competing demands, such as finding food and rearing offspring while avoiding predation, in a heterogeneous and changing env
Publikováno v:
Biological Conservation. 164:98-106
Empirical models of habitat selection are increasingly used to guide and inform habitat-based management plans for wildlife species. However, habitat selection does not necessarily equate to habitat quality particularly if selection is maladaptive, s
Publikováno v:
Biological Conservation. 157:128-135
Managing multiple parks, reserves, and conservation areas collectively as conservation networks is a recent, yet growing trend. But in order for these networks to be ecologically viable, the functional connectivity of the landscape must be ensured. W
Publikováno v:
Ecography. 35:972-982
Support for this study was provide by Billiton, Conservation Foundation Zambia, Conservation International’s southern Africa’s Wildlife Programme, the Conservation Lower Zambezi, Duke University, the International Fund for Animal Welfare, the Moz
Autor:
R. J. van Aarde, K. D. Young
Publikováno v:
Biological Conservation. 144:876-885
Most conservation practitioners rely on experience-based information for management decisions. In South Africa, government policy thus directs managers to base decisions for elephant management on the best available scientific information. The relian