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Spatially explicit poisoning risk affects survival rates of an obligate scavenger
Monadjem, A.; Kane, Adam; Botha, A.; Kelly, C.; Murn, C.
Obligate scavengers such as vultures provide critical ecosystem services and their populations have undergone severe declines in Asia and Africa. Intentional poisoning is a major threat to vultures in Africa, yet the impact on vulture populations of where poisoned carcasses are positioned is not known. We used re-sightings of 183 African white-backed vultures captured and tagged in two regions of South Africa, some 200 km apart, to estimate spatial differences in relative survival rates across life stages. Juvenile survival rates were similar in the two regions, whilst subadult and adult survival rates differed significantly. Using agent-based modelling, we show that this pattern of relative survival rates is consistent between regions that differ in intensity of poisoning, despite the proximity of the two regions. This may have important consequences for vulture conservation and the targeting of conservation efforts, particularly with regard to the efficacy of "vulture safe zones" around vulture breeding populations.
Keyword(s): Conservation biology; Population dynamics
Publication Date:
2018
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Citation(s): Monadjem, A., Kane, A, Botha, A., Kelly, C. and Murn, C. (2018) 'Spatially explicit poisoning risk affects survival rates of an obligate scavenger', Scientific Reports, 8(1), 4364 (11pp). doi: 10.1038/s41598-018-22632-y
Publisher(s): Nature Publishing Group
File Format(s): application/pdf
Related Link(s): https://www.nature.com/articles/s41598-018-22632-y
First Indexed: 2018-05-03 06:30:20 Last Updated: 2018-05-24 06:30:57