Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-35151
Frère, C H; Krützen, M; Kopps, A M; Ward, Patrick; Mann, J; Sherwin, W B (2010). Inbreeding tolerance and fitness costs in wild bottlenose dolphins. Proceedings of the Royal Society B: Biological Sciences, 277(1694):2667-2673.
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In wild populations, inbreeding tolerance is expected to evolve where the cost of avoidance exceeds that of tolerance. We show that in a wild population of bottlenose dolphins found in East Shark Bay, Western Australia, levels of inbreeding are higher than expected by chance alone, and demonstrate that inbreeding is deleterious to female fitness in two independent ways. We found that inbred females, and females with inbred calves, have reduced fitness (lower calving success). We further show that one of the costs of inbreeding is extended weaning age, and that females’ earlier calves are more likely to be inbred. While the exact causes of inbreeding remain obscure, our results indicate that one factor is female age, and thus experience. Any inbreeding avoidance mechanisms such as female evasion of kin, or male dispersal, do not seem to be completely effective in this population, which supports the view that inbreeding avoidance does not always evolve wherever inbreeding incurs a cost.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Anthropological Institute and Museum|
|Dewey Decimal Classification:||300 Social sciences, sociology & anthropology|
|Deposited On:||21 Jul 2010 13:04|
|Last Modified:||05 Apr 2016 14:12|
|Publisher:||Royal Society of London|
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