Inbreeding risk, avoidance and costs in a group-living primate, Cebus capucinus
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- 作者：Irene Godoy ; Linda Vigilant ; Susan E. Perry
- 刊名：Behavioral Ecology and Sociobiology
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：70
- 期：9
- 页码：1601-1611
- 全文大小：553 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Behavioural Sciences
Zoology - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-0762
- 卷排序：70
文摘
Documenting inbreeding and its potential costs in wild populations is a complicated matter. Early infant death before genetic samples can be collected limits the ability of researchers to measure fitness costs, and pedigree information is necessary to accurately estimate relatedness between breeding individuals. Using data from 25 years of research from the Lomas Barbudal Capuchin Monkey Project, and a sample of 109 females that have given birth, we find that despite frequent co-residency of adult opposite-sexed individuals, capuchins produce offspring with close kin (i.e., related at the half-sibling level or higher) less often than would be expected in the absence of inbreeding avoidance. We do not find support for alternative, non-behavioral explanations for this pattern and thus argue for mate choice. Furthermore, we find evidence for fitness costs among inbred animals in the form of delayed female age at first birth but not significantly higher juvenile mortality. Further research is necessary in order to determine the mechanisms by which individuals develop sexual aversion to close kin. Through a combination of demographic records, maternal pedigrees, and genetically determined paternity, this study provides a detailed study of inbreeding and inbreeding avoidance in a well-studied mammal population. This study provides (1) evidence that capuchin monkeys avoid mating with close kin at both the level of parent-offspring and half sibling and (2) evidence of fitness costs to inbreeding in the form of delayed first age at reproduction.KeywordsInbreeding avoidanceInbreeding depressionPrimatesCapuchin monkeys