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Reconsidering the null hypothesis: Is maternal rank associated with birth sex ratios in primate groups?

12 Aug 2002

Abstract excerpt

Trivers and Willard hypothesized that vertebrates adaptively vary the sex ratio of their offspring in response to the mother's physical condition [Trivers, R. L. & Willard, D. (1973) Science 179, 90-92]. This hypothesis has produced considerable debate within evolutionary biology. Here we use meta-analysis techniques to evaluate claims that nonhuman primate females facultatively adjust the sex ratio of their...

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PMID: 12177424
DOI: 10.1073/pnas.162360599

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