Birth sex ratio and social rank: consistency and variability within and between primate groups | Zendy

Gabriele Schino | Zendy

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Birth sex ratio and social rank: consistency and variability within and between primate groups

Author(s) -

Gabriele Schino

Publication year - 2004

Publication title -

behavioral ecology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.162

H-Index - 118

eISSN - 1465-7279

pISSN - 1045-2249

DOI - 10.1093/beheco/arh094

Subject(s) - biology , primate , sex ratio , sexual dimorphism , consistency (knowledge bases) , dominance (genetics) , rank (graph theory) , demography , zoology , ecology , mathematics , population , combinatorics , sociology , biochemistry , geometry , gene

Variations in birth sex ratios in primates are notoriously inconsistent and have been repeatedly suggested to be mainly owing to stochastic processes. An examination of temporal consistency within primate populations revealed that the effect of dominance rank on birth sex ratio tends to remains stable over time. Furthermore, a meta-analysis of published data on sex ratio variations in primates shows that although no overall effect was detectable, the relation between birth sex ratio and dominance rank was affected by level of resource availability and degree of sexual dimorphism. These results suggest that purely stochastic processes are unlikely to explain observed variations in primate birth sex ratios, and may explain why adaptive sex ratio variations in primates have been so difficult to demonstrate. Copyright 2004.maternal investment; meta-analysis; population growth; sexual dimorphism

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