Causes and consequences of adult sex ratio imbalance in a historical U.S. population.

ABSTRACT: The responsiveness of individuals to partner availability has been well-documented across the literature. However, there is disagreement regarding the direction of the consequences of sex ratio imbalance. Specifically, does an excess of males or females promote male-male mating competition? In an attempt to clarify the role of the adult sex ratio (ASR) on behaviour, here we evaluate both competing and complimentary expectations derived from theory across the social and biological sciences. We use data drawn from a historical, nineteenth century population in North America and target several life-history traits thought to be affected by partner availability: age at first birth, relationship status, completed fertility and longevity. Furthermore, we assess the role of various contributors to

SUBMITTER: Schacht R 

PROVIDER: S-EPMC5540856 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature