Data from: Does male reproductive effort increase with age? Courtship in fiddler crabs

Catherine L. Hayes, Isobel Booksmythe, Michael D. Jennions, Patricia R. Y. Backwell, P. R. Y. Backwell, I. Booksmythe, C. L. Hayes & M. D. Jennions
Theory suggests that reproductive effort generally increases with age, but life history models indicate that other outcomes are possible. Empirical data are needed to quantify variation in actual age-dependence. Data are readily attainable for females (e.g. clutch/egg size), but not for males (e.g. courtship effort). To quantify male effort one must: (a) experimentally control for potential age-dependent changes in female presence; and, crucially, (b) distinguish between the likelihood of courtship being initiated, the display rate,...
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