| mothers adjust offspring sex to match the quality of the rearing environment. | theory predicts that mothers should adjust offspring sex ratios when the expected fitness gains or rearing costs differ between sons and daughters. recent empirical work has linked biased offspring sex ratios to environmental quality via changes in relative maternal condition. it is unclear, however, whether females can manipulate offspring sex ratios in response to environmental quality alone (i.e. independent of maternal condition). we used a balanced within-female experimental design (i.e. fe ... | 2012 | 22859597 |