Fig. 5: Spatial and temporal variation in ASR.
From: Adult sex ratios: causes of variation and implications for animal and human societies
Every social group may have different number of adult females (red circles) and males (blue circles). A group’s ASR will change as a result of deaths, maturations, emigrations and immigrations over time, and neighboring groups of a population often have different ASRs. Adults may move between groups, and local ASR may trigger these movements120,170. The average ASR may vary across populations of the same species. This variation also raises the questions whether the current local or the average long-term population- or species-specific ASR underly variation in social behavior and how animals perceive the relevant sex ratio.
