ANTHRO 7 Lecture Notes - Lecture 8: Estrous Cycle, Alternative Hypothesis, Phenotype
Document Summary
In species with strong contest competition, higher-ranking females do better than low-ranker in various components of reproductive success. Higher ranking female long-tailed macaques produce more offspring than low- rankers. Being in a smaller group (less feeding competition) also leades to greater reporductive success. More monkeys there are the less food per individual. Live in large groups for compensating benefits of predation. Higher-ranking female hanuman (gray) languers produce more surviving offspring. Low ranking females give birth less frequently. Higher ranking gets more food->more mile-> feed offspring which will enable survival. Offspring of higher-ranking female chimpanzees survive at higher rates and mature more quickly. One of many similar examples of kin bias: capuchin monkeys selectively groom and aid close kin. Coalitions: a solicitor seeks help from a joiner against a victim. Coalition will form certain body postures to intimidate the opponent by showing unitedness. Female-female aggressive coalitions are biased toward helping closer kin against more distant kin.
