Biology 1001A Chapter 47: Cycle 8
27 Oct 2017
School
Department
Course
Professor
Document Summary
Increases chances of succeeding at reproducing (cid:894)does(cid:374)"t ha(cid:448)e to (cid:449)ait to ha(cid:448)e his own offspring: females more productive in a pride, group living has its costs and benefits. Social behaviours: ecological factors impact reproductive benefits and costs of social living, groups of cooperating predators usually capture more effectively than on their own, prey subject to intense predation benefit from group defence. Costs: may facilitate the spread of contagious diseases and parasites. Costs: dominant animals must constantly defend status, dominants often have high levels of cortisol and other stress-related hormones in their blood compared with subordinates, elevated cortisol may induce high bp, disruption of sugar metabolism, and other pathological conditions. Subordinance benefits: gain protection from predators and experience by helping dominants raise young, can rise in a dominance hierarchy and avoid some side effects, many animals cannot survive on their own.
