Biology 1001A Lecture Notes - Lecture 16: Robert Trivers, Reciprocal Altruism, Estrous Cycle
Social behaviour, the interactions that animals have with other members of their species, has profound effects on an individual"s reproductive success. In many species, the level of social interactions varies seasonally, usually reflecting the timing of reproduction, which, in turn, is influenced by changes in day length. African lions usually live in prides, one adult male with several females and their young. Males typically sire the young born to the females in their pride, achieving a high reproductive output. 47. 12b group living has its costs and benefits social behaviours. Ecological factors have a large impact on the reproductive benefits and costs of social living. Groups of cooperating predators frequently capture prey more effectively than they would on their own. Prey subject to intense predation may benefit from group defence. Living in groups can also be expensive; increased competition for food: communal living may facilitate the spread of contagious diseases and parasites.