LIFESCI 2D03 Lecture 26: Lecture 26
12 Jan 2018
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Document Summary
Polyandry may develop in 1) resource-poor habitats (f need to spend extensive time feeding to replenish energy for egg production), 2) evolution of high f fecundity (can lay more eggs a single. M can successfully raise: males become a limiting resource to f intense competition among f for mates. In many polyandrous species, predation of clutches is very high. The presence of social associations distinguishes polygynandry from promiscuity. Polygynandry (plural breeding) evolves when group defense of a territory is more effective than defense by a single individual. Breeding groups consist of several males and females that defend a large terr. Groups often challenged by rival groups, and larger groups are more successful. When costs of defense of mates/resources exceeds the benefit, and when there is no need for biparental care. Typically, uniparental care (f) or no parental care. Scramble competition indirect competition of individuals to find and secure copulations with multiple mates.
