LIFESCI 2D03 Lecture Notes - Lecture 24: Egg Incubation, Eragrostis Variabilis, Molecular Phylogenetics
12 Jan 2018
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Document Summary
Sexual conflict and environmental conditions affect the evolution of mating systems. Mating systems: description of the social associations and # of sexual partners an individual has during one breeding season: monogamy. 1f : 1m: fe(cid:373)ale"s part(cid:374)er provides high levels of resour(cid:272)es (high-quality territory/parental care) If sexual conflict does not exist because care from both parents is required: resource-poor environments, or when resources are difficult to obtain, polygyny. >1f : >1m: social associations vs none in promiscuity, rare but occurs in some social species mammals that defend a territory from other social groups (african lions, promiscuity. Species, populations, and individuals can exhibit tremendous variation in their mating systems. Evolutionary sexual conflict: the differential selection on males and females to maximize their fitness. Ecological ways in which resource limitation and distribution affects fitness benefits and costs for each sex. Male fitness strongly affected by the # of sexual partners. Comparative approach groups of related species that exhibit different mating systems.
