01:119:115 Lecture Notes - Lecture 19: Kin Selection, Mate Choice, Sexual Selection
15 Mar 2016
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Document Summary
Mating behavior and mate choice play a major role in determining reproductive success. Include seeking mates, choosing potential mates, competing for mates, caring for offspring. Mating relationships define several distinct mating systems that vary between species: promiscuous mating (no strong pair-bonding or lasting relationships, formation of more lasting relationships include: Monogamous mating (one male mating with one female) Polygamous mating (one individual mating with many) Sexual selection among polygamous species often results in sexual dimorphism. Sexual selection (form of natural selection): reproductive success is consequence of mating success. Intra-sexual selection (individuals of the same sex actively competing for mates) Inter-sexual selection (members of one sex choose mates on basis of certain traits) Typically assume behaviors are selfish but some appear to be unselfish or altruistic. One individual seems to behave in way that benefits others in groups rather than itself. William hamilton (1964) proposed that individuals help others that are not offspring because of inclusive fitness.
