PSYCH 2TT3 Chapter Notes - Chapter 7: Parental Investment, Cichlid, Mate Choice
23 Dec 2014
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Female"s greater choosiness in mate selection should translate into greater variance in the reproductive success of males: natural selection will act against production of medium sized gametes if they are not very mobile compared to small gametes and don"t provide a great deal of resources to developing zygotes compared with large gametes. Direct benefits: a model of sexual selection that favours females that have a genetic predisposition to choose mates that provide them with resources that increase their fitness the choosier the female, the better, nuptial gifts: prey presented by members of one sex to members of the other sex during courtship. Males with large harems should have offspring that are more likely to survive: honest indicator: traits that are costly to produce are more difficult to fake and hence truly indicate the genetic quality of an individual, parasite resistance: females choose males with strong resistance to parasites (difficult to fake trait).
