BIOLOGY 1M03 Lecture Notes - Lecture 22: Inclusive Fitness, Natural Selection, Parental Investment
15 May 2017
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Document Summary
Reduces an individuals personal welfare (cid:523)fitness(cid:524) but benefits the recipient"s. Natural selection will favor altruism when the benefits outweigh the costs. Inclusive fitness: direct + indirect: r= coefficient of relatedness, b= benefit to recipient of the behavior, c= cost to recipient, cost donors individual fitness. A vampire bat that is unsuccessful will find a successful bat and gets blood from them. The bat now owes the other one. Comes out to a benefit for both of the parties involved in the interaction. Intra-sexual selection: males compete for males, within the same gender, males are usually indiscriminate regarding mating, not picky, but aggressive. Inter-sexual selection: females choice, females are usually coy and choosy regarding mating. Females usually invest more in parental investment, reproductive success is limited by ability to raise offspring. Males reproductive success is limited by access to fertilizable eggs, males invest in mating effort.
