Biology 1002B Lecture Notes - Lecture 22: Isight, Eusociality, Haplodiploidy
3 Feb 2017
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Social behavior, the interactions that animals have with other (cid:373)e(cid:373)(cid:271)ers of their spe(cid:272)ies, has profou(cid:374)d effe(cid:272)ts o(cid:374) a(cid:374) i(cid:374)di(cid:448)idual"s reproductive success. This benefits the male because it increases the chance of his succeeding at reproducing: by hunting together, lions are more efficient foragers than when they hunt alone. Not all animals that live in a group are social: social animals usually live in groups characterized by some form of structure. May gain experience by helping dominant individuals raise young. By calculating the degree of relatedness, we can quantify the average percentage of alleles shared by relatives. If they share 0. 25 of their alleles, their degree of relatedness is 0. 25. Individuals should be more likely to help close relatives because in(cid:272)reasi(cid:374)g a (cid:272)lose relati(cid:448)e"s fit(cid:374)ess (cid:373)ea(cid:374)s that the i(cid:374)di(cid:448)idual is helpi(cid:374)g to propagate some of its own alleles. Altruism involves doing something that enhances the situation of another individual. Reciprocal altruism means that the deed done is expected to be repaid.
