LIFESCI 3F03 Chapter Notes - Chapter 3: Cuckold, Desertion, Inbreeding
11 Jan 2017
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Availa(cid:271)le online at m(cid:272)master"s li(cid:271)rary as a (cid:272)hapter in the e-book: trivers, r. l. (2002) Natural selection and social theory: selected papers of robert l. trivers. (evolution and. The relative parental investment of the sexes in their young is the key variable controlling the operation of sexual selection. Where one sex invests considerably more than the other, members of the latter will compete among themselves to mate with members of the former. Where investment is equal, sexual selection should operate similarly on the two sexes. The pattern of relative parental investment in species today seems strongly influenced by the early evolutionary differentiation into mobile sex cells fertilizing immobile ones, and sexual selection acts to mold the pattern of relative parental investment. The time sequence of parental investment analyzed by sex is an important parameter affecting species in which both sexes invest considerable parental care: the individual initially investing more (usually the female) is vulnerable to desertion.
