NATR 320 Lecture Notes - Lecture 20: Nuptial Gift, Sexual Selection, Parental Investment
6 Oct 2020
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Document Summary
Mating behaviors reflect the cost and benefit of parental investment and mate defense. Sexual selection = a process in which individuals with certain characteristics gain an advantage over others of the same sex solely with respect to mating success. Females more likely to choose artificially elongated tails. Female moth things get spamataphores to shield their eggs. If a male can support costly and unwieldly ornaments, then they are more likely to be a vigorous individual with overall high genetic quality. Female"s future offspring will have good genes. The females receive indirect genetic benefits through her sons, who will themselves be attractive to females and produce many grandchildren. Have better eyesight than any insect or spider. Gamete size, parental care and ecological factors affect mating behavior. Females investing more into their offspring than males. This is why females are more choosy. Females lay eggs and males incubate the eggs and do all the parental care.
