Psychology 3228 Lecture Notes - Lecture 3: Courtship Display, Parthenogenesis, Mate Choice

• School: Western University
• Department: Psychology
• Course: Psychology 3228
• Professor: Caroline Strang

Document Summary

Psych 3328 lecture 3: natural selection fails to explain why males and females of many species differ so much, sexual selection concept way that the behaviour of each sex might affect the behaviour of the other. It(cid:859)s a sele(cid:272)ti(cid:448)e fo(cid:396)(cid:272)e: sexual selection applies to those characteristics that provide individuals w advantages in gaining access to mates, (cid:863)su(cid:396)(cid:448)i(cid:448)al of the se(cid:454)iest(cid:863) In pop w only cloning, all of them are going to be the same: stable versus unstable environments. If environment never changes, they"re good: but if change in environment occurs, theyre in trouble. Sexual selection: selection of traits relating to reproduction, rather than survival traditionally divided: intrasexual selection. Infanticide: females also engage in infanticide, wa(cid:374)t to eli(cid:373)i(cid:374)ate the (cid:374)eed fo(cid:396) fe(cid:373)ales to (cid:272)a(cid:396)e fo(cid:396) offsp(cid:396)i(cid:374)g that a(cid:396)e(cid:374)(cid:859)t. Mate choice criteria: material benefits, nuptial gifts e. g. , sexual cannibalism, female praying mantis eats the male that she mates with after they mate, to get nutritional resources, territory, sperm quality.