CAS AN 102 Lecture Notes - Lecture 13: Pair Bond, Mate Choice, F-Distribution

• School: Boston University
• Department: Anthropology
• Course: CAS AN 102
• Professor: James Schmidt

Document Summary

Factors influencing mating systems: males limited by distribution of ovulating females, how easy is it for males to monopolize & guard females, f distribution for habitat, receptivity (estrus, synchrony, mate choice, etc. ) Mechanisms for monogamy: want to ensure paternity certainty, fidelit(cid:455): (cid:449)ill (cid:271)e (cid:862)faithful(cid:863) i(cid:374) (cid:373)ate"s absence, jealousy: mate becomes more interested when a rival is around, maintain pair bond: duetting & grooming. Prairie voles: (cid:862)f(cid:396)ie(cid:374)dl(cid:455)(cid:863) app(cid:396)oa(cid:272)h to st(cid:396)a(cid:374)ge(cid:396)s as pote(cid:374)tial (cid:373)ates is p(cid:396)e(cid:396)e(cid:395)uisite to fo(cid:396)(cid:373)i(cid:374)g a pai(cid:396)- bond, once pair bond is est, all behavior to strangers is aggressive. Extra-pair copulations: socially monogamous individuals often copulate outside pair-bond, why, fertility insurance, maximize genetic diversity, good genes, incr. amount of direct benefits. Promiscuous mating systems: promiscuity: free for all, polyandry multiple males form pair bonds w/ multiple females. Ecology, evo, & polygyny: resources limit reproduction, males limited by availability of females.