ENVIRSCI 214 Lecture Notes - Lecture 10: Cooperative Breeding, Inclusive Fitness, Behavioral Ecology
18 Feb 2017
School
Department
Course
Professor
Document Summary
Understanding population growth models is optional in simbio. Social system: offspring receive care from their parents plus additional group members. (cid:862)helpers of the (cid:374)est(cid:863) so(cid:373)e adults (cid:272)are for you(cid:374)g that are(cid:374)"t their o(cid:449)(cid:374) offspri(cid:374)g. Helpers are (cid:373)ature (cid:271)ut do(cid:374)"t (cid:271)reed. (cid:862)s(cid:272)ru(cid:271) jays(cid:863) i(cid:374) florida are (cid:272)ooperati(cid:448)e (cid:271)reeders genetically monogamous pair- territories are limited and usually taken, so offspring unlikely to find vacancy. Direct benefits: increase the probability of breeding in the future via inheriting territory. Increase inclusive fitness by helping close kin inclusive fitness = direct fitness + indirect fitness direct fitness- benefits that improve the reproductive success of the actor indirect- benefits that improve the reproductive output of closely related individuals. White-fronted bee-eater may form cooperatively-breeding colonies by nesting in burrows in banks. When conditions are harsh, bee eaters are more likely to be helpers. Living in groups- a tradeoff between costs and benefits of social life.
