EE BIOL 100 Lecture 9: Lec 9 and 10 concept + examples

• School: UCLA
• Department: Ecology and Evolutionary Biology
• Course: EE BIOL 100
• Professor: Gorlitsky, L.E.Lipman, A.J.

Document Summary

Co(cid:374)sider the predator"s (cid:374)ature/target, a(cid:374)(cid:374)ual (cid:373)ortality rate for adults: low mortality -> minimize risk to themselves -> future chance to reproduce is high, high mortality -> minimize risk for offspring -> raise current brood. M never evolved parental care but f evolved 3 times independently in membracinae species. I(cid:374)itial f i(cid:374)(cid:448)est(cid:373)e(cid:374)t does(cid:374)"t (cid:373)ake it (cid:373)ore ad(cid:448)a(cid:374)tageous to (cid:272)o(cid:374)ti(cid:374)ue i(cid:374)(cid:448)esti(cid:374)g. Cost of parental care is usually lower for f than for m -> f more likely to raise offspring. Males are paternal if f fecundity/body size affected by parenting causes huge disadvantage: m grow slow, can maintain territory, attract mates -> m paternal. Either m/f can take care of offspring, depends on current conditions, clutch size, opp to mate again. M paternal if f is attracted to m w/ eggs in their care: sexual selection behavior. Eggs require low surface to volume ration, desiccation and lots of oxygen -> need parental care to accomplish this.