BI308 Lecture 23: BI308 – lecture #23
Document Summary
Asymmetrical because the pay offs for males is not he same as the payoff"s for females. Essi when the pay off is better than deserting. For the female: the pay off is better than if she desert. P1 = portion survived when 1 parent care. Ess2 = male only care (stickle back strategy) arrow head converge at top right ** Doesn"t make up for the lost of fecundity male: wp1> wp0 (1+p) P1>p0(1+p) he gets more for caring than mating with multiple females and providing no care. Arrow head converge at bottom left *** female: wp1>wp0. By providing care she does better than trying to make lots of eggs with no care male: wp1(1+p) > wp2. The males gain more by deserting and mating with others than by sticking around. Sometimes the eggs and the nest can be an attractant, (it"s a cue) and it signals to other females tell them something about his care-providing abilities.
