ANT211H5 Lecture Notes - Lecture 5: Bluegill, Erection, Coolidge Effect
Document Summary
Intrasexual competition: how males and females compete for. Advantage that certain individuals have over other individuals of the same. Outmaneuver or drive away other members of the same sex. Tends to be more confrontational & intense than females. Model to explain earlier male mortality: success of male reproductive efort, dependent on the reproductive efort of male competitors. Success of female reproductive efort: dependent on her own efort & less upon the efort expended by other females. Males greater competitiveness, means greater risks (especially in young males) Selection for intense male mating efort leading to greater dissolution, death, disease. Coolidge efect: males are often re-aroused by novel females, as new reproductive opportunities, male"s reproductive output is limited by his access to fertile females, males are not limited so much by their physiology, as by their competitors. Castration: atrophy of male reproductive organs, reduced penile erection, reduced orgasm, decline in aggression.
