ANT211H5 Lecture Notes - Lecture 5: Parental Investment, Amotz Zahavi, Mating System
Document Summary
Outmaneuver or drive away other members of the same sex. Attract members of the opposite sex reflected indirect or direct competition. Tends to be more confrontational & intense than females. More susceptible to early mortality during reproduction. Advantage that certain individuals have over other individuals of the. Model to explain earlier male mortality: success of male reproductive effort, dependent on the reproductive effort of male competitors. Dependent on her own effort & less upon the effort expended by other females. Cost of male reproductive effort: direct, indirect. Different reproductive strategies: males greater competitiveness, means greater risks (especially, selection for intense male mating effort leading to greater in young males) dissolution, death, disease. Coolidge effect: males are often re-aroused by novel females, as new reproductive opportunities, male"s reproductive output is limited by his access to fertile, males are not limited so much by their physiology, as by their females competitors. Charles brown-sequard (1889: injected himself with gineapig testicles.
