ANT211H5 Lecture Notes - Lecture 4: Mating System, Lactation, Placentation
Document Summary
Understand the mechanisms of intrasexual selection a. competition early male mortality. Be able to describe the different mating systems a. polygamy i. polygyny ii. polyandry b. monogamy i. serial monogamy c. promiscuity. Understand how mating systems utilize different strategies in sexual selection. Understand the terms: bateman"s principle, reproductive variance, harem, socioeconomic sex ratio. Advantage that certain individuals have over other individuals of the same sex. Evolution of traits based on their ability to increase reproductive success. Same sex competition to gain access to fertile females. Compete with members of the same sex to attract mates. Sexual ornaments and courtship rituals as indicators of genetic quality and/or ability to provide resources for offspring. Tends to be more confrontational & intense than females. Male fitness depends on maximizing mating frequency. Male reproduction is limited not by their own physiology but by the behavior of other males. Greater male reproductive variance than females (i. e. greater range of reproductive success between males disenfranchised males)
