ANT380H5 Lecture Notes - Lecture 8: Brain Size, Sexual Selection, Frequency-Dependent Selection
Document Summary
Questions: chimps have visible estrous, very difficult to impregnate, go for 5 years without any sexual activity, memory consolidation, nrem sleep vs. rem sleep. Male imperatives: mating with fertile females, killing infants they have not fathered. Female imperatives: avoid infanticide, avoid mating with relatives, mate with high quality males when most fertile. Females invest strongly in infants: gestation, 5 years of nursing, guarding, teaching. Sex for meat: males do most of the hunting, often gave meat to females in estrous and in return females would copulate with males who gave meat, number of estrous females will predict when males will hunt. 2: chimps have slow life history, grow very slowly at all stages of life. Precocial vs. altritial: precocial - mother invests very little when born, e. g. drosophila, altritial - mother invests a lot when offspring is born, without mother they will die, e. g. humans.
