Psychology 2800 Lecture : PSYC 2850 - Human Sexuality - Class 2
12 Oct 2011
School
Department
Course
Document Summary
Sex education and sexual attitudes continued: sexual selection will be most intense as the potential for differential reproduction among males increases. In monogamous primates, males reproduce success is relatively similar, so sexual selection is not intense. In sex role reversed species, the opposite pattern holds true: male invest more in offspring and are choosy whereas, females compete intra-sexually for males: example: jacana. Why: investing in mating is costly, investing in offspring is costly, females sometimes compete intra-sexually for male mates. Why: males vary in their quality (example: moorhens, females can also court males, proceptive behaviours, actively looking for sex, receptive behaviours, example: chimpanzee. So that a male can ensure only his sperm is deposited with a female"s reproductive tract. January 26, 2011: post-copulatory competition often takes the form of male mate guarding (example: Sex differences in human mate preference: evolutionary hypotheses testing 37 cultures.
