CAS AN 263 Lecture Notes - Lecture 1: Concealed Ovulation, Estrous Cycle, Hylobates
26 Jul 2020
School
Department
Course
Professor
Document Summary
No tail (monkeys have tail, apes have tailbones). Shortened trunk (lower back is built for stability). Very flexible shoulder joint for suspensory adaptation - isn"t something that other mammals like cats have. Large brain to body size ratio - humans have exceptionally large brains. 2:1:2:3 dental formula (incisors, canines, premolars and molars). Hominoids are found only in asia and africa, orangutans are only in indonesia while chimpanzees, bonobos and gorillas are found only in africa. Very specialized locomotor adaptations - specialized in brachiations to swing from trees. They remain in contact with mates through singing, mainly monogamous. Males are black and females are white. Females are intolerant of unknown females - protective of mates. Dispersed social system - spend most of their time alone mothers raising offspring are the longest time they"re together. No signs of estrus - concealed ovulation. Flanged males are dominant - become flanged due to extreme male-male competition over mates.
