BIOLOGY 1M03 Lecture Notes - Lecture 4: Kin Selection, Cooperative Breeding
3 Apr 2018
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How can evolution explain helping others: kin selection. Reciprocity: if the tness bene t to the recipient > the tness cost to the donor, both participants will gain if the help is reciprocated at a later date, if not reciprocated, help should be withheld in the future. Must have: bene t> cost, long term associations between donor & recipient, individual recognition, possible detection and punishment of cheating. Cant survive more than 3 days without feeding. Associate with kin & non-kin roost mates. Also regurgitate to non-kin that regurgitate to them. 4) possible detection and punishment of cheating. 1 for air different 1 for terrestrial. Unrelated animals will still warn others of issue. 2) high metabolic cost of the brain (20% of metabolic cost, 2. 5% of body weight) 1st brain size increase corresponds to increased meat consumption. Emergence of h. erectus and h. erg aster from austro ancestors. Greatest decrees in tooth size in human evolution.
