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McGill University
Biology (Sci)
BIOL 111
Irene Gregory- Eaves

29/11/11 Ecology: 1. Behavioural ecology: Study of animal behaviour in relation to the environment a. Ex Decide to eat? Factors like abundance, catchability, quality determine this b. Foraging theory: animals eating to maximize their energy intake, though there are things that limit that intake i. Fish/Daphnia: if there is low density of daphnia, fish will eat anything, if there is high density fish will eat more of the big ones ii. Bears should eat fish fresh fish to maximize their energy intake as new fish have more energy density than dead fish, but only where catching the fish is easy iii. Limitations: competition, predation risk, essential nutrients c. Ex. Altruism? Animals referentially help their kin because doing so increases the reproduction of alleles they both carry (“inclusive fitness”) i. Ex. Honey eater: only half reproduce, but other helps other in the colony (closest relatives) to do so. ii. Other possibilities: 1. group selection: even though you’re not related, it will help the group as a whole 2. reciprocal altruism: if you help someone, they may help ou back 3. punishment: one individual may be punished if altruism is not demonstrated 4.
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