11:216:269 Lecture Notes - Lecture 2: Nikolaas Tinbergen, Karl Von Frisch, Konrad Lorenz
17 Sep 2017
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Fitness: has a survival value; also known as reproductive success . 2: behaviour: ultimate and proximate causation: example: if black-headed gull doesn"t remove broken egg shells: reproductive success will, comparative methods: compare whether closely-related animals have the same behaviour. Kittiwakes [related to black-headed gull]: doesn"t remove eggshells because they decrease because it will attract predators and decreased offspring survival ( example: nest on cliffs and there are less predators there) Montana, specifically feather coloration trait: why is the male finch red, what is the proximate cause of plumage color? , male and female have different foraging behaviours, experiment: wild-captured immature males & females (both gray) Gave males & females unlimited carotenoid-containing food plumage; identical. Gave males & females unlimited non-carotenoid containing food. 2 red males, other is covered with baby powder. Increased r. s: cost: can"t attract female no r. s, benefit: males survived do not attract yellow fly increased r. s. c)
