BIOL150 Lecture : Biol150 - Migration.pdf
11 Dec 2013
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Document Summary
Directional, intentional movement of a population associated with cyclic change in environment. Social process in which signal from one individual modifies behaviour of another individual. Communication system are controlled by natural selection to maximize benefits and minimize risks. Some animals can use misleading communication signals attract prey. However this only works if it is rare and very few animals can actually detect the liars. Put their eggs in another species" nest and makes them raise the birds. This way, they can produce more eggs instead of taking care. Doing something to benefit another individuals fitness, while decreasing your own fitness. Contrasts the idea that mutation decreasing fitness should remain in gene pool If br > c, altruism is favoured by natural selection. B - benefit to beneficiary r - how related they are. Helps relatives fitness, so it remains in gene pool. Indirect fitness - helping relative"s offspring, enhanced if relatives have babies.
