PSYCH 2TT3 Lecture Notes - Tuber, Nest Box, Sociobiology
Document Summary
Selfish gene approach to ethology the sociobiological notion that genes associated with behavior are the units upon which natural selection acts. Natural selection favours those genes that increase the expected relative reproductive success of their bearers from the genes perspective, that"s all that matters. Evolution of antipredator behaviour in guppies - low- and high- predation pools. Population structure of guppies is ideal to be studied: most studied are fish from trinidad and tobago. Low and high predation pools that empty into oceans. Guppies can be found upstream and downstream in waterfalls waterfall acts as a natural barrier to predators. High and low frequency streams can occur close to one another: very likely that these guppies share some ancestral data. Physical characteristics distinct between two populations: killfish. Once guppies reach a certain size, they are safe from killfish. Females invest more in each individual offspring to maximize chance of growth and survival: high predation sites close to ocen.