Lecture 22, Ch. 51

Lecture 22, Ch. 51 - ● Agonistic behavior ~ contest...

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Lecture #22 Date _____ Chapter 51 ~ Behavioral Biology
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Behavior Ethology ~ study of animal behavior Causation: •proximate ~ physiological & genetic mechanisms of behavior •ultimate ~ evolutionary significance of behavior Sign stimulus ~ external sensory stimulus Fixed action pattern (FAP)~ sequence of acts; unchangeable; carried to completion Ex : 3-spined stickleback (Tinbergen ‘73 Nobel) Supernormal stimulus
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Learning? Maturation~ behavior due to developing physiological changes Habituation~ loss of responsiveness to stimuli that convey no information; simple learning Imprinting~ limited learning within a specific time period •critical period (Lorenz, ‘73 Nobel) Associative learning: •classical conditioning~ Pavlov’s dogs •operant conditioning (trial and error)~ “Skinner’s box”
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Social behavior Sociobiology~ evolutionary theory applied to social behavior (Hamilton)
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Unformatted text preview: ● Agonistic behavior ~ contest behavior determining access to resources ● Dominance hierarchy ~ linear “pecking order” ● Territoriality ~ an area an individual defends excluding others ● Mating systems: •promiscuous ~ no strong pair bonds •monogamous ~ one male/one female •polygamous ~ one with many •polygyny ~ one male/many females •polyandry ~ one female/many males QuickTimeo and a Cinepak decompressor are needed to see this picture. Altruistic behavior ● Inclusive fitness ~ total effect an individual has on proliferating its genes by its own offspring and aid to close relatives ● Coefficient of relatedness ~ proportion of genes that are identical because of common ancestors ● Kin selection ~ aiding related individuals altruistically ● Reciprocal altruism ~ exchange of aid; humans?...
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This note was uploaded on 09/22/2009 for the course BIOL BIOL 51 taught by Professor Janetkoprivnikar during the Spring '08 term at Pacific.

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Lecture 22, Ch. 51 - ● Agonistic behavior ~ contest...

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