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Chapter 7

ANT101H5 Chapter Notes - Chapter 7: Termite, Sexual Selection, Basal Metabolic Rate

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Sherry Fukuzawa

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Chapter 7
Behaviour shaped by evolutionary history of particular species, so if want to discover
underlying principles of behavioural evolution must identify that interactions between a
number of environmental and physiological variables
The evolution of behaviour
Behavioural ecology – based on assumption that all of the interconnected biological
components of ecological system (animals, plants, and microorganisms) evolved
together, which makes behaviour adaptations to environmental circumstances
Idea that behaviour evolved through natural selection
Behaviour constitutes a phenotype
Genes affect behaviour along with social structure
Some social factors that influence social structure
Body size
Basal metabolic rate (BMR)
Distribution of resources
Relationships with other non-predatory species
Dispersal ex. bachelor
Life histories ex. life expectancy
Activity patterns – ex nocturnal
Human activities
Why Be social?
Cost of competition offset by benefits of predator defense
Chances of escaping attacks greater for groups
Primate social behaviour
Dominance – reduce amount of actual physical violence, given priority and rarely give
way in confrontations
-Position in hierarchy is not permanent and changes throughout life
-Varies by – age, sex, level of aggression, time spent in group, intelligence, motivation
and mothers social position
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