BIOL2609_L7_2007

BIOL2609_L7_2007 - Molecular Ecology Lecture 7 Molecular...

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Molecular Ecology Lecture 7 Molecular insights on behaviour
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Behaviour Behavioural ecology – The function and evolution of animal behaviour (plants and microbes don’t ‘behave’!) – Behaviour impacts upon survival Eg: foraging, predator-avoidance – Behaviour can be strongly linked to reproductive success Eg: Sexual selection, altruism
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We will consider molecular aspects of reproduction-related behaviour – Monogamy and promiscuity – Male and female reproductive success – Sex ratio bias in offspring – Cooperative behaviour – Cheating tactics
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Monogamy and promiscuity Animals have 5 basic mating systems: Male bias? >1 >1 Promiscuity Male bias? >1 >1 Polygyandry Female bias 1 >1 Polyandry Male bias >1 1 Polygyny Polygamy none 1 1 Monogamy Direction of sexual selection Females Males
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