Sociobiology and behavioural ecology

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What is the problem of altruism in species?
Can detriment the individual to benefit the group
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What example is given in the lecture?
A squirrel sounding alarm to warn others of predator
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What is the probability of gene sharing between a parent and offspring?
r=0.5
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Who suggested this and that it is easily calculated?
Krebs and Davies
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What may animals be?
Genotypically selfish
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What is an example of this?
Alarm calls are more frequent in badgers when is present
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What defines a species as being manipulative?
Tricking another species into being altruistic
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What is an example of this?
Brood parasites move one egg from another bird's nest and get their's raised for "free"
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What is mutualism?
Both participants gain survival/reproductive benefit
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What is an example of this?
The pied wagtail is territorial but may let satellite bird onto soil if benefit of reduced response time is higher than cost of reduced food
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When does reciprocal altruism occur?
Even when participants are not related to eachother
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Who suggested this?
Trivers 1971
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However, what could this lead to?
Cheating
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What is an example of this?
Bats may feed off another if unsuccessful, but stick to those familiar e.g. kin or roostmates
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What is Darwinian fitness?
Measure of genes passed on to next generation
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What is direct fitness?
individual reproduction
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What is indirect?
Reproduction of kin
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What is Hamilton's rule?
That the frequency of altruism will increase if the benefit is greater than fitness cost
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Other cards in this set

Card 2

Front

What example is given in the lecture?

Back

A squirrel sounding alarm to warn others of predator

Card 3

Front

What is the probability of gene sharing between a parent and offspring?

Back

Preview of the front of card 3

Card 4

Front

Who suggested this and that it is easily calculated?

Back

Preview of the front of card 4

Card 5

Front

What may animals be?

Back

Preview of the front of card 5
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