Kin Selection Flashcards
Eusocial insects on bottom of slide 3
Eusocial insects on bottom of slide 3
Direct fitness (# of offspring) plus equivalents gained through support (direct fitness + anything from close family members)
Inclusive fitness
A strategy that is the best response, given other participants responses. Whatever individual displays the best strategy cant be beaten
Nash equilibrium
BATS EXAMPLE ON 5
BATS EXAMPLE ON 5
Why is acting altruistically unstable?
If one member of the group decides not too, they are now the highest fitness and everyone else is left behind
Fitness when not helping - fitness when helping
Cost of helping
When do individuals act altruistically?
When c < r x b
Cost is less than relatedness multiplied by benefit to altruists relatives
Why does cooperative breeding not make sense from a Darwinian evolution standpoint?
Individuals should not act selfishly
When individuals cooperate in the care of young. There is reproductive division of labor, with sterile (or nearly sterile) workers assisting fecund individuals (a specific type of cooperative breeding)
Eusocial species
An action that reduces an individuals own fitness while increasing the fitness of another individual (never actually seen anywhere in biology)
Altruism
How are sisters related in a diploid case?
50% related
A strategy that, if established, cant be invaded by a rare mutant using an alternative strategy (a special case of Nash equilibrium)
Evolutionarily stable strategy (ESS)
Selection acting on individuals related through recent, common descent (direct offspring)
Kin selection
Fitness = direct fitness + (r x fitness effect on relatives)
or
Fitness = direct fitness + indirect fitness
Inclusive fitness (Hamilton’s rule)
Who are females more closely related to in a haplodiploid case?
They are more closely related to their sisters than their daughters
