Social Evolution Flashcards
1
Q
Why should individuals live in groups (6)
A
- clustering if appropriate habitat
- patchy resources
- mating aggregation
- protection from predators (safety in numbers)
- protection from predators(selfish herd)
- sharing info
2
Q
4 types of behaviour
A
- cooperation (makes sense)
- selfish (makes sense)
- altruistic (makes less sense)
- spite (makes no sense)
3
Q
Social altruism explained by kin selection
A
Total fitness = direct fitness + inclusive fitness
4
Q
Direct fitness
A
Individual reproductive success
5
Q
Inclusive fitness
A
Reproductive success of genetic relatives facilitated by an individuals actions
6
Q
Hamilton’s rule
A
Explains altruism Br-C>0 B=benefit to recipient r=relatedness C=cost actor
7
Q
Calculating relatedness
A
Find how probable recipient gets a same allele as actor
1/2 multiplied by how many separations there are, if there are multiple arrow links from the actor add them together
8
Q
What is needed for spite
A
Relation less than zero, possible when it’s done in comparison to r of average individual
9
Q
Fitness adv of spite in bacteria
A
Explodes itself which improves overall fitness of its species cause it kills less related one
