2 Coorporation Flashcards
altruistic interaction
interaction between 2+ individuals in which the fitness of the altruist is lowered, while the fitness of the beneficiary is increased
Group selection (4)
members of a group of altruists have higher fitness than members of a group of non-altruists
selection at level of groups of organisms, rather than individual
cheaters prosper in a group of altruists
weak form of selection
kin selection (3)
inclusive fitness
selective interaction among kin can promote the evolution of altruistic traits
caller passes on more genes of his/her kin survive
Hamilton’s Rule
Altruistic behaviors will be favored by selection of the costs of performing the behavior (c) are less than the benefits (b) discounted by coefficient of relatedness between actor and recipient (r)
br > c
Coefficient of relatedness
proportion of genes shared by 2 individuals through their common descent from 1 or both parents or further back in the line
requirement for kin selection
kin recognition
reciprocal alturism (2)
definition - a series of altruistic interactions between 2 individuals in which they alternate between roles of altruist and beneficiary
potential of cheating makes reciprocal altruism unstable, but when interactions are repeated, it can be stable
Primate cooperative behavior is …
diverse (alarm calls, grooming, defense, tolerance)
Cooperative hunting in Chimps:
Who hunts and prey?
Types (2)
Description and place for special type
All - males = red colobus monkey, females = duikers
individualistically in groups
cooperatively
systematic and coordinated, tai forest
How theories apply to humans? (3)
group selection is wide/non specific
kin selection - create artificial kin groups
(mismatch hypothesis)
indirect reciprocity
Human methods of facilitating cooperation and reducing free-riding (3)
Do Chimps do this?
gifts for cooperators
punishment
prosocial emotions
yes
