BOESCH reading;

-concludes that when hunting is diff meat sharing must favor hunters to ensure group cohesion

when hunt is easy, hunt may be solitary, meat sharing is flexible

hunting among tai is not about kin selection but MUTUALISM

2 activities chimps cooperate for:

1. border patrols

2.  hunting

MALE SOC BONDING explntn for why chimps hunt;

mixed support

in ngogo and tai males give meat for allies, rank, and good hunters

MEAT for SEX explntn of why chimps hunt;

unsupported

males LESS likely to hunt when swollen fem around

ECOLOGICAL explntn of chimp hunting:

no support

chimp hunting is not affected by whether there is a shortage or surplus of other food around

vegetation in chimp hunting;

when less dense (ie forests vs jungles) vegetation, hunts are more likely and more succesfull

does chimp hunt depend on groups?

yes

there is a positive correlation between the n of male chimps and the liklihood of a hunt

COOPERATION:

joint action for mutual benefit

payoff per hunter is greater in group than it is alone.

t/f?

T

4 types of cooperation;

1. KIN SELECTION

preferentially sharing w kin

2.  RECIPROCITY

reciporocal or delayed exchange of benefits

3.  MUTUALISM

both actors benefit

4.  BY PRODUCT

no one benefits