The benefits of helping: direct and indirect Biologists divide the evolutionary benefits of helping others into two categories. Direct fitness benefits means helpers tend to have more offspring, all else being equal. Indirect fitness benefits (or kin selection) mean that helpers pass on more of their own genes because their relatives have more offspring. Kin … Continue reading Do you think juvenile vampire bats would regurgitate food to their hungry parents?
A paper just published on gelada baboons entitled "Concessions of an alpha male? Cooperative defence and shared reproduction in multi-male primate groups" claims to be among the first demonstrations of cooperative male defense of a female group in a mammal. But the authors seemed to have forgotten that bats are also mammals. A little background: most mammals live in … Continue reading Cooperative male alliances in bats