BIOL359 Chapter Notes - Chapter 12: Prairie Dog, American Coot, Wood Mouse
26 Apr 2013
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When and why do individuals cooperate and why do they help their parents raise their siblings instead of. Altruism is the central paradox of darwinism (challenge for the theory of evolution: darwin"s explanation: selection would favor traits that result in decreased personal fitness if they increase the survival and reproductive success of close relatives. B: the benefit to the recipient, measured in units of surviving offspring. Type i: attacking hawk, whistling squirrel is captured 2% of the time while non-whistling squirrels are captured 28% of the time (whistling = selfish) Female remain in their birth coterie for life, whereas males disperse when sexually mature. White-fronted bee-eaters: young that are old enough to breed on their own will instead remain & help their parents rear brothers, sisters, or half-siblings. Significant help to the parents, each help = additional 0. 47 offspring reared to maturity. Kin selection in other contexts: cannibalistic tadpoles: Tadpoles of spadefoot toads (spea bombifrons) 2 morphs.
