Another important point

Another important - Another important point contra the Adaptationist Program is that some traits may not be capable of achieving"maximal

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Another important point contra the Adaptationist Program is that some traits may not be capable of achieving "maximal adaptedness" selection acts on the entire phenotype (debatable sensu units of selection; later) and phenotypes are compromises . Orians' central place foraging model: bird sits in middle of territory, may fly a certain route depending on availability and size of food items. Could design and optimal foraging strategy BUT, when the birds leaves nest, young are available for predation. Foraging strategy may not be the best foraging strategy, but the best compromise given predation risk. Green sea turtle : excellent swimmer; terrible digger (not designed for it) but must use flippers to dig hole for laying eggs. Flippers are not "optimal" for digging, but they work. Phenotypes as compromises underscores the importance of constraints . Evolution of one trait can be constrained due to correlation among traits: selection for body weight in broiler chickens: get more fat with it; selection for increase milk yield in
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This note was uploaded on 11/05/2011 for the course BIOLOGY MCB2010 taught by Professor Jessicadigirolamo during the Fall '10 term at Broward College.

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