Testing the adaptive benefit of physiological acclimation

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For over a century, physiologists have observed that organisms can modify their physiological function in response to changes in the environment, a process known as acclimation. However, until recently, the adaptive benefit of these acclimation responses has been assumed rather than tested. In this study, I will utilize the effects of temperature on the ability of male mosquito fish (Gambusia holbrooki) to obtain matings and subsequently sire offspring to test the benefit of both thermal acclimation and developmental plasticity. This will allow the most comprehensive test of two important hypotheses in comparative physiology: the Beneficial Acclimation Hypothesis and the Beneficial Developmental Plasticity Hypothesis.