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Bradley, B.P., M.A. Lane & C.M. Gonzalez. (1992). A molecular mechanism of adaptation in an estuarine copepod. Netherlands Journal of Sea Research. 30:3-10.
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Bradley, B.P., M.A. Lane & C.M. Gonzalez
1992
A molecular mechanism of adaptation in an estuarine copepod.
Netherlands Journal of Sea Research
30:3-10.
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The estuarine copepod Eurytemora affinis (Poppe) has been shown to adapt better at the individual (physiological) and population (genetic) level to rapidly cycling environments than to slowly cycling temperatures. In addition, female copepods are physiologically more flexible than males. Three questions arise from these observations. Why is the geographical and seasonal distribution of Eurytemora in estuaries so limited? Why is the genetic variance so high in an organism which is so physiologically flexible? And does the difference between sexes help to explain the maintenance of genetic variance? A mechanism of adaptation which may allow further examination of these questions is the increased synthesis of stress proteins, first identified as heat shock proteins (HSP). The HSPs in the copepod Eurytemora affinis are quantitatively and qualitatively related to stress. Temperature and osmotic stress, for example, induce different sets of proteins. Thus, better understanding the phenomenon may be useful in marine ecology.
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