Environmental Sex Determination: Interaction of Temperature and Genotype in a Fish

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Science  31 Jul 1981:
Vol. 213, Issue 4507, pp. 577-579
DOI: 10.1126/science.213.4507.577


Sex determination in an atherinid fish, the Atlantic silverside (Menidia menidia), is under the control of both genotype and temperature during a specific period of larval development. The sex ratios of the progeny of different females are variable and differ in their responsiveness to temperature. This demonstrates that sex ratio in fishes that normally have separate sexes can be influenced by the environment.

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