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Science 31 July 1981:
Vol. 213. no. 4507, pp. 577 - 579
DOI: 10.1126/science.213.4507.577
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Articles

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

DAVID O. CONOVER 1 and BOYD E. KYNARD 1

1 Massachusetts Cooperative Fisheries Research Unit, Department of Forestry and Wildlife Management, University of Massachusetts, Amherst 01003

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.

Submitted on December 4, 1980
Revised on March 10, 1981


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