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Science 12 January 1973:
Vol. 179. no. 4069, pp. 180 - 181
DOI: 10.1126/science.179.4069.180
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Articles

Unisexual Fish: Laboratory Synthesis of a "Species"

R. Jack Schultz 1

1 Ecology Section, Biological Sciences Group, University of Connecticut, Storrs 06268

By hybridizing bisexual (gonochoristic) fishes, all-female clones have been produced that are comparable to those of a wild unisexual "species," Poeciliopsis monacha-lucida, living in northwestern Mexico. The laboratory unisexuals have consistently given birth only to female progeny for six generations.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)