Electrophoretic evidence revealed the common occurrence of an all-female species of Menidia (Pisces: Atherinidae) at two localities separated by 280 kilometers on the Gulf Coast of Texas. This finding adds significantly to the known taxonomic spectrum of unisexuality in fishes and demonstrates that unisexuality may be more common among fishes that do not bear live young than is generally suspected.
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Echelle et al. (1981) studied this question.
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