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Re: single sex species

In a message dated 97-11-02 21:09:58 EST, you write:

<< Rivulus marmaratus and Poecilia formosa,  although admittedly male R.
 marmaratus can be artificially produced in the lab, and perhaps occasionally
 show up in nature. >>
Incorrect about the R. marmaratus -- males are actually rather common.  
J. L. Wiegert
Nanf List Manager....