Hybridization of Two Darter Species Native to Central Virginia
Spawning behavior and hybridization of Etheostoma nigrum and E. olmstedi were studied in the lab using wild individuals collected from populations in central Virginia. Hybridization is common in the genus Etheostoma, but there have been conflicting results in studies involving E. nigrum and E. olmstedi. The question is pertinent to central Virginia because populations with characteristics intermediate of the two species occur there, and it may be that these are hybrids. We collected both darter species in the wild and placed various inter- and intra-specific mating pairs in small aquaria....
