First record of F_2 hybrid striped bass (Morone chrysops ♀ × Morone saxatilis ♂ × Morone chrysops ♀ × Morone saxatilis ♂) in Kemer Dam Lake

摘要

The morphometric and meristic characters of 2 F_2 hybrid striped bass (M. chrysops ♀ × M. saxatilis ♂ × M. chrysops ♀ × M. saxatilis ♂) from the family Moronidae are described. Two specimens were caught from Kemer Dam Lake. The body of the F_2 hybrid striped bass was elongated, moderately compressed, and scaly. Dorsal surface and sides were silver and black to olive-gray, and the abdomen was white in color. Four or 5 longitudinal broken stripes ran above the lateral line to the caudal fin. The stripes were less visible behind the pectoral fins and below the lateral line. The bodies of the F_2 specimens were deeper than 1/4 the fork length. The 2 dorsal fins were separated entirely. The first dorsal fin had 8–9 spines, and the second dorsal fin had a spine and 13–14 soft rays. The caudal fin was slightly forked. The anal fin had 3 spines with 12–14 soft rays. One tooth patch was present on the anterior of the tongue. According to our results, the fish were F_2 hybrid striped bass offspring of F_1 hybrid striped bass, which can reproduce naturally in Turkey. Morphological criteria showed that the F_2 hybrids tended to resemble white bass (M. chrysops).