Hybridization Experiments in Rhodeine Fishes (Cyprinidae, Teleostei)

The Interspecific Hybrids of Rhodeus ocellatus and Rhodeus sericeus amarus amarus

Abstract

1. By means of hybridization experiments the presence of genetic affinity be tween Rhodeus sericeus amarus amarus from Western Europe and Rhodeus ocellatus from Japan could be established.
2. Both kinds of hybrids obtained from this combination were intermediate between the parental species and showed a male phenotype.
3. In the spawning season, both kinds of hybrids displayed full breeding colors and spawning behavior, but spermatogenesis was impaired.