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Gonad development and somatic growth in an intergeneric cyprinid hybrid from lake kinneret israel


, : Gonad development and somatic growth in an intergeneric cyprinid hybrid from lake kinneret israel. Journal of Applied Ichthyology 8(1-4): 110-121

Gonad development and somatic growth were studied in the hybrid between Barbus longiceps and Capoeta damascina (Pisces: Cyprinidae) from Lake Kinneret (Lake Tiberias), during the years 1987-1990. Reproductive periods of both parental species were considerably overlapping. Among 39 hybrid specimens sampled, 5 were found to be males with arrested spermatogenesis, 31 were females with abnormal gonads and 3 were structural hemaphrodites with arrested gametogenesis. In all hybrids gonad development was impaired. No ripe eggs or spermatozoa were ever observed in histological sections of the hybrids gonads. However, during the breeding season the hybrids possessed secondary sex characteristics, similar to those presnet in the parental species. Hybrid somatic growth was intermediate between that of the parental species. The hybrid dressing rate was also intermediate between that of the parental species.

US$19.90

DOI: 10.1111/j.1439-0426.1992.tb00673.x


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