| one publication added to basket [14778] | The Barbus longiceps/Capoeta damascina hybrids - qualified for aquaculture?
Stoumboudi, M.; Villwock, W.; Golenser, E.; Abraham, M. (1992). The Barbus longiceps/Capoeta damascina hybrids - qualified for aquaculture?, in: Progress in aquaculture research: proceedings of the 4th German-Isreali Status Seminar held on October 30-31, 1990. Spec. Publ. Eur. Aquacult. Soc, 17: pp. 197-204
In: Moav, B. et al. (Ed.) (1992). Progress in aquaculture research: Proceedings of the 4th Status Seminar held on October 30-31, 1990 in GKSS-Forschungszentrum Geesthacht GmbH. Spec. Publ. Eur. Aquacult. Soc, 17. European Aquaculture Society: Oostende. ISBN 90-71625-11-7. 360 pp., more
In: Spec. Publ. Eur. Aquacult. Soc., more
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| Authors | | Top |
- Stoumboudi, M.
- Villwock, W.
- Golenser, E.
- Abraham, M.
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| Abstract |
During gametogenesis, the ultrastructure of the gonads and the gonadosomatic index (GSI) were studied in a natural hybrid population, and its parental species Barbus longiceps and Capoeta damascina from the Lake Kinneret in Israel. GSI was highest between January and March, at which time, the parental specimens had about 90% of the gonad occupied by spermatozoa or ripe oocytes. Hybrids had lower GSI during the season in which the parental species spawn, and gametogenesis never developed above the spermatid or early vitellogenic stages. Hybrid gonads were of two types: the "male" type and the "female'. hermaphrodite type, which were found in the sample at a ratio of 1:12. In all the examined cases (n=32), hybrid gonads were sterile. The dressing index was highest in Barbus longiceps followed by the hybrid, and lowest in Capoeta damascina. Since the sterility of the gonads is considered a positive factor in evaluating the marketing value of the fish, it is suggested that a pilot aquaculture project be established in order to rear hybrids and their parental species. The results of such a small scale experimental project will answer questions not yet fully clarified about the viability of hybrid larvae and the growth potential of the adult hybrids. |
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