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Cage culture of gilthead sea bream (Sparus aurata) in two Sardinian coastal lagoons
Barbato, F.; Fanari, A.; Meloni, F.; Savarino, R. (1993). Cage culture of gilthead sea bream (Sparus aurata) in two Sardinian coastal lagoons, in: Barnabé, G. et al. (Ed.) Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18: pp. 95-104
In: Barnabé, G.; Kestemont, P. (Ed.) (1993). Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. Special Publication European Aquaculture Society, 18. European Aquaculture Society: Gent. 587 pp., meer
In: Special Publication European Aquaculture Society. European Aquaculture Society: Bredene. ISSN 0774-0689, meer
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Documenttype: Congresbijdrage
Trefwoord
    Marien/Kust
Auteurs  Top 
  • Barbato, F.
  • Fanari, A.
  • Meloni, F.
  • Savarino, R.
Abstract
    A rearing trial of Sparus aurata in floating cages was set up in two Sardinian coastal lagoons. Four cages measuring 6x6x2m were sited in the Feraxi lagoon and five cages measuring 5x5x2m were sited in S. Giovanni Lagoon. A total number of 22.780 gilthead sea bream fry averaging 6.9g was stocked in the cages. Artificial pelleted feed was distributed manually twice a day. After a rearing period ranging between 213 and 279 days, four cages in S. Giovanni and two cages in Feraxi were emptied. The average comprehensive survival was 90.3% and the average growth was from the initial 6.9g to 279.1g. One cage in Feraxi was then emptied in two separate periods (respectively after 10 and 13 months of rearing) for market requirements. One cage per lagoon was kept until August, so to reach 15 months of rearing. After this period the survival was 83.3% and the average individual weight was 540g. During the trial the recorded environmental parameters (temperature. salinity and dissolved oxygen) were within favourable limits; in particular, temperature range was between 9.5 and 30°C. The trial gave very interesting results from the viewpoint of economic and biological performances, but made clear that the particular environment necessitates tight controls in order to prevent dangerous effects on the long term biological balance of the lagoon and on the activity itself.
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