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Rate of feeding, growth and gross efficiency in juveniles of yellowtail (Seriola dumerilii)
García García, B.; Moreno, J.; Rosique, M.J. (1993). Rate of feeding, growth and gross efficiency in juveniles of yellowtail (Seriola dumerilii), 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. 255-260
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
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  • García García, B.
  • Moreno, J.
  • Rosique, M.J.
Abstract
    The optimal feeding rate for juveniles of yellowtail was studied (103g average weight) using pulverized fresh fish as food. Three feeding rates were tested: group 1, satiation; group 2, 90% of satiation; group 3, 70% of satiation. During the experimental period of 29 days, the average water temperature was 23°C and the dissolved oxygen was always at levels over 90% of saturation. At the end of the experiment, the feeding rate in each of the groups was 18.02% in group 1, 16.63% in group 2 and 15.30% in group 3. Weight and length differences are not significant comparing groups 1 and 2, whereas both of them show significantly higher values in relation to group 3 (p<0.05). The highest gross efficiency is obtained in group 2 as well as the lowest food conversion index. The suggested optimal daily feeding rate with such moist diets is 16.63% for fish of this size at 20-25°C.
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