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Primary productivity in tanks for intensive ongrowing of gilthead sea bream (Sparus aurata L.)
García García, B.; Huertas, B.; Rosique, M.J.; Moreno, J. (1993). Primary productivity in tanks for intensive ongrowing of gilthead sea bream (Sparus aurata L.), 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. 105-113
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
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  • García García, B.
  • Huertas, B.
  • Rosique, M.J.
  • Moreno, J.
Abstract
    Primary productivity in an ongrowing tank of 450m3 in volume stocked with gilthead sea bream (Sparus aurata L.) was studied during the last stages of culture from June to December. The efficiency of a mechanical propeller aerator in reducing diel oxygen variations produced by phytoplankton populations was also studied in that same pond. Chlorophyll-a concentration in incoming water varied from 0.092 to 0.367mg.m-3; values exceeding 0.638mg.m-3 were also measured at the outflow, two peaks occurring in July and September with values of 3.998 and 4.582mg.m-3, respectively. During these peaks diel dissolved oxygen variations were great when the propeller aerator was not in operation (40-180% of DO saturation}, but decreased markedly when it was switched on (60-130% of DO saturation), the diel temperature difference being also reduced.
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