Effects of protein and lipid content of three artificial foods on survival and growth of common dentex during the on-growing phase (Dentex dentex Linneaus, 1758)
Journal Title: Journal of Research in Biology - Year 2011, Vol 1, Issue 4
Abstract
The purpose of this work is to highlight the effects of three different foods containing protein and lipids on the survival and growth of common dentex during the on-growing phase. Common dentex fingerlings weighting 5-6g were grown for one year in polyester tanks. Three diets were used (A1, A2 and A3), respectively, had a protein content of 55%, 45%, 33% and lipid level of 10%, 15% 23%. At the end of the experiment, fishes have reached a weight of 310.20 ± 7.76, 406.24 ± 11.01, 230.20 ± 6.41g, respectively, for A1, A2 and A3. The respective survivals were of 60%, 80% and 88%. The specific growth rates were of 1.04, 1.13 and 1.04 while the respective food conversion rates were of 1.45, 1.30 and 2.0. Diet containing 45% protein and 15% lipid gave the highest specific growth rate and the lowest food conversion rate with an intermediate survival of 80%. Results obtained during this phase are encouraged to undertake large-scale farming in sea cages, knowing that to transfer the fries into cages must have a weight greater than 6g. This study showed that during one year common dentex reached commercial size despite a thermal profile whose values have not reached the optimum temperatures for the majority of sparidae
Authors and Affiliations
Ali Ait Ali, Azeddine Abrehouch, Kamal Chebbaki
Keywords
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