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Evaluation of zinc supplementation in European sea bass ( Dicentrarchus labrax ) juvenile diets
Author(s) -
Fountoulaki Eleni,
Morgane Henry,
Rigos George,
Antigoni Vasilaki,
Mente Eleni,
Sweetman John,
Nengas Ioannis
Publication year - 2010
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2010.02503.x
Subject(s) - dicentrarchus , sea bass , zinc , biology , juvenile , zoology , bass (fish) , fishery , fish <actinopterygii> , ecology , chemistry , organic chemistry
This study aimed to investigate the effect of increased zinc dietary levels on the growth performance, feed utilization, immune status and induced wound healing in European sea bass ( Dicentrarchus labrax) . Fish weighing 10 g were fed five diets containing organic zinc at 30, 70, 110 and 150 mg kg −1 diet and one inorganic zinc source (zinc oxide) at 150 mg kg −1 diet for a period of 12 weeks. No significant ( P >0.05) differences were found in the growth performance parameters (final weight, specific growth rate), immunological indices tested (respiratory burst activity in whole blood) and the wound‐healing process. Zinc accumulation in the skin, vertebrae and liver increased significantly ( P <0.01) with increased dietary zinc levels but not in muscle. The highest zinc concentrations were obtained in skin tissue, followed by vertebrae, liver and muscle tissue. Using the concentration of zinc in skin as a response criterion, broken‐line analysis showed that the supplementation of 148 mg organic Zn kg −1 diet seemed to be the optimum dietary zinc supplementation level for sea bass juveniles.