Abstract
In order to evaluate differences in general health and nutritional values of gilthead sea bream (Sparus aurata), the effects of semi-intensive, land-based tanks and sea-cages intensive rearing systems were investigated, and results compared with captured wild fish. The physiological state was determined by measuring the activity of three different intestinal digestive enzymes: alkaline phosphatase (ALP), leucine aminopeptidase (LAP) and maltase; and the activity of the hepatic ALP. Also, the hepatic content in protein, cholesterol, and lipid were assessed. 13C-NMR analysis for qualitative and quantitative characterization of the lipid fraction extracted from fish muscles for semi-intensive and land based tanks intensive systems was performed. The lipid fraction composition showed small but significant differences in the monounsaturated/saturated fatty acid ratio, with the semi-intensive characterized by higher monounsaturated and lower saturated fatty acid content with respect to land based tanks intensive rearing system.
Highlights
Gilthead sea bream is one of the most important finfish species cultured in the Mediterranean region and its production is still in rapid expansion [1]
Fishes reared in the semi-intensive and in the sea-cages intensive conditions showed a significantly higher intestinal alkaline phosphatase (ALP) activity during the trial, but no significant differences in ALP enzymatic activity were observed at the end of the trial for all groups investigated with respect to the control
The enzymatic activities measured in reared fish at the end of the trial did not show significant differences from those measured in wild sea breams (Figure 1) at the end of the trial
Summary
Gilthead sea bream is one of the most important finfish species cultured in the Mediterranean region and its production is still in rapid expansion [1] Despite production of these species having reached a high level of quality and efficiency, the knowledge of its nutritional requirements and digestive processes is very scarce compared to other fish species [2]. Saturated and essential polyunsaturated fatty acids (n-3 and n-6) of commercial size reared gilthead sea bream (Sparus aurata) specimens, obtained with different methods of fish culture: semi-intensive (Acquatina basin, Frigole-Lecce, Puglia, Italy) and intensive in land based tanks (Maribrin s.r.l. aquaculture system, 8 Km south of Brindisi, Puglia, Italy) were further studied by 13C-NMR
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
