Expression of infection-related immune response in European sea bass (Dicentrarchus labrax) during a natural outbreak from a unique dinoflagellate Amyloodinium ocellatum
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Dicentrarchus
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The effect of seasonal changes (summer versus winter) upon the quality of heat-induced gel products from farmed sea bass ( Dicentrarchus labrax) was studied. Moreover, the effect of microbial transglutaminase addition (0.5%, w/w) on the quality was assessed. Fat content of gel products attained from sea bass grown during summer was higher (12.0% versus 7.6%). Textural properties of the gels from the summer fish were higher. Protein of gels from winter fish was less soluble in SDS + DTT (sodium dodecyl sulphate, SDS; dithiothreitol, DTT). Contrary to some literature, higher fat level may have played a protective role during processing. Accordingly, season via fat content variation had a strong effect on the gelling ability of heat-induced gels prepared from sea bass.
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Dithiothreitol
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One of the major problems in the mariculture of the commercially important European sea bass, Dicentrarchus labrax, is that females grow 20-50% more rapidly than males. For that reason, farmers are interested in developing female monosex populations. Studies on evolution, genet- ics, and physiology have been conducted during the last decade to solve this problem. This review summarizes the latest data related to the effects of evolution, genetics, physiology, and environment on sex determination and differentiation in the European sea bass.
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Sea bass
Mariculture
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European sea bass (Dicentrarchus labrax) is a widely consumed marine fish in Mediterranean areas, and different farming techniques are applied for fish culturing to satisfy the growing demand for seafood. The aim of this study was to investigate the effects of conventional and organic feed on the quality of cultured European sea bass (Dicentrarchus labrax) collected during the growth period. The concentrations of ash, moisture, essential macro-elements (Ca, K, Mg, Na and P), micro-elements (Co, Cr, Cu, Fe, Mn, Ni and Zn) and toxic elements (As, Cd, and Pb) were determined in feeds and in fillets of cultured fish. The results were compared to those obtained from wild sea bass. Results showed that the differences between organic diet-fed and conventional diet-fed sea basses varied in relation to the specific element measured and the growth period. The former showed higher concentration of Fe, Mg and Cr, and lower Na content. The amount of P, Na, Fe, Cu and Cr in wild sea bass was significantly (P ≤ 0.05) higher than that found in farmed fish. The levels of toxic elements in cultured sea bass were always within the allowed limit for fishery products. Wild samples had significantly (P ≤ 0.05) higher content of arsenic and lead than farmed sea bass. Cultured fish represent a valuable dietary source of essential macro- and micro-elements. Controlled rearing systems and feedings were related to a decrease in the presence of some toxic metals in cultured fish compared with wild fish.
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Sea bass
Serranidae
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Sea bass
Serranidae
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Sea bass
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This study was aimed to investigate the effects of dietary supplementation with exogenous enzymes such as phytase and protease enzymes on the growth performance, haemato-immunological, antioxidative status, and intestinal histomorphometry of European seabass (Dicentrarchus labrax). One hundred and fifty Sea bass (Dicentrarchus labrax) fingerlings with an initial body weight of 20 ± 2 g were obtained from Borg Al-Arab, Mariout regain at Alexandria Governorate, Egypt. The fingerlings were stocked into 15 fiberglass tanks (each with 30 m3) at the same. Each tank was stocked with 10 fish. The two exogenous enzymes used for the trial were phytase and protease. Two of the formulated diets were supplemented with the exogenous (phytase and protease at two doses from both 1000 mg kg-1 and 2000 mg kg-1, respectively) and the basal diet served as control diet. Our results concluded that, enzymes play an important role in formulating eco-friendly aqua-feeds. The use of enzymes as a feed additive has rapidly expanded and significant use in aqua-feed. Although the economic and social benefits of enzymes have been well established, the future of feed enzymes is a bright one in the aquaculture industry. From the current study, it can be concluded that dietary supplementation with protease and phytase has the potential to improve the growth performance, haemato-immunological, and antioxidative parameters of cultured sea bass. Additionally, the best inclusion dose of protease and phytase enzymes is a 2000 mg/kg diet. Further quantitative studies are necessary to confirm how exogenous enzymes (especially protease and phytase) modulate intestinal microbiota.
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Trace elements in otoliths of sea bass (Dicentrarchus labrax L.) and sea bream (Sparus aurata L.) from fish farms and coastal wild populations in the western Mediterranean Sea were analysed by inductively coupled plasma-mass spectrometry. Results showed that concentrations of Mg, K, and Mn differed significantly between wild and farmed sea bass, while concentrations of Mg, K, Mn, Fe, Zn, Sr, and Ba varied significantly between wild and farmed sea bream. Discriminate analysis and cross-validation classification showed that the trace element profile in otoliths can be used to separate farmed fish from wild stocks with high accuracy on both sea bass (individuals correctly classified: 90.7 %) and sea bream (individuals correctly classified: 96.6 %). Moreover, trace elements in otoliths resulted to be useful to discriminate among wild fish stocks within each species.
Dicentrarchus
Sea bass
Serranidae
Mariculture
Sparidae
Trace element
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Sea bass
Dicentrarchus
RNA-Seq
Umami
Taste receptor
Fish Proteins
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Sea bass
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Abstract Static acute toxicity tests of 4 and 7 days duration were performed on sea bass ( Dicentrarchus labrax ) and European eel ( Anguilla anguilla ). The 96‐hour LC 50 for sea bass (x̄; = 5 cm) was 274, 220, and 154 mg/liter N‐NO 2 at water temperatures of 17, 23 and 27°C, respectively, in sea water. The 96‐hour LC 50 for eel elvers was 84, 213, 264, 503, 812 and 974 at salinities of 0, 6, 12, 24, 30 and 36 g/liter.
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