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White Sea Bream (white + sea_bream)
Selected AbstractsDietary Lipid Utilization by White Sea Bream (Diplodus sargus) JuvenilesJOURNAL OF THE WORLD AQUACULTURE SOCIETY, Issue 3 2008R. Sá Six experimental diets were formulated to be isoproteic (45% protein) and to contain from 9 to 24% dietary lipid levels (dry matter basis). Fish meal and fish oil were used as the main protein and lipid sources, respectively. At the end of the trial, there were no significant differences (P > 0.05) among groups in fish performance or in whole-body composition. From the results of this trial, it is concluded that, within the range of values tested, increasing dietary lipid levels above 9% has no advantage as it does not promote growth or spare protein for growth purposes. [source] Blood cell profile of six Mediterranean mariculture fish speciesJOURNAL OF APPLIED ICHTHYOLOGY, Issue 1 2007M. Pavlidis Summary The haematological profile and a description of the cell types from the peripheral blood of six Mediterranean fish species are presented. The highest haematocrit value was recorded in the saupe, Sarpa salpa (P < 0.001), the only herbivorous species, and which also lacked monocyte cells. Eosinophils were absent from the blood of the European sea bass Dicentrarchus labrax. White sea bream, Diplodus sargus and gilthead sea bream, Sparus aurata had statistically significantly high numbers of neutrophils and low numbers of lymphocytes (P < 0.001). The numbers of different leucocyte cell types were not influenced by sex or maturity stage in any species, although some variation in the maximum diameter of the cells was observed. [source] Dietary protein requirement of white sea bream (Diplodus sargus) juvenilesAQUACULTURE NUTRITION, Issue 4 2008R. SÁ Abstract A trial was undertaken to estimate the protein requirement of white sea bream (Diplodus sargus). Five fish meal-based diets were formulated to contain graded levels of protein (from 60 to 490 g kg,1). Each diet was assigned to triplicate groups of 25 fish with a mean individual body weight of 22 g. Fish fed the 60 g kg,1 protein diet lost weight during the trial, while growth improved in the other groups as dietary protein level increased up to 270,370 g kg,1. Feed efficiency improved as dietary protein level increased. Maximum protein efficiency ratio (PER) was observed with the 17% protein diet. N retention (NR) (% N intake) was not different among groups fed diets with 17% protein and above. Ammonia excretion (g kg,1ABW day,1) increased as dietary protein level increased, while no differences in urea excretion were noted. An exponential model was used to adjust specific growth rate and NR (g kg,1 day,1) to dietary protein level. Based on that model, dietary protein required for maximum retention was 330 g kg,1, while for maximum growth it was 270 g kg,1. On a wet weight basis, there were no differences in whole body composition of fish-fed diets with 170 g kg,1 protein and above, except for the protein content, which was lower in group fed the 170 g kg,1 protein diet than the 490 g kg,1 protein diet. Specific activities of hepatic amino acid catabolism enzymes (glutamate dehydrogenase, alanine aminotransferase and aspartate aminotransferase) increased as dietary protein levels increased. There were no differences among groups in fatty acid synthetase and malyc enzyme but 6-phosphate dehydrogenase (G6PDH) was significantly lower in fish fed the 60 g kg,1 protein diet than the 170 and 490 g kg,1 protein diets. [source] Dietary supplementation of mannan oligosaccharide on white sea bream (Diplodus sargus L.) larvae: effects on development, gut morphology and salinity toleranceAQUACULTURE RESEARCH, Issue 9 2010Arkadios Dimitroglou Abstract The influence of dietary mannan oligosaccharide (MOS) on the development, gut integrity and quality (in respect of stamina and survivability) of white sea bream Diplodus sargus L. larvae was investigated. White sea bream larvae were held under appropriate rearing conditions and fed Artemia, enriched by A1 DHA SelcoÔ with the addition or absence of MOS (Bio-Mos®). The results indicated that larval growth performance and survivability were not affected by the MOS supplementation. Light microscopy revealed that MOS supplementation significantly improved the intestinal morphology by increasing the villi surface area by over 12%. Transmission electron microscopy revealed that MOS supplementation increased the microvilli length by 26% compared with the control. Salinity challenge experiments showed that MOS significantly increased larval stamina and survival in both 0 and 60 mg L,1 salinity water by 13% and 22.9% respectively. These improvements in the larval quality at the early stages of fish development are important for the efficiency of intensive hatchery production. [source] Growth performance and metabolic utilization of diets with different protein:carbohydrate ratios by white sea bream (Diplodus sargus, L.) juvenilesAQUACULTURE RESEARCH, Issue 1 2007R Sá First page of article [source] | ||||||||||