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首页> 外文期刊>Aquaculture >Growth performance and nutrient utilization of growth hormone transgenic female triploid Atlantic salmon (Salmo salar) reared at three temperatures in a land-based freshwater recirculating aquaculture system (RAS)
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Growth performance and nutrient utilization of growth hormone transgenic female triploid Atlantic salmon (Salmo salar) reared at three temperatures in a land-based freshwater recirculating aquaculture system (RAS)

机译：在陆基淡水再循环水产养殖系统（RAS）中，在三个温度下饲养生长激素转基因女性三倍体大型鲑鱼（沙摩砂浆）的生长性能和营养利用

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摘要

This study examined the effect of rearing temperature on growth performance and nutrient utilization of AquAdvantage Salmon (growth hormone transgenic female triploid Atlantic salmon) reared in a land-based freshwater recirculating aquaculture system (RAS) at three temperatures (10.5 degrees C, 13.5 degrees C, 16.5 degrees C) from first-feeding to 1500 g. All fish were fed the same commercial diets, which were analyzed for proximate, amino acid, fatty acid and mineral composition, and daily feed consumption was recorded for the calculation of feed conversion ratios (FCRs). Whole-body samples were collected at 300, 500, 800 and 1500 g for proximate composition, and fillet samples were collected at 500, 800 and 1500 g for amino acid, fatty acid, and mineral composition. Fillet yield, astaxanthin concentration and DSM SalmoFan (TM) colour were determined at 1500 g. Results indicated that fish reared at 16.5 degrees C required more feed per unit of biomass gain, and were less efficient at depositing important nutrients such as omega-3 fatty acids, compared to salmon reared at 10.5 degrees C and 13.5 degrees C. With higher viscerosomatic index (VSI) and condition factor (K) scores at 16.5 degrees C, these fish also diverted more dietary energy to lipid deposition in the viscera instead of muscle tissue compared to the lower temperature treatments. Fish reared at 16.5 degrees C had lighter fillet colouration compared to salmon reared at 13.5 degrees C, and exhibited lower fillet yields than the colder temperature groups. Fish reared at 16.5 degrees C reached the end target weight (1500 g) in 36 fewer days compared to 13.5 degrees C and 93 fewer days in contrast to 10.5 degrees C. However, thermal-unit growth coefficient (TGC) results indicated that growth rate was higher in fish reared at 10.5 degrees C compared to 16.5 degrees C for the majority of the trial. Collectively, these results suggest that it is preferable to rear AquAdvantage Salmon at either 10.5 degrees C or 13.5 degrees C in freshwater RAS. The information generated from this study is the first to provide insight into the relationships between rearing temperature and nutrient utilization in AquAdvantage Salmon for commercial application.
机译：本研究检测了饲养温度对三个温度（10.5℃，13.5℃ 16.5℃）从第一喂养到1500克。所有鱼类均采用相同的商业饮食，分析近似，氨基酸，脂肪酸和矿物组合物，并记录日常饲料消耗用于计算进料转化比率（FCR）。在300,500,800和1500g上收集全体样品以进行近似组成，并在500,800和1500g中收集圆角样品，用于氨基酸，脂肪酸和矿物组合物。圆角产率，虾青素浓度和DSM Salmofan（TM）颜色在1500g下测定。结果表明，在16.5摄氏度下饲养的鱼每单位生物质增益需要更多的饲料，并且与在10.5℃和13.5℃下饲养的鲑鱼相比，沉积ω-3脂肪酸等重要营养物质效率较低。与较低的温度处理相比，指数（VSI）和条件因子（k）分数在16.5摄氏度下分数，这些鱼也将更多的膳食能量转移到粘膜中的脂质沉积而不是肌肉组织。与在13.5摄氏度的鲑鱼相比，9.5摄氏度饲养的鱼具有更轻的圆角着色，并且表现出比较冷的温度基团更低的圆角产率。在16.5摄氏度下饲养的鱼在36天内达到最终目标重量（1500g），而与13.5℃和93天相比，与10.5℃相比减少93天。然而，热单元生长系数（TGC）结果表明增长率与大部分试验相比，以10.5摄氏度饲养的鱼类较高。总的来说，这些结果表明，在淡水Ras的10.5摄氏度或13.5摄氏度中，优选后部的Audaithage鲑鱼。本研究产生的信息是第一个提供了对商业应用的Aquistage Salmon中饲养温度和营养利用之间的关系的洞察。

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