Swim bladder inflation failure affects energy allocation, growth, and feed conversion of California Yellowtail (Seriola dorsalis) in aquaculture

Schwebel Laura N.; Stuart Kevin; Lowery Mary Sue; Wegner Nicholas C.

摘要

This study examines the effects of swim bladder inflation failure, a common developmental abnormality in finfish aquaculture, on the energy allocation, growth, and development of California Yellowtail (Seriola dorsalis). Health and fitness metrics including oxygen consumption, aerobic scope, critical swimming speed, feed conversion ratio, and growth rate, were monitored over a 32-week growout period in three groups of S. dorsalis: aquaculture-reared fish that failed to inflate their swim bladders (uninflated), aquaculture-reared fish with properly inflated swim bladders (inflated), and wild-caught individuals (wild). After the growout period, the uninflated fish had significantly lower body mass (636.1 +/- 80.4 g vs. 758.6 +/- 92.7 g inflated), shorter body length (36.5 +/- 1.9 cm vs. 39.6 +/- 2.0 cm inflated), and smaller girth (21.5 +/- 1.2 cm vs. 23.2 +/- 1.1 cm inflated) than the inflated fish. In addition, the uninflated fish had the least efficient feed conversion ratio (2.08 uninflated vs. 1.49 inflated, 1.41 wild), needing 39.8% more feed than the inflated fish, and 47.8% more feed than the wild fish to gain equivalent mass. These differences in growth and feed conversion appear to be primarily attributed to differences in energy allocation. Measures of oxygen consumption using a swim tunnel respirometer at two time points during the growout period showed that uninflated fish had significantly higher metabolic costs than both the inflated and wild groups over a large range of the swimming speeds tested. In addition, the uninflated fish were often observed swimming faster in their growout tank, likely to generate enough lift to compensate for the lack of a buoyant swim bladder. The wild-caught fish had the lowest feed conversion ratios and had significantly lower metabolic costs than both the inflated and uninflated aquaculturereared fish at the beginning of the growout period (shortly after capture from the wild). The results of this study show that rearing S. dorsalis without a functional swim bladder is not economically feasible based on their poor growth and feed conversion ratios, and suggest that there is room for improvement in the metabolic efficiency of cultured S. dorsalis with properly inflated swim bladders.

机译：本研究探讨了游泳膀胱通胀失败，血腥水产养殖中常见发育异常的影响，加州黄土的能源分配，生长和发展（硅灰虫含量）。在三组S. dorsalis的32周的种植期间，监测包括氧气消耗，有氧范围，临界速度，饲料转化率和增长率的健康和健身度量，饲料转化率和增长率Bladders（uninflated），水产养殖的鱼类饲养的鱼类吹过游泳衣（膨胀）和野生捕获的个人（野生）。在种植期后，脱脂的鱼体质量显着降低（636.1 +/- 80.4克，膨胀的658.6 +/- 92.7g），体长较短（36.5 +/- 1.9厘米，膨胀39.6 +/- 2.0厘米比膨胀的鱼类更小的周长（21.5 +/- 1.2厘米，膨胀23.2 +/- 1.1厘米）。此外，脱脂的鱼具有最低的饲料转换率（2.08卸载与1.49膨胀，1.41野），进料量比膨胀鱼更多，进料量比野生鱼更多，以获得等效物质。这些增长和饲料转化差异似乎主要归因于能量分配的差异。在种植期间，使用游泳隧道呼吸计的氧气消耗测量显示，在种植期间的两个时间点显示，脱脂的鱼类的代谢成本明显高于膨胀和野生组在大范围的游泳速度上进行测试的。此外，未冻结的鱼经常观察到他们的种植罐中的游泳速度更快，可能会产生足够的升力以补偿缺乏浮动的游泳膀胱。野生捕获的鱼具有最低的饲料转化比率，并且在种植期初的膨胀和无灌注的水产药鱼中的代谢成本显着降低了（从野外捕获后不久）。本研究的结果表明，没有功能性游泳膀胱的饲养S. Dorsalis基于它们的增长和饲料转化比率差，并表明存在改善培养的S. Dorsalis的代谢效率的空间游泳衣。

Swim bladder inflation failure affects energy allocation, growth, and feed conversion of California Yellowtail (Seriola dorsalis) in aquaculture

摘要

著录项

相关主题

期刊订阅