Growth rate, body composition and feed digestibility/conversion of growth-enhanced transgenic Atlantic salmon (Salmo salar)
Growth rate, body composition and feed digestibility/conversion of growth-enhanced transgenic Atlantic salmon (Salmo salar)
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DOI：
10.1016/s0044-8486(00)00331-8
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发表时间：
2000-08-01
期刊：
影响因子：
4.5
通讯作者：
Sutterlin, AM
中科院分区：
文献类型：
--
作者：
Cook, JT;McNiven, MA;Sutterlin, AM
尽管在商业应用这项技术之前，转基因鲑鱼的生长速度有了显著的改善，但还需要更多关于一些具有重要商业意义的生产性状的生理信息。因此，在8-55g的蜕皮前生长间隔内，比较了F-2代生长增强型转基因大西洋鲑鱼和非转基因三文鱼的生长速度、饲料消化率、饲料转化率和体成分。在所研究的体重间隔内，生长增强型转基因鱼的生长速度是非转基因三文鱼的2.62-2.85倍。在这个体重区间内，转基因鱼的日饲料消耗量是对照鱼的2.14-2.62倍。转基因没有影响蛋白质和能量的消化程度，转基因鱼的消化率系数分别为88%和81%，对照鱼的消化率分别为90%和84%，两者都是在可比的体重区间内测量的。然而，转基因三文鱼与对照鱼相比，总饲料转化效率提高了10%。转基因三文鱼的蛋白质、干物质、灰分、脂肪和能量显著低于对照，而水分含量显著高于对照。整个研究过程中使用的转基因实验对象具有必要的生理可塑性，以适应远远超过该物种正常范围的生长加速，除了食欲更大和身体更瘦之外，几乎没有其他影响。(C)2000 Elsevier Science B.V.保留所有权利。
Although dramatic improvements in growth rates have been documented in growth-enhanced transgenic salmonid fish, prior to commercial implementation of this technology, there is a need for further information relating to the physiology of a number of commercially important production traits. Growth rate, feed digestibility, feed conversion, and body composition of F-2 generation growth-enhanced transgenic Atlantic salmon were therefore compared with that of non-genetically modified salmon, over a presmolt growth interval of 8-55 g.The growth-enhanced transgenic fish exhibited a 2.62- to 2.85-fold greater rate of growth relative to non-transgenic salmon over the body weight interval examined. Daily feed consumption over this body weight interval was 2.14- to 2.62-fold greater for the transgenic fish compared to the control fish. Transgenesis did not affect the extent to which protein and energy were digested, with digestibility coefficients 88% and 81%, respectively for transgenic fish, and 90% and 84%, respectively for control fish, both measured over comparable body weight intervals. However, transgenic salmon relative to control fish exhibited a 10% improvement in gross feed conversion efficiency. Body protein, dry matter, ash, lipid and energy were significantly lower in the transgenic salmon relative to controls while moisture content was significantly higher.The transgenic experimental subjects used throughout the present study possessed the physiological plasticity necessary to accommodate an acceleration in growth well beyond the normal range for this species with few effects other than a greater appetite and a leaner body. (C) 2000 Elsevier Science B.V. All rights reserved.