State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China.
J Sci Food Agric. 2012 May;92(7):1504-10. doi: 10.1002/jsfa.4734. Epub 2011 Dec 22.
Populations of Coilia nasus, an anadromous fish, have declined dramatically in the Yangtze River estuary and its associated lakes owing to excessive fishing and changes in aquatic ecology. Recently, the success of artificial breeding programmes and advanced methods of propagation have allowed great increases in production of this species. Thus, to gain a better understanding of the flesh quality of C. nasus, muscle cellularity and quality parameters of the flesh were studied in wild and farmed specimens.
Muscle cellularity was different between wild and farmed fish. Muscle fibre density was significantly higher in farmed specimens, while muscle fibre diameter was higher in wild specimens. Farmed fish had higher moisture, hydroxyproline and collagen contents and a lower fat content compared with wild fish. No significant differences in textural parameters were found between the two groups. Saturated (SFA), polyunsaturated (PUFA) and total n-6 fatty acid contents were significantly higher in farmed fish, but monounsaturated fatty acid (MUPA) content was higher in wild fish.
The variation in the studied parameters determined significant differences in the flesh quality of wild and farmed C. nasus. Depending on muscle cellularity and fatty acid composition, farmed fish could be more suitable for human consumption than wild fish.
由于过度捕捞和水生态环境变化，洄游鱼类长江刀鱼的数量在长江口及其相关湖泊中急剧减少。最近，人工繁殖计划和先进的繁殖方法的成功使得该物种的产量大幅增加。因此，为了更好地了解长江刀鱼的肉质，研究了野生和养殖标本的肌肉细胞密度和肉质质量参数。
野生和养殖鱼的肌肉细胞密度不同。养殖鱼的肌肉纤维密度显著较高，而野生鱼的肌肉纤维直径较高。与野生鱼相比，养殖鱼的水分、羟脯氨酸和胶原蛋白含量较高，脂肪含量较低。两组间的质地参数无显著差异。养殖鱼的饱和（SFA）、多不饱和（PUFA）和总 n-6 脂肪酸含量显著较高，但野生鱼的单不饱和脂肪酸（MUPA）含量较高。
研究参数的变化导致野生和养殖长江刀鱼的肉质存在显著差异。根据肌肉细胞密度和脂肪酸组成，养殖鱼可能比野生鱼更适合人类食用。
