University of Ondokuz Mayis, Faculty of Fisheries, Department of Fishing and Processing Technology, Sinop, Turkey.
Int J Food Sci Nutr. 2009 Aug;60(5):413-23. doi: 10.1080/09637480701777886.
Brown trout is one of the most preferred wild freshwater fish species in the east Black Sea region (Turkey) due to its nutritional value and palatable aroma as well as being popular for sport fishing. In this research, seasonal variations in the crude lipid, gonadosomatic index and fatty acid composition of wild and farmed brown trout were investigated. The spawning period of wild and farmed brown trout appears to be from August to October and from October to January, respectively. The mean crude lipid content in farmed brown trout (3.62%) was significantly higher (P≤0.05) than that of wild brown trout (2.80%). Significant seasonal differences (P≤0.05) in crude lipid content were observed in both fish. The percentage of total saturated fatty acids was similar (P≥0.05) in both fish. Total polyunsaturated fatty acids were higher (P≤0.05) in the wild brown trout compared with the farmed brown trout, while its total monounsaturated fatty acids content was lower (P≤0.05). The muscle lipids of wild fish contained significantly (P≤0.05) higher percentages of C16:1n-7, C17:1n-7, C18:3n-3, C20:2n-6, C20:4n-6, C20:5n-3 and C22:2n-6 fatty acids and contained lower percentages of C14:0, C18:1n-9, C18:2n-6, C20:1n-9, C24:1n-9 and C22:6n-3 fatty acids than farmed fish. The total amounts of n-3 fatty acids in wild fish were higher than in farmed fish, but total amounts of n-6 fatty acids in farmed fish were higher than in wild fish. The n3/n6 proportion in wild fish was higher than that of farmed fish.
虹鳟是东黑海水域（土耳其）最受欢迎的野生淡水鱼类之一，因其营养价值、可口的香气以及受欢迎的运动钓鱼而备受青睐。本研究调查了野生和养殖虹鳟的粗脂肪、性腺体指数和脂肪酸组成的季节性变化。野生和养殖虹鳟的产卵期似乎分别为 8 月至 10 月和 10 月至 1 月。养殖虹鳟（3.62%）的粗脂肪含量明显高于野生虹鳟（2.80%）（P≤0.05）。两种鱼的粗脂肪含量均有显著的季节性差异（P≤0.05）。两种鱼的总饱和脂肪酸百分比相似（P≥0.05）。野生虹鳟的总多不饱和脂肪酸含量高于养殖虹鳟（P≤0.05），而其总单不饱和脂肪酸含量较低（P≤0.05）。野生鱼肌肉脂质中 C16:1n-7、C17:1n-7、C18:3n-3、C20:2n-6、C20:4n-6、C20:5n-3 和 C22:2n-6 脂肪酸的百分比显著更高（P≤0.05），而 C14:0、C18:1n-9、C18:2n-6、C20:1n-9、C24:1n-9 和 C22:6n-3 脂肪酸的百分比显著更低（P≤0.05）。野生鱼的 n-3 脂肪酸总量高于养殖鱼，但养殖鱼的 n-6 脂肪酸总量高于野生鱼。野生鱼的 n3/n6 比例高于养殖鱼。
