Effects of different diets on fatty acid composition and fighting behavior of Chinese mitten handed crab Eriocheir sinensis
LIU Handi1,2, LI Xiaodong1,2,3*, CAO Meng1,2, DAI Liang1,2, LI Yi3, JIANG Qiuyue3,GENG Dan2
1.College of Fisheries and Life Science, Dalian Ocean University, Dalian, China; 2.Key Laboratory of Breeding of Eriocheir Sinensis in Liaoning Province, Panjin Guanghe Fisheries Company Limited, Panjin; 3.College of Animal Husbandry and Veterinary, Shenyang Agricultural University, Shenyang
Abstract: Female new strain of Chinese mitten handed crab Eriocheirsinensis with body weight of (55.00±3.09)g were reared in a polyethylene plastic white bucket with a diameter of 30 cm and fed fodder containing corn, soybean meal, wheat bran and trace elements (group A), Chilled diet containing trash fish and clams (group B)and formulated diet (group C) at water temperature of 20-22 ℃ with aeration for 45 days. The Chinese mitten handed crab were paired within the three groups, that is, AA, BB, CC, AB, AC, and BC, and held in a polyethylene tube with a diameter of 30 cm and 2 cm thick sand disposed in a 120 L tank armed with a IR network gun camera (TL-IPC525C) directly above to explore the effects of diet types on fatty acid composition and fighting behavior of Chinese mitten handed crab. The results showed that 11 fatty acids were detected in muscle, 15 fatty acids in gonad, and 17 fatty acids in hepatopancreas of Chinese mitten handed crab, with predominant polyunsaturated fatty acids (PUFA) in muscle, and predominant monounsaturated fatty acids (MUFA) in hepatopancreas and gonad. The maximal fatty acids were C18:1n8, C18:2n6c, and C16:0 in the crab. There was significantly higher content of C22:6n3(DHA) in hepatopancreas and gonad in group B than that in group A and group C (P<0.05), with the maximal content of C20:5n3(EPA) in gonad in group C (P<0.05), and significantly higher content of Σn-3PUFA/Σn-6PUFA in the muscles in group C than that in group A and group B (P<0.05), which had higher fatty acid nutritional value. There were the maximal fighting frequency and fighting duration in group C (P<0.05), indicating that the Chinese mitten handed crab fed fodder had more aggressive behavior, with the maximal fighting frequency and fighting duration in the battles with the crab in group A and group B(P<0.05). The findings indicated that the Chinese mitten handed crab fed formulated diet had higher fatty acid nutritional value and was less aggressive than the crab fed fodder and Chilled diet did.
刘汉堤, 李晓东, 曹萌, 代亮, 李艺, 蒋秋月, 耿丹. 饵料种类对中华绒螯蟹脂肪酸组成及打斗行为的影响[J]. 大连海洋大学学报, 2020, 35(3): 392-398.
LIU Handi, LI Xiaodong, CAO Meng, DAI Liang, LI Yi, JIANG Qiuyue, GENG Dan. Effects of different diets on fatty acid composition and fighting behavior of Chinese mitten handed crab Eriocheir sinensis. Journal of Dalian Ocean University, 2020, 35(3): 392-398.
2020, Vol. 35 
