Effects of Green Grass Food and Compound Feed on Growth, Digestion and Fish Quality of Hybrid between Bluntnose Black Bream Megalobrama amblycephala and Topmouth Culter Culter alburnus
LIN Xin, ZHENG Guodong, SU Xiaolei, CHEN Jie, ZOU Shuming
Genetics and Breeding Center for Blunt Snout Bream, Ministry of Agriculture and Rural Affairs, Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China
Abstract：In order to compare the growth, digestion and meat quality of hybrid bluntnose black bream Megalobrama amblycephala ♀ × topmouth culter Culter alburnus ♂ (MC)after ingesting green grass food and compound feed, MC juvenile fish were fed grass food and compound feed for 30 days, and then measured for their growth, muscle nutrients, digestive enzyme activity, digestive tract structure, and flesh taste and other indicators. The results showed that (1)there was significantly lower growth index in fish fed ryegrass Lolium perenne than that in the fish fed the compound feed, but the intestinal body index and length of the intestine were significantly higher than those in the compound feed group (P<0.05). (2)There was higher moisture in the fish in the green feed group than that in the compound feed group, but the contents of crude fat, crude protein and crude ash were lower than those in the compound feed group (P<0.05). And the muscle fiber area in the green feed group was also smaller than that in the compound feed group.(3)The intestinal trypsin and lipase activities were lower in the green feed group than those in the compound feed group, but the amylase activity was higher. The hybrid in compound feed group had more liver fat accumulation and intestinal fold goblet cells than the fish in green feed group did.(4)Electronic tongue analysis showed that the descending order of the two-dimensional intercept size of the principal component analysis (PCA) was green feed group>compound feed group.(5)Nucleotide analysis showed that the taste nucleotide of fish meat was greatly affected by feeding habits. There was higher content of 5′-AMP (sweet) and 5′-IMP (fresh) in the green feed group than that in the compound feed group, while the content of Hx (bitter) relatively small. In summary, green feed and compound feed had a greater impact on the growth and digestion of MC and the taste of fish. Fish in high-protein compound feed grew faster, while those in green feed group had better taste. The digestive enzyme activity in the intestine was changed according to the different foods ingested.
林欣, 郑国栋, 苏晓磊, 陈杰, 邹曙明. 黑麦草与配合饲料对鲂鲌杂交种生长、消化及鱼肉品质的影响[J]. 水产科学, 2022, 41(5): 769-777.
LIN Xin, ZHENG Guodong, SU Xiaolei, CHEN Jie, ZOU Shuming. Effects of Green Grass Food and Compound Feed on Growth, Digestion and Fish Quality of Hybrid between Bluntnose Black Bream Megalobrama amblycephala and Topmouth Culter Culter alburnus . 水产科学, 2022, 41(5): 769-777.
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2022, Vol. 41 
