Effect of Fish Meal Replaced by Feed Grade Poultry By-Product Meal on Growth Performance, Intestinal Digestive Enzyme Activities and Serum Biochemical Indices of Rice Field Eel Monopterus albus
CAO Xiaoli, HU Yi, HU Yajun, CHEN Kaijian
Hunan Engineering Research Center for Utilization of Characteristics of Aquatic Resources, Hunan Agricultural University, Changsha 410128, China
Abstract：An 8-week feeding trial was conducted to evaluate the effect of replacing fish meal (FM) with feed grade poultry by-product meal on growth performance and physiological indicators of rice field eel Monopterus albus. In this experiment, healthy rice field eel with an initial body weight of (26.67±0.05) g were reared in a cage of 1.5 m×2.0 m×1.5 m covered with alligator weed Alternanthera philoxeroides more than 90% of the water surface, and fed 5 kinds of isotonic isoenergetic diets prepared by fish meal replacement by various levels of poultry by-product meal: fish meal group (control group), 15% substitution group (group 15%), 30% substitution group (group 30%), 45% substitution group (group 45%) and 60% substitution group (group 60%) with 3 replicates per group and 60 fish per replicate to evaluate the effect of using feed-grade poultry by-product meal instead of fish meal on rice field eel growth, intestinal digestive enzyme activity, and serum biochemical indicators. Results showed that the significant decrease in weight gain rate, and significant increase in levels of C3 and C4 were observed in the fish fed the diets with the replacement ratio of over 30% (P<0.05). The fish fed the diets with the high replacement ratio had significantly higher food conversion ratio, and contents of crude fat and triglyceride (TG) than the fish fed the control diet did (P<0.05), significantly higher low-density lipoprotein contents in group 30% and group 45% (P<0.05). There was lower intestinal lipase activity in all the groups (P<0.05), except for the group 45%, without significant difference. Albumin content was found to be lower in each treatment group than that in the control group (P>0.05). There were significantly higher GPT activities in group 15% and group 30% than that in the control group (P<0.05). To sum up, no negative effect on the growth performance and physiological function was observed in the rice field eel fed the diet with less than 30% fish meal replaced by the feed grade poultry by-product meal under the conditions of this experiment.
曹晓莉,胡毅,胡亚军,陈开健. 饲料级鸡肉粉对黄鳝生长、消化酶及血清生化指标的影响[J]. 水产科学, 2021, 40(2): 196-202.
CAO Xiaoli, HU Yi, HU Yajun, CHEN Kaijian. Effect of Fish Meal Replaced by Feed Grade Poultry By-Product Meal on Growth Performance, Intestinal Digestive Enzyme Activities and Serum Biochemical Indices of Rice Field Eel Monopterus albus. 水产科学, 2021, 40(2): 196-202.
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2021, Vol. 40 
