The effect of different feeding rates on growth, feed efficiency and immunity of juvenile Penaeus monodon
文献类型: 外文期刊
作者: Niu, Jin 1 ; Chen, Xu 2 ; Zhang, Yun-Qiang 3 ; Tian, Li-Xia 1 ; Lin, Hei-Zhao 2 ; Wang, Jun 2 ; Wang, Yun 2 ; Liu, Yong-J 1 ;
作者机构: 1.Sun Yat Sen Univ, Sch Life Sci, Inst Aquat Econ Animals, Nutr Lab, Guangzhou 510275, Guangdong, Peoples R China
2.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Minist Agr, Key Lab Aquat Prod Proc, Guangzhou, Guangdong, Peoples R China
3.Guangdong Yuehai Feed Grp Co Ltd, Zhanjiang 524017, Peoples R China
关键词: Penaeus monodon;Feeding rate;Growth;Apparent digestibility coefficient;Immunity
期刊名称:AQUACULTURE INTERNATIONAL ( 2020影响因子:2.235; 五年影响因子:2.616 )
收录情况: SCI
摘要: Juvenile Penaeus monodon weighing about 1.46 g were fed on a diet for 8 weeks at various daily feeding rates of 3, 4, 5, 6, 7, 8 and 9 % of their body weight (BW), and the growth, feed utilization, blood parameters and non-specific immunity were determined. Forty shrimp per tank were distributed into 28 500-L fiberglass tanks, and they were fed four times 1 day. After the 56-day trial, survival was over 90 % and was not significantly affected by feeding rates. Final weight, weight gain and specific growth rates gradually increased with increasing feeding rate up to 8 % and then kept constant. Feed conversion rate (FCR: 1.08-2.20) from 9 % feeding rate treatment was significantly higher than that from 3 to 7 % feeding rate treatments (P < 0.05) but without difference to 8 % feeding rate treatment. Protein efficiency ratio linearly decreased with the increase in feeding rate. The apparent digestibility coefficients for dry matter, protein (APD) and energy (AED) of 3 % and 4 % feeding rate treatments were significantly lower than that of 5-9 % feeding rate treatments (P < 0.05). Activities of plasma glutamic oxaloacetic transaminase and glutamic pyruvic transaminase and concentrations of plasma cholesterol, triacylglycerol and low-density lipoprotein were increased with increasing feeding rate. Superoxide dismutase activities in hepatopancreas of shrimp from 3 to 5 % feeding rate treatments were significantly higher than that of shrimp from 7 to 9 % feeding rate treatments (P < 0.05) but without significant difference with 6 % feeding rate treatment. Nonlinear regression analysis of SGR indicated that the optimum feeding rate of juvenile P. monodon is 7.5 % BW/day.
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