An Evaluation on the Ratio of Plant to Animal Protein in the Diet of Juvenile Sea Cucumber(Apostichopus japonicus):Growth,Nutrient Digestibility and Nonspecific Immunity

作     者：BAO Pengyun LI Xiaoyu XU Yongping 

作者机构：School of Life Sciences and BiotechnologyDalian University of TechnologyDalian 116024China School of Fisheries and Life SciencesDalian Ocean UniversityDalian 116023China Ministry of Education Center for Food Safety of Animal OriginDalian 116620China Liaoning Food Safety of Animal Origin Innovation TeamDalian 116024China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2018年第17卷第6期

页      面：1479-1486页

核心收录：

学科分类：07[理学] 

基　　金：financially supported by the Natural Public Sciences and Technology Research Funds Projects of Ocean(201405003-3) 

主　　题：Apostichopus japonicus plant protein animal protein growth digestibility nonspecific immunity 

摘      要：This study was conducted to evaluate the effects of plant/animal(P/A) protein ratios(viz.1:4, 1:3, 1:2, 1:1,2:1, 3:1, 4:1) on growth performance, body composition, apparent digestibility of diets, and nonspecific immunity of juvenile sea cucumber(Apostichopus japonicus). Sea cucumbers were divided into 21 plastic tanks, and each tank was stocked with 15 individuals(initial weight: about 23.73 g). Each feed was allocated to three replicates of sea cucumbers. The feeding experiment lasted for 50 days. Results indicated that weight gain rate(WGR) and body wall weight(BWW) significantly increased as dietary ratio of P/A increased from 1:4 to 3:1, and then decreased significantly with further increase of this ratio(P 0.05). The apparent digestibility of dry matter, protein and lipid increased with ratio of P/A increasing from 1:4 to 2:1(P 0.05), and then decreased with further increase of this ratio. Correspondingly, activities of trypsin and amylase were significantly increased as P/A increased from 1:4 to 2:1(P 0.05). The activities of SOD and CAT showed a similar trend with WGR, with the highest value observed in the ratio of 1:2 and 1:1, respectively. Results above showed that moderate or relatively higher ratio of P/A protein(1:1-3:1) significantly increased the growth performance, apparent digestibility, and nonspecific immunity of sea cucumber. This will contribute to improving the feed formulation for juvenile cucumbers.