投喂频率对工厂化循环水养殖星康吉鳗生长、生理指标及其水质的影响  

Effects of Feeding Frequency on the Growth,Physiological Indices,and Water Quality of Conger myriaster Reared in Industrial Recirculating Aquaculture Systems

作　　者：赵新宇 史宝[2] 王成刚 程汉良 马晓东 ZHAO Xinyu;SHI Bao;WANG Chenggang;CHENG Hanliang;MA Xiaodong(School of Marine Science and Fisheries,Jiangsu Ocean University,Lianyungang 222005,China;Laboratory for Marine Fisheries Science and Food Production Processes,Key Laboratory of Marine Fisheries and Sustainable Development,Ministry of Agriculture and Rural Affairs,Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Qingdao 266071,China;Haiyang Yellow Sea Fisheries Co.,Ltd,Yantai 265100,China)

机构地区：[1]江苏海洋大学海洋科学与水产学院,江苏连云港222005 [2]中国水产科学研究院黄海水产研究所农业农村部海洋渔业与可持续发展重点实验室海洋渔业科学与食物产出过程功能实验室,山东青岛266071 [3]海阳市黄海水产有限公司,山东烟台265100

出　　处：《渔业科学进展》2024年第2期233-244,共12页Progress in Fishery Sciences

基　　金：国家重点研发计划(2019YFD0900503);山东省重点研发计划(2021LZGC028);中国水产科学研究院黄海水产研究所基本科研业务费(20603022021004,2020TD47);国家现代农业产业技术体系(CARS-47)共同资助。

摘　　要：本研究采用生理学和实验生态学方法探究了工厂化循环水养殖模式下,不同投喂频率对星康吉鳗(Conger myriaster)生长、生理指标以及水质因子的影响。选用初始体重为(150.64±5.43)g的星康吉鳗为研究对象,实验共设2组,分别为1次/天(T1组)、2次/天(T2组),每组3个重复,实验周期为70d。实验每14d检测各养殖池实验鱼平均体重和循环水系统水质指标;实验结束时,采集星康吉鳗血液、组织相关样品,用于生长、生理指标的测定与分析。结果显示,T2组终末体重(FBW)、终末体长(FBL)、增重率(WGR)、特定生长率(SGR)显著高于T1组(P<0.05),T1组饲料系数(FCR)显著高于T2组(P<0.05)。T1组血清丙二醛(MDA)显著高于T2组(P<0.05),T2组肝脏谷草转氨酶(AST)、肝脏谷丙转氨酶(ALT)、肠道胰蛋白酶(TPS)显著高于T1组(P<0.05)。T1组、T2组出口水NH_(4)^(+)-N、NO_(2)^(-)-N 24 h变化中分别有1处(24:00)和2处峰值(20:00、次日8:00);2个实验组出口水24 h内NH_(4)^(+)-N与生物滤池出口水差异显著(P<0.05);生物滤池出口水NO_(2)^(-)-N在04:00、08:00显著低于其他2个实验组出口水(P<0.05);T2组2种指标的24 h变化幅度均小于T1组。整个实验周期内各水质指标均维持在安全养殖范围内,其中,在第70天时,T2组总氮(TN)、总磷(TP)显著高于T1组(P<0.05);生物滤池对各项水质指标处理效果各不相同,其中,对NH_(4)^(+)-N的处理效果最佳,最高可达54.23%。基于上述结果,星康吉鳗幼鱼工厂化循环水养殖模式中,2次/天的投喂效果优于1次/天。相关结果为星康吉鳗工厂化循环水养殖模式中适宜的投喂策略提供了理论参考。The whitespotted conger(Conger myriaster)is an important fish species with high economic value in China and Japan owing to its high nutritional content.It occupies an important position in marine-eel export in China.C.myriaster has the potential to be artificially cultured and has promising economic prospects.Thus,there is growing international interest in C.myriaster research.Indeed,to meet the demands of domestic and foreign markets,artificial culturing of C.myriaster is urgently required.However,at present,there is no report on the research of C.myriaster reared in industrial recirculating aquaculture systems.Feeding frequency has been reported to affect feed intake and growth performance in a number of fish species.Feed management in terms of optimization of feeding frequency has emerged as one of the crucial areas of research in the field of aquaculture.Overfeeding and leftover food disrupts the water quality,while inadequate food supply has direct impact on production cost.Traditional flow through systems uses large volumes of water,and intensified aquaculture has drawbacks,such as large amount of discharged waste from effluent water.Among the excreted nutrients,nitrogen and phosphorus constitute the largest proportion.Sustainability with low environmental impacts is one of the concerns when developing aquaculture systems.Based on the concepts of reduced water consumption and efficient water management,recirculating aquaculture systems offer the possibility of creating a sustainable future for fish production.Thus,a 70-day experiment was conducted to investigate the effects of different feeding frequencies and water quality on the growth performance and physiological and biochemical indices of C.myriaster[body weight:(150.64±5.43)g]reared in industrial recirculating aquaculture systems;physiological and ecological methods were used in this study.The experiment comprised two feeding frequency groups,feeding once(group T1)and twice(group T2)per day,and each treatment group had three replicates.The average bo

关 键 词：星康吉鳗 投喂频率 循环水养殖 生长 生理 水质 

分 类 号：S967.6[农业科学—水产养殖]