长江刀鲚亲鱼强化培育及自然产卵规律研究  

INTENSIVE CULTURE AND NATURAL SPAWNING OF BROODSTOCK COILIA NASUS UNDER ARTIFICIAL FEEDING CONDITIONS

作　　者：徐钢春[1] 聂志娟[2] 杜富宽[2] 朱志祥[2] 顾若波[2] 徐跑[1,2] XU Gang-Chun NIE Zhi-Juan DU Fu-Kuan ZHU Zhi-Xiang GU Ruo-Bo XU Pao(Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China)

机构地区：[1]南京农业大学无锡渔业学院,无锡214081 [2]中国水产科学研究院淡水渔业研究中心,农业部淡水渔业和种质资源利用重点实验室,无锡214081

出　　处：《水生生物学报》2016年第6期1194-1200,共7页Acta Hydrobiologica Sinica

基　　金：公益性行业(农业)科研专项(201203065);中央级公益性科研院所基本科研业务费专项资金项目(2015JBFM17);江苏省水产三新工程重大专项(D2015-14)资助~~

摘　　要：试验研究了人工饲养条件下长江刀鲚亲鱼培育的水温及主要水化学指标、饵料投喂策略及经强化培育后刀鲚自然产卵的规律。结果表明,刀鲚亲鱼培育池周年水温变化范围为5—34℃,刀鲚常年摄食,采用"鲮鱼苗+细足米虾"的系列活饵进行饲育期、越冬期、促熟期分阶段的投喂策略,雌性亲鱼强化培育后成熟系数可达16.5%,发育较佳,总体成活率为97.6%。5—6月是刀鲚产卵的高峰期,产卵时间集中在20:00—20:30,受精率为80%—92%,试验期间收集刀鲚受精卵56.9万粒。刀鲚的产卵与水温关系密切,最适产卵水温为20—28℃。The current study investigated water temperature, chemical factors of water quality, feeding regime, and the natural spawning mechanism of Coilia nasus under intensive culture conditions. Results revealed that water temperature of culturing broodstock of C. nasus in one year was ranged from 5℃ to 34℃. The maturation rates of female broodstock reached to 16.5% while fish were fed with live fry of Cirrhinus molitorella and Caridina nilotica gracilipes,and reared with specific feeding regime during their growth periods including enhanced cultivation, over winter and induced mature. The average survival rate of the females reached 97.6%. Fish spawning time were mainly at20：00—20：30 for a peak season from May to June. The fertilization rates ranged from 80% to 92%. A total of 569000 eggs were collected during this experiment. Results indicate that water temperature is the key factor to C. nausu spawning, and the optimal water temperature for C. nasus to spawn were 20℃ to 28℃.

关 键 词：长江刀鲚 亲鱼 强化培育 自然产卵 

分 类 号：S965[农业科学—水产养殖]