小黄鱼规模化人工育苗试验  

Experiment on Large-Scale Artificial Seedling Breeding of Larimichthys polyactis

作　　者：徐万土 楼宝 陶顺顺 陈裕 杨辉 曾肖 徐芳君 詹炜 XU Wan-tu;LOU Bao;TAO Shun-shun(Gangwan Aquatic Fingerlings Limited Company of Xiangshan,Xiangshan 315700;Institute of Hydrobiology,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China)

机构地区：[1]象山港湾水产苗种有限公司,浙江象山315700 [2]浙江省农业科学院水生生物研究所,浙江杭州310021

出　　处：《浙江海洋大学学报（自然科学版）》2022年第2期108-112,共5页Journal of Zhejiang Ocean University：Natural Science

基　　金：浙江省科技计划(2021C02055,2017C02013);象山县科技计划农业科技类重大项目(2019C0001)。

摘　　要：2019-2021年在浙江省宁波市象山港湾水产苗种有限公司育苗场,以人工培育的11780尾性成熟小黄鱼为亲本,通过注射促黄体释放激素类似物(LRH-A2)进行催产,在15~16℃条件下,效应时间36~48 h;3年共获得受精卵3.70×10^(7)粒,在水温17℃、盐度24~25、pH 8.0~8.3、光照500~1000 lx、微充气条件下,共孵化出仔鱼苗2.04×10^(7)尾,孵化率分别为37.4%、61.6%、74%;鱼苗培育在水温17~21℃、pH 7.8~8.3、盐度21~23、光照500~1000 lx、充气条件下进行,依次投喂轮虫、卤虫无节幼体和颗粒饲料,经过40~47 d培育得到体长2.8~3.8 cm鱼苗4.5×10^(6)尾,育成率分别为17.4%、22.6%、25.4%。小黄鱼育苗应注重亲鱼的强化培育、饵料系列的转换与搭配及日常管理。本试验结果可为小黄鱼规模化生产性育苗技术推广提供参考。From 2019 to 2021,11780 offspring of Larimichthys polyactisin Gangwan Aquatic Fingerlings Limited Company of Xiangshan were cultured and used as parents.The oxytocin was induced by injection of LRH-A2.Under the condition of 15-16℃,the effect time was 36-48 h.A total of 3.70×10^(7)fertilized eggs were obtained in three years.Under the conditions of water temperature 17℃,salinity 24-25,pH 8.0-8.3,light 500-1000 lx and micro-inflatable,a total of 2.04×10^(7)larvae were hatched,and the hatching rates were 37.4%,61.6%and 74%,respectively.Larvae were cultured under water temperature 17-21℃,salinity 21-23,pH 7.8-8.3,light 500-1000 lx light and inflatable conditions.The rotifers,artemia nauplii and pellet feed were fed sequentially.After 40-47 days,4.5×10^(6)larvae with body length of 2.8~3.8 cm were obtained.The fertility rates were 17.4%,22.6%and 25.4%,respectively.In the breeding of L.polyactis,we should pay attention to the intensive cultivation of parents fish,the conversion and matching of bait series and daily management.The results of this experiment can provide a reference for the popularization of large-scale productive seedling breeding technology of L.polyactis.

关 键 词：小黄鱼 规模化育苗 孵化率 育成率 

分 类 号：S965.323[农业科学—水产养殖]