密斯特黄彩鲶仔、稚、幼鱼的生长与发育研究  

Study on growth and development of larva,juvenile and young fish of Mystus sp.

作　　者：房伟平[1] 林永贺[1] 陈振龙[1] 邹记兴[1] 

机构地区：[1]华南农业大学动物科学学院,广州510642

出　　处：《淡水渔业》2012年第2期66-71,共6页Freshwater Fisheries

基　　金：清远市科技计划项目(2010A013);华南农业大学大学生科技创新项目(2008DK32);广州市白云区科技计划项目(2007-SZ-44)

摘　　要：在水温22～24℃,pH7.0左右的人工培育条件下,对密斯特黄彩鲶(Mystus sp.)仔、稚、幼鱼的形态特征和生长发育进行了观察与研究。密斯特黄彩鲶的鱼苗发育分为卵黄囊期仔鱼期(初孵至第5天)、晚期仔鱼期(第6～10天)、稚鱼期(第11～20天)和幼鱼期(第20天以后)。初孵仔鱼平均全长5.12 mm,卵黄囊体积1.63 mm3;仔鱼第3天开始摄食,第5天卵黄囊被完全吸收,鱼苗主要外部器官主要集中在晚期仔鱼阶期和稚鱼期内形成。仔鱼在饥饿状态下最高初次摄食率出现在出膜后第6天,为84.0%,其饥饿的不可逆点则为出膜后第8天,第8天以后即进入不可逆PNR期,至第11天绝大部分饥饿仔鱼死亡。At the water temperature of 22～24 ℃ and pH around 7.0,the growth and development of larva,juvenile and young fish of Mystus sp.were observed.The results showed that development of this species could be divided into four phases,including pre-larva（from hatching to the 5th day）,post-larva（the 6th day to the 10th day）,juvenile（the 11th to the 20th day） and young fish（after the 20th day） respectively.The first hatching larvae were only 5.12 mm long with a yolk-sac of 1.63 mm3.The larvae began to eat on the 3rd day and yolk-sacs were fully assimilated on the 5th day after hatching.The exterior organs developed mainly in the stage of late-stage larva and the largest inital feeding rate of larvae was 84.0% which appeared on the 6th day and the point-of-no-return was on the 8th day after hatching.From then,the unfed larvae entered into the stage of PNR and most died on the 11th day.

关 键 词：密斯特黄彩鲶(Mystus sp.) 仔、稚、幼鱼 生长与发育 初次摄食率 

分 类 号：S965.128[农业科学—水产养殖] Q112[农业科学—水产科学]