摘要
【目的】研究饥饿胁迫和不同开口饵料对大刺鳅仔鱼摄食、生长和成活率的影响,为大刺鳅早期苗种培育技术的改进提供参考依据。【方法】采用实验生态学方法,测定饥饿对初孵仔鱼卵黄囊、油球的吸收和死亡不可逆点(PNR);选用枝角类、丰年虫无节幼体、蛋黄、虾奶粉和A#鱼苗开口料作为大刺鳅仔鱼开口饵料,投喂24 d,分析不同开口饵料对大刺鳅仔鱼生长的影响。【结果】在水温(27.0±1.5)℃的条件下,仔鱼6日龄开口摄食,初次摄食率达100%,PNR发生在14~15日龄,其摄食能力和饥饿耐受性相对较强,饥饿延缓了仔鱼对卵黄囊和油球的吸收;仔鱼能够摄食枝角类和丰年虫无节幼体等活饵,投喂1 d后的开口摄食率达100%,且具有较快的生长速度和较高的成活率;而仔鱼不摄食蛋黄、虾奶粉和A#鱼苗开口料等人工饵料,其生长、成活率与饥饿组无差异(P>0.05)。【结论】枝角类和丰年虫无节幼体是大刺鳅仔鱼适宜的开口饵料。
【Objective】Effects of starvation stress and different initial starting forages on the feeding,growth and survival rate of Mastacembelue armatus larvae were studied with a reference to the aquaculture.【Method】Absorptions on yolk sac and fat globules as well as the point of no return(PNR)of starved larvae were observed by methods of experimental ecology.Eel larvae fed with either freshwater cladocera,nauplius of brine shrimp,egg yolk,crustacean powder or prepared Larvstart-A formulation for 24 d were also under continuous observations.【Result】The feeding started on the eel larvae at 6-day-old in(27.0±1.5)℃water with an initial feeding rate of 100%.The PNR of starved larvae occurred between 14-d and 15-d of age.Starvation delayed the absorptions on yolk sac and fat globules by the larvae.The consumption on live freshwater cladocera and shrimp nauplius began one day after feeding with 100%feeding rate,and followed by rapid growth with a high survival rate.There was no significant difference on the growth and survival rate between the starved larvae and those fed on the artificial forages such as egg yolk,crustacean powder or Larvstart-A(P>0.05),which were could not be consumed.【Conclusion】It appeared that the ideal starting diet for M.armatus larvae would be the freshwater cladocera and brine shrimp nauplius.
作者
钟全福
ZHONG Quan-fu(Freshwater Fisheries Research Institute of Fujian Province,Fuzhou,Fujian 350002,China)
出处
《福建农业学报》
CAS
CSCD
北大核心
2019年第12期1411-1418,共8页
Fujian Journal of Agricultural Sciences
基金
福建省科技计划公益类专项（2015R1002-1、2016R1002-1、2017R1002-2）
关键词
大刺鳅
仔鱼
饥饿
开口饵料
摄食率
生长
成活率
Masracembelue armatu
larvae
starvation
starting forage
feeding rate
growth
survival rate
作者简介
钟全福(1964−),男,硕士,副研究员,主要从事水产养殖及病害防控(E-mail:zhongquanfu@126.com)。
