俄罗斯鲟仔鱼初次摄食时间对生长及存活的影响  

Effects of the first feeding timing on the growth and survival of Russian sturgeon (Acipenser gueldenstaedtii) larvae.

作　　者：张涛[1] 庄平[1] 章龙珍[1] 夏永涛 高露姣[1] 王斌 田美平[3] 

机构地区：[1]中国水产科学研究院东海水产研究所农业部海洋与河口渔业重点实验室,上海200090 [2]杭州千岛湖鲟龙科技发展有限公司,杭州330127 [3]上海海洋大学生命科学与技术学院,上海200090

出　　处：《生态学杂志》2009年第3期466-470,共5页Chinese Journal of Ecology

基　　金：中央级公益性科研院所基本科研业务费专项(中国水产科学研究院东海水产研究所)(2007M01);国家高技术研究发展计划项目(2008AA10Z227);农业科技成果转化项目(2008GB23260408);浙江省重大科技专项(2007C12026);上海市教育委员会E-研究院建设资助项目(E03009)

摘　　要：以人工繁育的俄罗斯鲟仔鱼为对象,采用实验生态学方法,研究了初次摄食时间对生长及存活的影响。结果表明:在水温17.4℃下,仔鱼在9～10日龄初次摄食,初次摄食前投喂对俄罗斯鲟仔鱼的生长和存活无显著性影响,延迟2d以上初次摄食对生长影响明显,存活率在18日龄初次摄食时显著下降,24日龄时饥饿仔鱼全部死亡;23～24日龄时仔鱼如不能建立外源营养即达到饥饿不可逆点(PNR)。人工养殖条件下,俄罗斯鲟仔鱼必须在初次摄食后14d内建立起主动摄食能力才能保证其仔鱼的正常发育、生长和存活。The effects of the first feeding timing on the growth and survival of artificially breeding Russian sturgeon Acipenser gueldenstaedtii larvae at the age of 6, 8, 10, 12, 14, 16, 18, 20, and 22 days were examined at 17.4℃ under laboratory conditions. The larvae started first feeding at the age of 9-10 days; while before this age, feeding did not provide any advantage. Up to two days delay of the first feeding affected the growth and survival of larvae significantly. The survival rate of the larvae was significant lower when the first feeding timing was at the age of 18 days than at the age of 6-16 days, and no larvae could survive when the first feeding timing was at the age of 24 days. The larvae achieved the point of no return （PNR） at the age of 23-24 days when the exogenous feeding could not be set. Under artificial breeding conditions, feeding larvae should be started within 14 days after the first feeding timing to avoid the potential starvation mortality and get better growth.

关 键 词：俄罗斯鲟 仔鱼 初次摄食 摄食率 不可逆点 生长 存活 

分 类 号：S917.4[农业科学—水产科学]