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当前位置: 首页 > 文章 > 延迟投饵对匙吻鲟仔鱼存活与生长的影响 渔业现代化 2009,36 (6) 25-28
Position: Home > Articles > Effects of delayed feeding on survival and growth of Polyodon spathula larvae Fishery Modernization 2009,36 (6) 25-28

延迟投饵对匙吻鲟仔鱼存活与生长的影响

作  者：
黄洪贵;胡振禧;黄种持;叶小军;吴妹英;黄柳婷
单  位：
福建省淡水水产研究所
关键词：
匙吻鲟;仔鱼;延迟投饵;存活;生长
摘  要：
在(22±0.5)℃水温条件下,通过饥饿试验,研究了延迟投饵对匙吻鲟(Polyodon spathula)仔鱼存活与生长的影响。结果表明:延迟1~2 d投饵对仔鱼存活的影响不显著;延迟3 d以上投饵,仔鱼成活率显著下降;完全饥饿条件下,仔鱼半致死时间为11日龄,全部死亡时间为17日龄;延迟1 d投饵对仔鱼生长的影响不显著,延迟2 d以上投饵对仔鱼生长的影响显著。匙吻鲟仔鱼开口摄食期没有混合营养期,从初次开口摄食到饥饿半致死之间的间隔仅4 d。因此,匙吻鲟仔鱼初次投喂的最适时间建议在开口摄食后的2 d之内。
译  名：
Effects of delayed feeding on survival and growth of Polyodon spathula larvae
作  者：
HUANG Hong-gui,HU Zhen-xi,HUANG Zhong-chi,YE Xiao-jun,WU Mei-ying,HUANG Liu-ting(Fresh-water Fisheries Research Institute of Fujian Province,Fujian Fuzhou 350002,China)
关键词：
Polyodon spathula;larvae;delayed feeding;survival;growth
摘  要：
In laboratory condition Polyodon spathula larvae were reared at the water temperature of(22±0.5) ℃ to exam the effects of delayed feeding on survival and growth under starvation condition.The results showed that the survival rate was not affected when the initial feeding was delayed 2 days,and then,decreased significantly with increasing of delayed feeding time.The time of 50% and 100% mortality for the starvation larvae happened at the age of 11 days and 17 days respectively.The growth rate was not affected when the initial feeding was delayed 1 day,and then,it decreased great significantly with increasing of delayed feeding time.There was no mixed feeding stage for Polyodon spathula larvae,and there were only 4 days from the initial feeding to 50% mortality time for the starvation larvae.Therefore,it is suggested that the most suitable firstly feeding time of Polyodon spathula larvae should be within 2 days after the larvae started feeding.

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