黄洪贵，胡振禧，黄种持，叶小军，吴妹英，黄柳婷
（福建省淡水水产研究所，福州 350002）

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。

关键词：匙吻鲟；仔鱼；延迟投饵；存活；生长

Effects of delayed feeding on survival and growth of Polyodon spathula larvae
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)

Abstract: 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.

Key words: Polyodon spathula; larvae; delayed feeding; survival; growth

基金项目：福建省科学技术厅重点项目(2008N0011)
作者简介：黄洪贵（1970－），男，高级工程师，主要从事水产增养殖与育种工作。E-mail：fjdssagui@163.com
 

(来源：《渔业现代化》2009.36(6)：25-28)