文章摘要
鲍宝龙.延迟投饵对真鲷,牙鲆仔鱼早期阶段摄食,存活及生长的影响[J].水产学报,1998,22(1):
延迟投饵对真鲷,牙鲆仔鱼早期阶段摄食,存活及生长的影响
EFFECT OF DELAYED FEEDING ON FEEDING ABILITY, SURVIVAL AND GROWTH OF RED SEA BREAM AND OLIVE FLOUNDER LARVAE DURING EARLY DEVELOPMENT
投稿时间:2014-05-07  修订日期:2014-05-07
DOI:
中文关键词: 真鲷 牙鲆 仔鱼 延迟投饵 摄食 存活 生长 育苗
英文关键词: Pagrosomus major , Paralichthys olivaceus , Larvae, Delayed feeding , Feeding ability, Survival, Growth
基金项目:
作者单位地址
鲍宝龙 上海水产大学渔业学院 上海水产大学渔业学院
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中文摘要:
      试验结果表明:(1)2日龄真鲷、牙鲆仔鱼初次摄食,在6~7日龄和5~6日龄,不能建立外源性营养的仔鱼分别进入PNR期,而卵黄囊均在此前1~2天已耗尽。混合营养期分别为3~4天和1~2天。(2)真鲷和牙鲆仔鱼在不同饥饿阶段初次摄食率的变化式型是:开始较低,此后逐步上升,高峰期出现在卵黄囊接近耗尽时,此后开始下降。记录到的最高初次摄食率分别为86.7%和35%。(3)牙鲆仔鱼体长的增长率随延迟投饵天数的增加而降低,牙鲆仔鱼的存活率与延迟投饵天数的关系也是如此。延迟2天投饵对真鲷仔鱼的存活率影响不大。
英文摘要:
      The ef fect o f star vat io n to the growth, feeding abi lity and sur viva l o f red se a bream ( Pagrosomus maj or ) a nd oliv e f lounder ( Paral ichthys ol ivaceus ) larv ae dur ing early deve lopment w ere ex amined in the delay ed feeding tr ials. Re d sea bream larv ae arriv ed the point o f no r eturn ( PNR) at 6- 7 days of age, it s y olk exhausted at 5- 6 days of age. The PNR of o live f lounder larv ae w as one day o r two to three days ahead of yo lk exhaust io n. The initia l feeding ra te w as lowe r, then slow ly increased to the peak w hen the yo lk almost ex hausted, af ter that , it decr eased. The hig hest initia l feeding r ate o f r ed sea bre am w as 86. 7%, and o live f lounder w as o nly 35%. The grow th and surv ival rates decreased w ith increasing o f feeding-delayed t ime. The sur viva l r ate w as not af fected w hen the init ial feeding wa s at the ag e o f 3 days for red sea br eam.
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