太平洋鳕仔鱼饥饿实验及不可逆生长点的确定

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 太平洋鳕仔鱼饥饿实验及不可逆生长点的确定 DOI: 10.5846/stxb201211301715 作者: 作者单位: 大连海洋大学/农业部北方海水增养殖重点实验室,大连海洋大学/农业部北方海水增养殖重点实验室,大连海洋大学/农业部北方海水增养殖重点实验室,大连海洋大学/农业部北方海水增养殖重点实验室,大连海洋大学/农业部北方海水增养殖重点实验室 作者简介: 通讯作者: 中图分类号: 基金项目: 国家863计划项目（2012AA10A413） Experimental starvation on Gadus macrocephalus and definition of the point of no return Author: Affiliation: Dalian Ocean University/Key Laboratory of North Mariculture,Ministry of Agriculture,Dalian Ocean University/Key Laboratory of North Mariculture,Ministry of Agriculture,Dalian Ocean University/Key Laboratory of North Mariculture,Ministry of Agriculture,Dalian Ocean University/Key Laboratory of North Mariculture,Ministry of Agriculture, Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:通过研究饥饿胁迫对太平洋鳕仔鱼生长、形态和行为的影响，确定太平洋鳕仔鱼最佳投饵时间及不可逆点，以期为太平洋鳕人工育苗提供科学参考。实验设饥饿组和摄食组进行研究。结果表明，在水温10.0-11.0℃时，太平洋鳕仔鱼在孵化后第5天开始摄食，此时卵黄囊容量约从初孵时的0.2402mm3降至0.0062mm3，卵黄囊体积随仔鱼生长逐渐变小。从第8日龄开始，饥饿仔鱼的全长、体长、肛前长、体高等指标与摄食组差异极显著（P < 0.01），多项生长指标出现负增长，饥饿组与摄食组仔鱼开鳔率及鳔体积差异明显，表明饥饿对仔鱼生长发育起延迟作用。太平洋鳕仔鱼初次摄食率为30%，第7天初次摄食率达90%，仅保持1d。太平洋鳕仔鱼的耐饥饿能力较差，PNR为9日龄。最佳投饵时间为5-7日龄。 Abstract:The effects of starvation on growth, morphology and behavior of Pacific cod, Gadus macrocephalus larvae were studied to determine the optimal time point of feeding and the point of no return (PNR). The results showed that the larvae starts to eat on 5-day post hatching (dph) under the water temperature 10.0℃ to 11.0℃, and the volume of yolk sac decreased from 0.2402mm3to 0.0062 mm3 during this period. Compared to the feeding group, the total length, eye diameter, body length, length before anus and body depth of the starvation group showed negative growth after 8dph.Meanwhile, the inflation rate of swim bladder and the volume of swim bladder dropped significantly in the starvation group, which indicated that starvation would lead to delay of larvae development. The initial feeding rate was 30%, and up to 90% on 7dph, holding only one day. It was concluded that the PNR was on 9dph, the optimal feeding time was around 5 to 7dph, and the resistance ability of hunger was poor in the Pacific cod larvae. 参考文献 相似文献 引证文献