Effects of Water Temperature, Illumination and Feed Oil Addition on the Survival of Larvae in the Mass Seed Production of the Sevenband Grouper, Epinephelus septemfasciatus
Effects of Water Temperature, Illumination and Feed Oil Addition on the Survival of Larvae in the Mass Seed Production of the Sevenband Grouper, Epinephelus septemfasciatus
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七带石斑鱼批量制种中水温、光照和饲料油添加量对幼虫存活的影响
DOI：
10.11233/aquaculturesci1953.51.49
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
M. Yoshioka
中科院分区：
文献类型：
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作者：
Y. Tsuchihashi;I. Kuriyama;Yoshimi Kuromiya;M. Kashiwagi;M. Yoshioka
采用生存活性指数（SAT）测定了七带石斑鱼（Epinephelus septemfasciatus）成苗过程中幼虫的活性。为了提高七星石斑鱼幼鱼的成活率，研究了养殖水体中水温、光照和添加饲料油的影响。SAI与开口时存活率有明显的相关性（r=0.862, p<0.01）。结果表明，SAT可作为幼虫活性的有效指标。在水温检测中，25.0•Ž条件下的幼虫孵化后10 d存活率高于自然水温（19.5 ~ 20.5•Ž）。光照试验中，24小时连续光照处理高于自然日光照处理。在饲料油添加试验中，添加处理优于不添加处理。在这些良好条件下，大量生产的SAT值（bbb10）较高的苗产幼虫孵化后10 d存活率为36.4 ~ 68.7%。这比其他种苗生产机构报告的11.7-35.0%高出约2倍。
Survival Activity Index (SAT) was measured to judge the activity of the larvae in the mass production of seedlings process of sevenband grouper, Epinephelus septemfasciatus. SAT was examined for the effects of the water temperature, illumination and feed oil addition to the breeding water for the purpose of survival rate improvement of larvae and juveniles of Epinephelus septemfasciatus. A clear correlation was recognized between SAI and the survival rates at the time of mouth opening (r=0.862, p<0.01). SAT was concluded as an effective index of the activity of the larvae. As for the larval survival rate at 10 days after hatching larvae reared at 25.0•Ž had a higher survival rate than the natural water temperature (19.5-20.5•Ž) in the water temperature examination. The 24 hour continuous lighting treatment was higher than the natural day lighting treatment in the lighting examination. The addition treatment was higher than the non-addition treatment in the feed oil addition examination. Survival rate at 10 days after hatching in the mass production of seedling produced larvae showing higher SAT values (>10) in these good conditions was 36.4-68.7%. This is about 2 times higher than the 11.7-35.0% reported from other seed seedling production establishments.