Effect of photoperiod manipulation on the growth performance and stress response of juvenile red sea bream (Pagrus major)
Effect of photoperiod manipulation on the growth performance and stress response of juvenile red sea bream (Pagrus major)
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DOI：
10.1016/j.aquaculture.2006.03.048
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发表时间：
2006-08-31
期刊：
影响因子：
4.5
通讯作者：
Kumai, Hidemi
中科院分区：
文献类型：
--
作者：
Biswas, Arnal K.;Seoka, Manabu;Kumai, Hidemi
以真鲷（Pagrus major，体重1 ~ 30 g）幼鱼为材料，在4种光照周期（6L：6D、12 L：12 D、16 L：8D和24 L：0 D）下，以1500 1x的恒定光照强度进行水面饲养，研究真鲷幼鱼的生长性能和应激反应。在8周的实验中，鱼被喂食商业饮食至明显饱食。24 L：0 D光周期组的增重和特定生长率（SGR）显著高于16 L：8D、6L：6D和12 L：12 D光周期组（P < 0.05）。摄食量在24 L：0 D组显著高于6L：6D、16 L：8D和12 L：12 D组（P < 0.05）。24 L：0 D和16 L：8D光周期下的饲料转化效率差异不显著，但均显著高于6L：6D和12 L：12 D光周期下的饲料转化效率。实验结束时，各处理组的红细胞压积、血浆皮质醇和血糖水平均无显著差异。结果表明，使用连续（24 L：0 D）光周期可以显着刺激1 ~ 30 g真鲷幼鱼的生长性能，而鱼类没有任何可测量的显着应激反应。(c)2006 Elsevier B. V.保留所有权利。
Juvenile of red sea bream (Pagrus major, body weight 1 similar to 30 g) were reared under four photoperiods (6L:6D, 12L 12D, 16L:8D and 24L:0D) with constant light intensity 1500 1x on the water surface to investigate their growth performance and stress response. Fish were fed a commercial diet to apparent satiation for 8 weeks of the experiment. Significantly higher weight gain and specific growth rates (SGR) were observed in fish exposed to a 24L:0D photoperiod followed by 16L:8D, 6L:6D and 12L:12D photoperiods (P < 0.05). Food intake was significantly higher in fish exposed to 24L:0D followed by 6L:6D, 16L:8D and 12L:12D photoperiods (P < 0.05). There was no significant difference in the feed conversion efficiency (FCE) between fish exposed to 24L:0D and 16L:8D photoperiods, but the FCE in both photoperiods was significantly higher than that of 6L:6D and 12L: 12D photoperiods. There were no significant differences in hematocrit levels and plasma levels of cortisol and glucose among the treatments at the end of experiment. The results demonstrated that the growth performance of juvenile red sea bream reared from 1 to 30 g can be stimulated significantly by using a continuous (24L:0D) photoperiod without any measurable significant stress response in fish. (c) 2006 Elsevier B.V. All rights reserved.