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Effects of Photoperiod on Survival, Growth, Physiological, and Biochemical Indices of Redclaw Crayfish (Cherax quadricarinatus) Juveniles

文献类型： 外文期刊

作者： Nie, Xiangxing 1 ; Huang, Cuixue 1 ; Wei, Jie 2 ; Wang, Yakun 2 ; Hong, Kunhao 2 ; Mu, Xidong 3 ; Liu, Chao 3 ; Chu, Zhangjie 1 ; Zhu, Xinping 2 ; Yu, Lingyun 2 ;

作者机构： 1.Zhejiang Ocean Univ, Sch Fishery, Zhoushan 316000, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resources Applicat, Minist Agr & Rural Affairs, Guangzhou 510380, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst,Minist Agr & Rural, Guangdong Modern Recreat Fisheries Engn Technol Ct, Key Lab Prevent & Control Aquat Invas Alien Specie, Guangzhou 510380, Peoples R China

关键词： aquaculture; circulating water culture; environmental factor; body color; gene expression

期刊名称：ANIMALS （ 影响因子：3.0； 五年影响因子：3.2 ）

ISSN： 2076-2615

年卷期： 2024 年 14 卷 3 期

页码：

收录情况： SCI

摘要： Through a 30-day experiment, this study investigated the effects of five photoperiods (0L:24D, 6L:18D, 12L:12D, 18L:6D, and 24L:0D) on the survival, enzyme activity, body color, and growth-related gene expression of redclaw crayfish (Cherax quadricarinatus) juveniles. The results showed that C. quadricarinatus juveniles under 18L:6D and 24L:0D photoperiods exhibited the highest survival rate, which was significantly higher than the survival rates of juveniles under the other three photoperiods (p < 0.05). However, the 0L:24D group had the highest final body weight and weight gain rate, significantly surpassing those of the 12L:12D, 18L:6D, and 24L:0D groups (p < 0.05). Regarding enzyme activity and hormone levels, juveniles under the 18L:6D photoperiod exhibited relatively higher activity of superoxide dismutase (SOD), acid phosphatase (ACP), and lysozyme (LZM) enzymes than those under other photoperiods, but their levels of melatonin and cortisol were relatively low. In addition, the 24L:0D group showed the highest malondialdehyde (MDA) content. Analysis of gene expression levels revealed that retinoid X receptor (RXR) and alpha-amylase (alpha-AMY) genes in C. quadricarinatus juveniles exhibited significantly higher expression levels under the 18L:6D photoperiod than those under the other four photoperiods (p < 0.05). With increasing daylight exposure, the body color of C. quadricarinatus changed from pale blue to yellow-brown. In summary, C. quadricarinatus juveniles achieved high survival rates, good growth performance, strong antioxidant stress response, and immune defense capabilities under an 18 h photoperiod. Therefore, in the industrial seedling cultivation of redclaw crayfish, it is recommended to provide 18 h of daily light. Further, the study demonstrated the ability to manipulate the body color of C. quadricarinatus through controlled artificial photoperiods. These findings provide essential technical parameters needed for the industrial cultivation of C. quadricarinatus juveniles.

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