An experimental study on the compensatory growth of tongue sole, Cynoglossus semilaevis (Gunther, 1873), following lower temperature manipulation

作者：Fang Jinghui; Tian Xiangli^*; Dong Shuanglin; Fang Jianguang; Zhang Jihong

来源：Aquaculture Research, 2014, 45(9): 1523-1532.

DOI：10.1111/are.12101

• compensatory growth
• temperature
• body composition
• energy budget
• Cynoglossus semilaevis

The compensatory growth, body composition and energy budget of juvenile tongue sole, Cynoglossus semilaevis (Gunther, 1873), subjected to an unfavourable temperature were investigated during 56 days experiment. Fish were divided into four groups including three groups, which were reared at 16 degrees C for 1, 2 and 3 weeks, respectively, then returned to 22 degrees C (recorded as A1, A2 and A3) and a control group (continuously reared at 22 degrees C, C). At the end of the experiment, the body mass was significantly higher in A1 than that in the control (P < 0.05), which indicated over compensatory growth occurred in A1 fish. No significant difference was found in body mass among A2, A3 and C fish (P > 0.05), which indicated complete compensatory growth occurred in A2 and A3 fish. The underlying mechanisms for compensatory growth could be attributed to an improved energetic efficiency resulting from reduced metabolic expenditure and higher feed efficiency during the period of recovery. Furthermore, the fish exposed to lower temperature for 3 weeks showed hyperphagia. The results suggested that the juvenile C. semilaevis exposed to lower temperature for a suitable period (1-3 weeks) used feed more efficiently. This approach may be a useful rearing strategy for indoor culture of C. semilaevis.

• 出版日期2014-8
• 单位中国海洋大学