Compensatory Growth of the Juvenile Brown Flounder Paralichthysolivaceus Following Being Kept at High Temperature for a Single Phase of Different Length
Liu Xujia1,3, Peng Yinhui1, Wei Liuzhi3, Zhang Xiumei3
Affiliation
1Guangxi Key Laboratoryof Marine Biotechnology, Guangxi Institute of Oceanology, Beihai 536000, China
2Ocean college, Qinzhou University, Qinzhou 535011, China
3Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
Corresponding Author
Huang Guoqiang,Guangxi Key Laboratoryof Marine Biotechnology, Guangxi Institute of Oceanology, Beihai 536000, China, E-mail: hugh7531@163.com
Citation
Guoqiang, H. Compensatory Growth of the Juvenile Brown Flounder Paralichthysolivaceus Following Being Kept at High Temperature for a Single Phase of Different Length. (2018) J Marine Biol Aquacult 4(1): 21- 26.
Copy rights
© 2018 Guoqiang, H. This is an Open access article distributed under the terms of Creative Commons Attribution 4.0 International License.
Keywords
Abstract
The compensatory growth of juvenile brown flounder (Paralichthysolivaceus) with an average initial weight of 0.8g exposed to high temperature for a single phase of different length was determined. Nine hundred juvenile flounders were randomly distributed in 15 re-circulating glass aquaria. The fish were exposed to high temperature 26°C for 0 (control group), 10, 20, 30 and 40 days, followed by optimal temperature 20°C for 70, 60, 50 and 40 days, respectively. The weights of fish exposed for 10 and 20 days to 26 °C were recovered to the levels of control fish, while those of the other two treatments for 30 and 40 days to 26 °C were still significantly lower than the control. During the high temperature stress for different length, weight, specific growth rate (SGR) and feed conversion efficiency (FCE) of fish were significantly lower, while the feeding rate (FR) were higher (P < 0.05) than those of fish in the control treatment (P < 0.05). There were no significant differences in feeding rate between the high temperature for 10 and 20 days and control treatment during the recovery period. The feed conversion of high temperature exposed fish improved in recovery periods but not exceed the control treatment. Analysis of the data indicated that the compensatory growth in the recovery period depended on greatly improved feed conversion efficiency and slightly higher feeding rate. Results of this study support a reference function and have practical significance for juvenile P.olivaceus culture and enhancement
