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Effects of temperature on the survival, feeding, and growth of pearl gentian grouper (female Epinephelus fuscoguttatus × male Epinephelus lanceolatus)

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  • Aquaculture
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Abstract

Pearl gentian grouper (Epinephelus fuscoguttatus ♀ × Epinephelus lanceolatus ♂) is an important commercial and economic fish from the southeast coast of China. Yet, the optimal water temperature for the aquaculture of pearl gentian grouper has not been reported in China. The present study compared the survival, feeding, and growth parameters of pearl gentian groupers (121.62 ± 10.08 g) cultured at six different water temperatures (9, 14, 19, 24, 29, and 34 °C) for 30 days. The results showed that the survival rate of pearl gentian groupers increased with increasing water temperature. When the temperature was equal to or lower than 14 °C, all the fishes stopped eating and all died within 18 days. At 29 and 34 °C, the survival rate was 100%. The feeding rate and the daily weight gain increased with elevated water temperature, with the maximal value observed at 34 °C. At 29 °C, the food conversion ratio was the lowest, in comparison to treatments at other temperatures. Based on the regression curve between specific growth rate and water temperature, the optimal temperature for the growth of pearl gentian grouper was estimated to be 32.4 °C. Overall, the present results contribute basic information for the aquaculture of pearl gentian grouper in China.

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Acknowledgements

We thank the Shenzhen Nobel Science and Technology Service for comments and correcting the English. This work was supported by the High Value Development of Important Marine Biological Resources of Fujian-Taiwan Public Technology Service Platform (2014FJPT01), the Important Marine Economy Biological Gene Bank and Resource High-efficiency Development of Fujian Public Technology Service Platform (14PZY017NF17), Special Funds for Research on Marine Public Welfare Industry (201205019-3), the Marine Ecological Environment Intelligent Observation and Surveillance Equipment Development of Public Service Platform (16PFW034SF02), and the Marine Engineering Equipment and Bioindustry Development Innovation Center of Fujian-Taiwan (FuZhou) Blue Economy Industrial Park (FZHJ05).

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Authors and Affiliations

  1. Key Laboratory of Cultivation and High-Value Utilization of Marine Organisms in Fujian Province, Fisheries Research Institute of Fujian, Xiamen, 361013, China

    Zhe Zhang, Zhangwu Yang, Guofu Zheng & Qi Lin

  2. Heyuan Entry-Exit Inspection and Quarantine Bureau, Heyuan, 517000, China

    Ning Ding

  3. Children’s Hospital of Fudan University Xiamen Branch, Xiamen, 361006, China

    Weiwei Xiong

  4. The Shenzhen GenProMetab Biotechnology Company Limited, Shenzhen, 518000, China

    Gen Zhang

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  1. Zhe Zhang
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  2. Zhangwu Yang
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  3. Ning Ding
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  4. Weiwei Xiong
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  5. Guofu Zheng
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  6. Qi Lin
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  7. Gen Zhang
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Correspondence to Zhe Zhang or Gen Zhang.

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Zhang, Z., Yang, Z., Ding, N. et al. Effects of temperature on the survival, feeding, and growth of pearl gentian grouper (female Epinephelus fuscoguttatus × male Epinephelus lanceolatus). Fish Sci 84, 399–404 (2018). https://doi.org/10.1007/s12562-017-1163-4

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  • DOI: https://doi.org/10.1007/s12562-017-1163-4

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