Journal of Tianjin Agricultural University ›› 2014, Vol. 21 ›› Issue (1): 23-27.

• Researches and Scientific Notes • Previous Articles     Next Articles

Impacts of Temperature on Respiratory Metabolism of Juvenile Plectropomus leopardus Lacépède

YAO Xue-liang1, CAI Yan1, ZHANG Zhen-kui1, ZHANG Qin1, SUN Zhi-jing2,Corresponding Author, XIA Su-dong2, YOU Hong-zheng1, SONG Yun-peng1   

  1. 1. Tianjin Aquatic Product Technology Promotion Department, Tianjin 300221, China;
    2. Tianjin Fisheries Research Institute, Tianjin 300221, China
  • Received:2013-08-21 Published:2019-10-21

Abstract: The metabolism of juvenile Plectropomus leopardus Lacépède were measured at five different water temperatures (15,20,25,30,35 ℃), the energy contribution of lipid, protein and carbohydrate to the fish was also analyzed. The results show that oxygen consumption rates, ammonia excretion rates, carbon dioxide excretion rates increased with the water temperature rising from 15 ℃ to 30 ℃, and there were significant differences at different water temperature (P<0.05). Respiratory quotient, ammonia quotient, metabolic rates and excretion rates increased with the rise of temperature, and all decreased at 35 ℃. The results of oxygen-nitrogen ratio indicate that the juvenile Plectropomus leopardus Lacépède utilized protein and fat as the major energy source. With temperature increasing, the proportion of fat and carbohydrate for the energy increased gradually. The change law of Q10 suggests that temperature between 15 ℃ and 30 ℃ was the optimum temperature for growth of Plectropomus leopardus Lacépède, and temperature influenced metabolic rates of juvenile Plectropomus leopardus Lacépède significantly.

Key words: Plectropomus leopardus Lacépède, temperature, oxygen consumption rate, ammonia excretion rate, carbon dioxide excretion rate, energy contribution of protein

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