中国水产科学2017，Vol.24Issue(2)：295-305,11.DOI:10.3724/SP.J.1118.2017.16179
温度对不同规格珍珠龙胆石斑鱼(棕点石斑鱼♀×鞍带石斑鱼♂)呼吸和排泄的影响
Effects of temperature on respiration and excretion by different sizes of hybrid grouper (Epinephelus fuscoguttatus♀×Epinephelus lanceo-latus♂)
摘要
Abstract
The effects of five water temperatures (15.8℃, 21.0℃, 26.6℃, 30.9℃, 36.5℃) on respiration and ex-cretion in three sizes (27.4 g±0.8 g, 276.5 g±17.3 g, and 575.4 g±18.8 g) of hybrid grouper (Epinephelus fus-coguttatus♀×Epinephelus lanceolatus♂) were investigated using ecological methods in the laboratory. The ex-perimental results showed that both water temperature and body weight had significant effects on oxygen con-sumption and ammonia excretion rates of hybrid grouper (P<0.05). Under controlled laboratory conditions, oxy-gen consumption and ammonia excretion rates increased initially in all sizes of hybrid grouper, then decreased and increased again as water temperature was increased. These rates were highest at 26.6℃, such as (1.510±0.124) mg/(g·h), (0.306±0.007) mg/(g·h), and (0.161±0.010) mg/(g·h) and (47.739±21.048)μg/(g·h), (13.956±1.783)μg/(g·h), and (6.811± 1.882)μg/(g·h), respectively. The regression equations between oxygen consumption rate and ammonia excretion rate and water temperature were quadratic (R2=1.000). Oxygen consumption and ammonia excretion rates within the temperature range of 15.8–6.5℃ decreased roughly with an increase in body weight at the same water temperature, and the regression equations for oxygen consumption rate mg/(g·h) and ammonia excretion rateμg/(g·h)and body weight were quadratic (R2=1.000). TheQ10 values for the oxygen consumption and ammonia excretion rates in all sizes of hybrid grouper peaked at water temperatures of 21.0–26.6℃ and were at their mini-mum at 26.6–30.9℃. The mean O/N ratios of the small- and medium- and large-sized hybrid grouper were 21.535, 15.713, and 12.097 to 113.541, 32.193, and 27.094, respectively, indicating that protein, fat, and carbohydrate wereconsumed by the small-sized hybrid grouper for energy, and that protein and fat were consumed by me-dium-and large-sized hybrid grouper.关键词
珍珠龙胆石斑鱼/水温/规格/耗氧率/排氨率/温度系数(Q10)/O/N比值Key words
Epinephelus fuscoguttatus♀×Epinephelus lanceolatus♂/water temperature/body weight/oxygen consumption rate/ammonia excretion rate/Q10/O/N ratio分类
农业科技引用本文复制引用
仇登高,黄种持,郑乐云,吴水清,刘银华,邱峰岩,郑君飘,陈新明..温度对不同规格珍珠龙胆石斑鱼(棕点石斑鱼♀×鞍带石斑鱼♂)呼吸和排泄的影响[J].中国水产科学,2017,24(2):295-305,11.基金项目
国家海洋经济创新发展区域示范项目(12CY001SF01) （12CY001SF01）
福建省海洋经济创新发展区域示范项目(2014FJPT01) （2014FJPT01）
厦门南方海洋研究中心项目(14PZY017NF17,14GZP75NE39) （14PZY017NF17,14GZP75NE39）
福建省海洋与渔业结构调整专项 （）
福建省省属公益类科研院所基本科研专项(2016R1003-8). （2016R1003-8）
