Oxygen consumption and ammonia-N excretion of Meretrix meretrix in different temperature and salinity  

作　　者：唐保军 刘保忠 杨红生 相建海 

机构地区：[1]Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071, China Graduate School of the Chinese Academy of Sciences, Beijing 100039, China [2]Institute of Oceanology, Chinese Academy of Sciences,Qingdao 266071, China

出　　处：《Chinese Journal of Oceanology and Limnology》2005年第4期469-474,共6页中国海洋湖沼学报（英文版）

基　　金：This work is supported by National High-Tech R & D Program of China,(863 Program) (2002AA603014)

摘　　要：Effects of temperatures and salinities on oxygen consumption and ammonia-N excretion rate of clam Meretrix meretrix were studied in laboratory from Oct. 2003 to Jan. 2004. Two schemes were designed in incremented temperature at 10, 15, 20, 25℃ at 31.5 salinity and in incremented salinity at16.0, 21.0, 26.0, 31.5, 36.0, and 41.0 at 20℃, all for 8-10 days. From 10 to 25℃, both respiration and excretion rate were increased. One-way ANOVA analysis demonstrated significant difference （P〈0.01） in physiological parameters in this temperature range except between 15 and 20℃. The highest Q10 thermal coefficient value （12.27） was acquired between 10 and 15℃, and about 1 between 15 and 20℃, indicating M. meretrix could well acclimate to temperature changes in this range. Salinity also had significant effects on respiration and excretion rate （P〈0.05）. The highest values of respiration and excretion rate of M. meretrix were recorded at 16.0 salinity （20℃）. These two physiological parameters decreased as salinity increased until reached the minimum Q10 value at 31.5 （20℃）, then again, these parameters increased with increasing salinity from 31.5 to 41.0. M. meretrix can catabolize body protein to cope with osmotic pressure stress when environmental salinity is away from its optimal range. No significant difference was observed between 26.0 and 36.0 in salinity （P〉0.05）, suggesting that a best metabolic salinity range for this species is between 26.0 and 36.0.Effects of temperatures and salinities on oxygen consumption and ammonia-N excretion rate of clam Meretrix meretrix were studied in laboratory from Oct. 2003 to Jan. 2004. Two schemes were designed in incremented temperature at 10, 15, 20, 25°C at 31.5 salinity and in incremented salinity at16.0, 21.0, 26.0, 31.5, 36.0, and 41.0 at 20°C, all for 8-10 days. From 10 to 25°C, both respiration and excretion rate were increased. One-way ANOVA analysis demonstrated significant difference (P<0.01) in physiological parameters in this temperature range except between 15 and 20°C. The highest Q10 thermal coefficient value (12.27) was acquired between 10 and 15°C, and about 1 between 15 and 20°C, indicating M. meretrix could well acclimate to tem- perature changes in this range. Salinity also had significant effects on respiration and excretion rate (P<0.05). The highest values of respiration and excretion rate of M. meretrix were recorded at 16.0 salinity (20°C). These two physiological parameters decreased as salinity increased until reached the minimum Q10 value at 31.5 (20°C), then again, these parameters increased with increasing salinity from 31.5 to 41.0. M. meretrix can catabolize body protein to cope with osmotic pressure stress when environmental salinity is away from its optimal range. No significant difference was observed between 26.0 and 36.0 in salinity (P>0.05), suggesting that a best meta- bolic salinity range for this species is between 26.0 and 36.0.

关 键 词：Meretrix meretrix TEMPERATURE SALINITY oxygen consumption rate ammonia-N excretion rate 

分 类 号：P734.4[天文地球—海洋化学]