盐度和体质量对波纹龙虾耗氧率和排氨率的影响

Effects of Salinity and Body Weight on Oxygen Consumption Rate and Ammonia Excretion Rate of Panulirus homarus

利用室内实验生态学方法研究不同盐度和体质量对波纹龙虾的呼吸和排泄的影响。结果表明:不同盐度和体质量对波纹龙虾耗氧率和排氨率有显著影响(p<0.05)。盐度为18～34时,波纹龙虾的耗氧率和排氨率先下降再升高,盐度26和30时较小,耗氧率分别为0.130 5±0.010 5 mg/(g.h)和0.131 4±0.005 2 mg/(g.h),排氨率分别为0.173 3±0.003 9 mg/(g.h)和0.172 4±0.004 4 mg/(g.h)。波纹龙虾耗氧量(MO)和排氨量(MN)与体质量(m)呈正相关,而耗氧率(RO)和排氨率(RN)与体质量呈负相关,其关系式可表示为:MO=1.492 1 m0.419 0和MN=1.129 5 m0.698 8;RO=2.933 3 m-0.734 3和RN=1.129 1 m-0.301 1。

The effects of salinity and body weight on oxygen consumption rate and ammonia excretion rate of Panulirus homarus were studied by the method of indoor experimental ecology.The results showed that,salinity and body weight have significant effects on oxygen consumption rate and ammonia excretion rate（p 0.05）.When the salinity ranged from 18 to 34,both the oxygen consumption rate and the ammonia excretion rate were first decreased and then increased,and the lower oxygen consumption rate was 0.130 5 ± 0.010 5 mg/（g.h）（S = 26） and 0.1314 ± 0.0052 mg/（g.h）（S = 30）,and the lower ammonia excretion rate was 0.173 3 ± 0.003 9 mg/（g.h）（S = 26） and 0.1724 ± 0.004 4 mg/（g.h）（S = 30）,respectively.The oxygen consumption rate（Mo）and the ammonia excretion rate（MN）of Panulirus homarus were correlated positively with body weight（m）,and the relationship between them could be expressed by Mo= 1.492 1 m 0.419 0 and MN= 1.129 5 m 0.698 8,respectively.The oxygen consumption rate（Ro）and ammonia excretion rate（RN）were correlated negatively with body weight,and the relationship could be expressed by Ro= 2.933 3 m-0.734 3and RN= 1.1291 m-0.301 1.