pH值对厚颌鲂幼鱼的耗氧率及窒息点的影响  

Effects of pH on the Oxygen Consumption Rate and Ammonia Excretion Rate in Juvenile Megalobrama pellegrini

作　　者：李代金[1] 黄辉[1] 谭德清[2] 

机构地区：[1]西南大学荣昌校区水产系,重庆荣昌402460 [2]中国科学院水生生物研究所,武汉430072

出　　处：《四川动物》2011年第2期178-181,共4页Sichuan Journal of Zoology

基　　金：中国长江三峡工程开发总公司生态与环境保护科研项目(0714091);国务院三峡工程建设委员会办公室生态环境项目(SX2007-019);国家自然科学基金资助项目(50679095)

摘　　要：在密封式流水呼吸室内,对厚颌鲂Megalobrama pellegrini幼鱼在pH值分别为5.5、6.0、6.5、7.0、7.5、8.0和8.5试验用水条件下的耗氧率进行了测定。结果显示:厚颌鲂幼鱼耗氧率存在明显的昼夜变化,白天高于晚上,下午高于上午,夜间变化不大。不同pH值的平均耗氧率为0.7135mg/g.h,平均耗氧率最高是在pH7.5时,为0.8665mg/g.h,平均耗氧率最低是在pH5.5时,为0.5397mg/g.h。在密封式呼吸室内测定pH值在5.5、6.0、6.5、7.0、7.5、8.0和8.5试验用水条件下的厚颌鲂幼鱼的窒息点,分别为1.3920、1.3067、1.1547、1.0683、1.0933、1.1733和1.2331mg/L,平均窒息点为1.2008mg/L。The effect of different pH（5.5,6.0,6.5,7.0,7.5,8.0,and 8.5）on oxygen consumption rate in juvenile Megalobrama pellegrini was measured in a sealed respiratory chamber.The results showed that the oxygen consumption rate（OCR）changed significantly during 24 hours,OCR during the daytime was higher than that at night,and higher in the afternoon than in the morning,but there was no significant difference during night time.The average OCR at different pH was 0.7135 mg/（g·h）.The maximum average OCR was 0.8665 mg/（g·h）at pH 7.5,while the minimum average OCR was 0.5397 mg/（g·h）at pH5.5.The asphyxial point（AP）of juvenile Megalobrama pellegrini was 1.3920,1.3067,1.1547,1.0683,1.0933,1.1733,and 1.2331 mg/L at pH 5.5,6.0,6.5,7.0,7.5,8.0,and 8.5,respectively.The average AP was 1.2008 mg/L.

关 键 词：PH 耗氧率 窒息点 厚颌鲂幼鱼 

分 类 号：S917.4[农业科学—水产科学]