【摘要】 采用代谢瓶人工培养方法,初步研究了未受污染情况下河蚬的呼吸和排泄过程中的重要指标耗氧率和排氨率。与受100、200、400!g·L-1的重金属镉和铜的单独和联合污染情况下河蚬耗氧率和排氨率进行对照,结果显示随着3种不同处理方式重金属浓度的增大,河蚬的耗氧率、排氨率均有明显的下降。3种处理浓度中,除100!g·L-1处理组外,200、400!g·L-1的不同重金属处理方式均对河蚬的耗氧率、排氨率产生抑制。结果显示河蚬的呼吸和排泄过程中耗氧率和排氨率的变化可以作为河蚬重金属镉、铜污染的指示指标。更多还原

【Abstract】 Freshwater filtering organisms,Asian clam(Corbicula fluminea)were collected from Zengjiang River,a upper branch of Pearl River.The healthy clams were used in the experiment,with shell length 24.0±2 mm and body weight 3.0~5.5 g.They were temporarily fed with chlamydomoas reinbardtii and chlorella vulgans in the aquariums for a week and ceased feeding for two days before the heavy metal exposal experiments.Basic oxygen consumption rate(OCR)and the ammonia excretory rate(AER)of the clams,which are important indexes of respiration and excretion metabolism of the clams,were determined.Before and after exposed to three doses(100 g·L-1,200 g·L-1and 400 g·L-1)of Cd,Cu and Cd+Cu,OCR and AER of the clams were compared.Under 100 g·L-1,200 g·L-1 and 400 g·L-1 of Cd,Cu and Cd+Cu,the OCR and AER of the clams decreased with the increasing of the concentrations of the heavy metals.Under 200 g·L-1 and 400 g·L-1 of Cd,Cu and Cd+Cu,the OCR and AER of the clams were restrained.These results indicated that OCR and AER could be used as the indicators of Cd and Cu pollution when using Asian clams as heavy metal monitoring organism.更多还原