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Oxygen uptake and filtration rate as animal health biomarker in Lamellidens marginalis (Lamarck)

Oxygen uptake and filtration rate as animal health biomarker in Lamellidens marginalis (Lamarck)

Indian Journal of Experimental Biology 41(11): 1306-1310

The freshwater bivalve, L. marginalis was experimentally exposed to 10 and 30 ppm concentrations of CdCl2 to examine filtration rate, oxygen uptake and glycogen level of liver and gills for health assessment for their reuse in the reclamation of cadmium intoxicated environments. In situ experiment was also performed for better appraisal of the filtration rate in the lake. Oxygen uptake in the treated group exceeded that of control by 15-22% during the early 24 hr after cadmium exposure, but followed an essential decline (23-30%) thereafter. The reduction of filtration rate ranged from 12-62% in laboratory to 83-85% in field trials. At the tissue level, glycogen content was reduced by 61-72% in liver and 52-63% in gill. In both tissues, glycogen content was inversely proportional to the cadmium contents of the animal. Critical appraisal of data suggests that the threshold values of cadmium in gill and liver were 50-80 microg/g dw for oxygen uptake and 50-60 microg/g for filtration rate because of marked reduction of these parameters beyond the values of cadmium. It is concluded that filtration rate, oxygen uptake of the freshwater bivalve, L. marginalis can be used as biomarker for animal health assessment and for possible reuse of the stock animals.

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Accession: 049839023

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PMID: 15332502

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