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dc.contributor.authorPatra, P.
dc.contributor.authorMohandass, C.
dc.contributor.authorChakraborty, P.
dc.contributor.authorSeleyi, S.C.
dc.date.accessioned2021-06-16
dc.date.accessioned2021-06-22T10:09:02Z
dc.date.available2021-04-01
dc.date.available2021-06-22T10:09:02Z
dc.date.issued2021
dc.identifier.citationChemosphere, vol.278; 2021; Article no: 130338
dc.identifier.issn0045-6535
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S0045653521008080
dc.identifier.urihttps://doi.org/10.1016/j.chemosphere.2021.130338
dc.identifier.urihttps://drs-beta.nio.org/drs/handle/2264/8643
dc.descriptionIF2019 - 5.778
dc.description.abstractImpact of varying concentrations and counts of toxic metals and indigenous bacteria on antioxidative defense system in edible oyster, Saccostrea cucullata, collected from four tropical estuarine systems of Goa (west coast of India), are presented in this study. Relatively high abundance of bacteria was estimated from the oysters especially during monsoon season (June-September). Density of total and fecal coliforms were about 24 times higher in the organism than the surrounding water (average TC: 4360 and FC: 3475 MPN 100 ml?1). Sedimentary Cd, Pb, and Hg concentrations varied from 0.12 to 0.48, 19.28-102.48, and 0.03-0.13 mg kg?1 (dry wt.) while, bioaccumulation of Cd, Pb, and Hg in the oysters ranged from 5.17 to 10.6, 0.18-7.99, and 0.06-0.22 mg kg?1 (dry wt.) respectively. Higher degree of pollution and moderate ecotoxicological risks with increasing toxicity (36-37%) was observed in two of the tropical estuaries. Biomarker response in the oysters was somewhat inconsistent with pollution load in the estuarine systems. Elevated environmental stress was observed during pre-monsoon (March-May) followed by the monsoon period. Sedimentary metals were identified as predominant inducers of antioxidative defence system in oysters from the study areas. This study suggests that, biomarker can be useful in assessing the combined effects of metal and bacterial contaminations on native oysters and in evaluating environmental quality in tropical estuarine systems
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleBiochemical responses of oysters in evaluating environmental quality of tropical Indian estuarine systems
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Mumbai, Maharastra, India


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