Abstract

Since a general pathway of toxicity induced by pollutants is the enhancement of reactive oxygen species, biochemical responses associated with variations in the antioxidant cellular system have been often proposed as biomarkers of pollutant-mediated toxicity associated with oxidative stress. Antarctic organisms live in an extreme environment characterized by low water temperature, high level of dissolved oxygen, presence of ice and strong seasonal changes in light intensity and availability of food, conditions which could influence both the formation of reactive oxygen species and the mechanisms for their removal. In this respect and considering the utility of this as a key species for monitoring marine Antarctic environment it was of interest to investigate the antioxidant defense system of the scallop Adamussium colbecki.

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