Seasonal and pollution-induced variations in biomarkers of transplanted mussels within the Beagle Channel

► GST and SOD activities have been studied for the first time in mussels from Ushuaia Bay. ► LPO levels were higher in areas receiving urban wastewaters. ► Biomarkers and heavy metals were seasonally affected, probably associated to reproductive cycle. ► Superoxide dismutase activity was induced by heavy metals. ► Catalase activity would be the best biomarker considering that it was seasonal independent.