Organochlorine Pesticides (OCPs) in raft mussels coming from Galician rías

ABSTRACTThis survey gives an overview of the range of organochlorine pesticides (OCPs) α and γ-HCH (lindane), HCB, pp´-DDE, pp´-DDD, op´-DDT, pp´-DDT, aldrin, dieldrin, endrin, isodrin and trans-nonachlor in raft mussels cultivated in several polygons of the Galician Rias (Ares-Betanzos, Muros-Noia, Arousa, Pontevedra and Vigo) during the period 1998–2014. A significant number of OCPs were detected, but the levels found were generally low, mainly in the recent samplings (2010–2014). The levels of ∑DDs (sum of DDTs and its metabolites, pp´-DDE and pp´-DDD) ranged between 0.22 ng/g dry weight (dw) in samples from the Ria of Pontevedra and 46.4 ng/g dw in mussels from the Ria of Arousa. Both aldrin and endrin were not detected or were below the analytical limits of detection. With regard to other pesticides, dieldrin is the major compound, followed by γ-HCH, isodrin, α-HCH and transnonachlor. Significant ANOVA regressions indicated variations in levels of some OCPs with the biological parameters (lipid, cond...