Organochlorine pesticide residues in muscle tissue of rainbow trout,Oncorhynchus mykisstaken from four fish farms in León, Spain

Abstract

Levels of nine organochlorine pesticides (lindane, hep‐tachlor epoxide, aldrin, dieldrin, endrin, o,p'‐TDE p,p’‐TDE, p,p'‐DDE andp,p'‐DDT) were determined in muscle samples of rainbow trout Onchorhynchus mykiss, collected from four fish farms in the province of León, in the north‐west of Spain (Europe). The highest incidence percentage was for lindane (67.5%) and heptachlor epoxide (55.0%). Organochlorine residue levels detected contributed slightly to acceptable daily intakes (ADIs) established by the Food and Agriculture Organization of the United Nations and the World Health Organization (lindane 0.22–2.3%; SDDT 0.05–0.46%; heptachlor epoxide 10.0–71.4% and Sdieldrin 16.7–33.3% assuming 300 g of trout muscle as a mean daily intake). The highest concentration found was for heptachlor epoxide (0.043 μg/g).