Organochlorine pesticide residues in muscle tissue of rainbow trout, oncorhynchus mykiss, taken 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 and p,p'-DDT ) were determined in muse/e 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 ( AD!s) established by the Food and Agricul­ ture Organization of the United Nations and the World Health Organization ( lindane 0.22-2.3%; I:DDT 0.05-0.46% ; heptachlor epoxide 10.0-71.4% and I:dieldrin 16.7-33.3% assuming 300 g of trout muse/e as a mean daily intake). The highest concentration found was far heptachlor epoxide ( 0.043 µg/g).