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ORGANOCHLORINE CONTAMINANTS IN SEA TURTLES FROM THE EASTERN PACIFIC
Citation:
Gardner, S. C., M. D. Pier, R Wesselman, AND J. A. Juarez. ORGANOCHLORINE CONTAMINANTS IN SEA TURTLES FROM THE EASTERN PACIFIC. MARINE POLLUTION BULLETIN 46(9):1082-1089, (2003).
Impact/Purpose:
Meaningful interpretation/assessment of data is dependent upon reliable data. The objective of ECCB is to provide highly accurate and precise analytical results for the chemicals of interest in various EERD and NERL tasks. ECCB intends to perform both method development and routine analyses in a timely and cost effective manner.
Description:
We measured organochlorine residues in three species of sea turtles from the Baja California peninsula, Mexico. Seventeen of 21 organochlorine pesticides analyzed were detected, with heptachlor epoxide and y-hexachlorocyclohexane the most prevalent in 14 (40%) and 11 (31%) of the 35 tissue samples, respectively. PCBs were detected in all but one of the 9 turtles studied, with congener 18 of the most commonly detected in 8 (23%) of the samples. The dioxin-like congeners 118 and 180 were detected in 4 (11%) and 3 (9%) of the samples, respectively. Percent contribution of congeners was negatively correlated to their octanol-water partition coefficients, with kidney and muscle containing more lower-chlorinated congeners than liver or adipose samples. Levels of organochlorines detected in the present study were low, potentially attributable to the feeding habits of the predominant species collected in this study (herbivorous) and/or the samples obtained in an unindustrialized region.