Details

Autor(en) / Beteiligte

• Chang, Fengchih
• Pagano, James J.
• Crimmins, Bernard S.
• Milligan, Michael S.
• Xia, Xiaoyan
• Hopke, Philip K.
• Holsen, Thomas M.

Titel

Temporal trends of polychlorinated biphenyls and organochlorine pesticides in Great Lakes fish, 1999–2009

Ist Teil von

• The Science of the total environment, 2012-11, Vol.439, p.284-290

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2012

Quelle

MEDLINE

Beschreibungen/Notizen

• Temporal trend analysis of the latest Great Lake Fish Monitoring and Surveillance Program (GLFMSP) data showed statistically significant decreases in persistent bioaccumulative and toxic (PBT) contaminant (polychlorinated biphenyls (PCBs), dichloro-diphenyl-trichlorethane and its metabolites (DDTs), dieldrin, cis-chlordane, oxychlordane, cis-nonachlor) concentrations in Lakes Huron, Ontario, and Michigan lake trout over the period of 1999 to 2009. In contrast, for most contaminants, no statistically significant concentration trends were found in top predator fish in Lakes Superior and Erie during the same period. For Lakes Huron, Ontario, and Michigan 5.0±2.6% average annual concentration decreases were found for PCBs, DDTs, dieldrin, and other organochlorine pesticides (OCs) decreased at a faster rate, ranging from 10±4.3% to 20±7.1% per year. For these three lakes, with the exception of PCBs, these current decreases are greater than were shown by an earlier trend analysis that estimated an annual contaminant decrease of about 2–5% for the period of 1980 to 2003. For Lakes Superior and Erie, the finding of no statistically significant trend is in agreement with previously reported results for these lakes. ► PBT concentrations in lake trout decreased significantly in Lakes Huron, Ontario, and Michigan between 1999 and 2009. ► Among the PBTs measured PCBs had the smallest decreasing rates, about one half to one third of those for the other PBTs. ► For Lakes Huron, Ontario, and Michigan the lowest detectable annual concentration changes were 5–10% at 80% power.