title: Temporal trends of polychlorinated biphenyls and organochlorine pesticides in Great Lakes fish, 1999-2009.
abstract: 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.
authors.affiliation: Department of Civil & Environmental Engineering, Clarkson University, 8 Clarkson Ave., Potsdam, NY 13699, USA.
authors.forename: Fengchih
authors.initials: F
authors.lastname: Chang
authors.forename: James J
authors.initials: JJ
authors.lastname: Pagano
authors.forename: Bernard S
authors.initials: BS
authors.lastname: Crimmins
authors.forename: Michael S
authors.initials: MS
authors.lastname: Milligan
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Xia
authors.forename: Philip K
authors.initials: PK
authors.lastname: Hopke
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Holsen
mesh_terms: D000818:Animals; D003247:Conservation of Natural Resources / Q000706:statistics & numerical data / Q000639:trends*; D004784:Environmental Monitoring / Q000379:methods / Q000706:statistics & numerical data; D062305:Geographic Mapping; D006114:Great Lakes Region; D007700:Kinetics; D060106:Lakes / Q000032:analysis*; D016014:Linear Models; D017686:Oncorhynchus mykiss / Q000254:growth & development / Q000378:metabolism; D010575:Pesticides / Q000032:analysis* / Q000493:pharmacokinetics; D011078:Polychlorinated Biphenyls / Q000032:analysis* / Q000493:pharmacokinetics; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000493:pharmacokinetics
chemical_list: D010575:Pesticides; D014874:Water Pollutants, Chemical; D011078:Polychlorinated Biphenyls