Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 4417
Title: In situ biomonitoring of caged, juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Lower Duwamish Waterway
Author: Matthew Kelley, Annika Gillespie, Guo-Dong Zhou, Shu Zhang, J. P. Meador, Bruce Duncan, Kirby Donnelly, Thomas McDonald
Publication Year: 2011
Journal: Marine Pollution Bulletin
Volume: 62
Pages: 2520-2532
DOI: 10.1016/j.marpolbul.2011.07.026
Keywords: chinook,toxicants,sediment,Duwamish River,biomarkers,toxicity,

Contaminated sediments may have wide-ranging impacts on human and ecological health. A series of
in situ caged exposure studies using juvenile Chinook salmon was conducted in the Lower Duwamish
Waterway (LDW). Chemical analysis of sediment, water, and fish tissue were completed. Additionally,
in 2004, DNA adducts in hepatic and gill tissues were measured. Gills contained significantly higher
DNA adducts at stations B2 and B4, prompting further analysis of gills in 2006 and 2007. Fluorescent aromatic compounds (FACs) in bile, and CYP1A1 in hepatic tissue were also measured during 2006 and 2007, respectively. FACs in field-caged fish were comparable or significantly higher than wild-caught fish LDW fish and significantly higher than lab fish after only 8–10 days, demonstrating the equivalency of exposure to that of migrating salmon. Furthermore, selected biomarkers appear to be capable of detecting
spikes in contamination between sampling years, emphasizing the need for multiple year data collection.

Theme: Sustaining Marine Ecosystem and Human Health
Foci: Develop methods, identify data, and generate tools to describe communities and their connection to ocean environments to improve early warnings and predict impacts of hazardous events.