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In situ biomonitoring of caged, juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Lower Duwamish Waterway |
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| Authors: | Kelley Matthew A Gillespie Annika Zhou Guo-Dong Zhang Shu Meador James P Duncan Bruce Donnelly Kirby C McDonald Thomas J |
| Institution: | a Department of Environmental and Occupational Health, School of Rural Public Health, Texas A&M Health Science Center, 101 Adriance Road, College Station, TX 77843, United States b Institute of Biosciences and Technology, Texas A&M Health Science Center, 2121 W. Holcombe Blvd, Houston, TX 77030, United States c Ecotoxicology and Environmental Fish Health Program, Environmental Conservation Division, Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA, 2725 Montlake Boulevard East, Seattle, WA 98112, United States d US Environmental Protection Agency, Region 10, 1200 Sixth Avenue, Seattle, WA 98101, United States |
| Abstract: | 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. |
| Keywords: | Sediment Lower Duwamish Waterway Chinook salmon Caged exposure |
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