The Roles of Diet and Habitat Use in Pesticide Bioaccumulation by Juvenile Chinook Salmon: Insights from Stable Isotopes and Fatty Acid Biomarkers.

Autor: Anzalone SE; Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL, 62901, USA., Fuller NW; Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL, 62901, USA., Hartz KEH; Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL, 62901, USA., Whitledge GW; Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL, 62901, USA., Magnuson JT; U.S. Geological Survey, Columbia Environmental Research Center, Columbia, MO, 65201, USA.; Department of Environmental Sciences, University of California Riverside, Riverside, CA, 92521, USA., Schlenk D; Department of Environmental Sciences, University of California Riverside, Riverside, CA, 92521, USA., Acuña S; Metropolitan Water District of Southern California, Sacramento, CA, 95814, USA., Whiles MR; Department of Soil and Water Sciences, University of Florida, Gainesville, FL, 32611, USA., Lydy MJ; Center for Fisheries, Aquaculture, and Aquatic Sciences, Southern Illinois University, Carbondale, IL, 62901, USA. mlydy@siu.edu.
Jazyk: angličtina
Zdroj: Archives of environmental contamination and toxicology [Arch Environ Contam Toxicol] 2024 Apr; Vol. 86 (3), pp. 234-248. Date of Electronic Publication: 2024 Mar 31.
DOI: 10.1007/s00244-024-01060-2
Abstrakt: Stable isotopes (SI) and fatty acid (FA) biomarkers can provide insights regarding trophic pathways and habitats associated with contaminant bioaccumulation. We assessed relationships between SI and FA biomarkers and published data on concentrations of two pesticides [dichlorodiphenyltrichloroethane and degradation products (DDX) and bifenthrin] in juvenile Chinook Salmon (Oncorhynchus tshawytscha) from the Sacramento River and Yolo Bypass floodplain in Northern California near Sacramento. We also conducted SI and FA analyses of zooplankton and macroinvertebrates to determine whether particular trophic pathways and habitats were associated with elevated pesticide concentrations in fish. Relationships between DDX and both sulfur (δ 34 S) and carbon (δ 13 C) SI ratios in salmon indicated that diet is a major exposure route for DDX, particularly for individuals with a benthic detrital energy base. Greater use of a benthic detrital energy base likely accounted for the higher frequency of salmon with DDX concentrations > 60 ng/g dw in the Yolo Bypass compared to the Sacramento River. Chironomid larvae and zooplankton were implicated as prey items likely responsible for trophic transfer of DDX to salmon. Sulfur SI ratios enabled identification of hatchery-origin fish that had likely spent insufficient time in the wild to substantially bioaccumulate DDX. Bifenthrin concentration was unrelated to SI or FA biomarkers in salmon, potentially due to aqueous uptake, biotransformation and elimination of the pesticide, or indistinct biomarker compositions among invertebrates with low and high bifenthrin concentrations. One FA [docosahexaenoic acid (DHA)] and DDX were negatively correlated in salmon, potentially due to a greater uptake of DDX from invertebrates with low DHA or effects of DDX on FA metabolism. Trophic biomarkers may be useful indicators of DDX accumulation and effects in juvenile Chinook Salmon in the Sacramento River Delta.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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