Organohalogenated contaminants in multiple life stages of the Pacific lamprey (Entosphenus tridentatus), Oregon, USA

Environmental Pollution, Journal Year: 2023, Volume and Issue: 335, P. 122363 - 122363

Published: Aug. 10, 2023

Pacific lamprey (Entosphenus tridentatus) are ecologically and culturally important anadromous animals native to the West Coast of United States. populations in decline, contaminants may be a contributing factor. Between 2017 2021, three life stages collocated sediment samples were collected Oregon (larval lamprey, sediment, returning adult lamprey) off coast Washington (ocean juvenile lamprey). Tissue analyzed for 56 organohalogenated compounds that included legacy pesticides, current use polybrominated diphenyl ether congeners, polychlorinated biphenyl congeners. Organohalogenated detected all stages. The larval generally dissimilar, indicate potential point sources along rivers. Ocean-caught had significantly higher lipid contents than but content concentrations select not strongly correlated. Concentrations both ocean either different or lamprey. some lamprey-which consumed by Indigenous peoples-exceeded state national human health consumption thresholds. Collaboration among Tribes public-sector agencies helped make this study successful.

Language: Английский

Assessment of persistent chemicals of concern in white sturgeon (Acipenser transmontanus) in the Hanford Reach of the Columbia River, southeastern Washington, 2009

Scientific investigations report, Journal Year: 2022, Volume and Issue: unknown

Published: Jan. 1, 2022

First posted June 28, 2022 For additional information, contact: Director, Oregon Water Science CenterU.S. Geological Survey2130 SW 5th AvenuePortland, 97201 White sturgeon (Acipenser transmontanus) are long-lived, late-maturing, benthic-feeding fish that ideal candidates for assessing the bioaccumulation of persistent chemicals. In this study, composite tissue samples brain, liver, gonad, and fillet were collected from white in 2009 five sites Hanford Reach Columbia River near Hanford, Washington. The at each site analyzed concentrations individual chemicals as well total four chemical classes: (1) organochlorine (OC) pesticides, (2) industrial or personal care products, (3) polybrominated diphenyl ether (PBDE) congeners, (4) polychlorinated biphenyl (PCB) congeners. results showed all classes present fish, OC pesticides degradation products (such oxychlordane, fipronil sulfide, dichlorodiphenyltrichloroethane (DDT) degradates, PBDE PCB congeners) often tissues sites. Gonad generally had highest concentration class, followed by brains, livers, fillets. several exceeded many human health benchmarks two different populations (general/recreational consumers subsistence/Tribal consumers), was especially true DDT These suggest continued monitoring resident Reach, assessments impacts on those warranted.

Language: Английский