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Assessment Of Selenium And Atrazine Exposure And Effects To Wildlife At The North Platte National Wildlife Refuge, Scottsbluff, Nebraska, Matthew S. Schwarz, Christina D. Lydick
Assessment Of Selenium And Atrazine Exposure And Effects To Wildlife At The North Platte National Wildlife Refuge, Scottsbluff, Nebraska, Matthew S. Schwarz, Christina D. Lydick
United States Fish and Wildlife: Staff Publications
This study evaluated selenium and atrazine exposure and effects to fish and wildlife at North Platte National Wildlife Refuge (Refuge) in Scotts Bluff County, Nebraska. Atrazine was detected in 2 of 54 water samples and at low concentrations that are not of concern. However, concentrations of selenium and strontium exceeded toxicity guidelines in water, sediment, invertebrates, whole-body fish and wood duck eggs. Concentrations of selenium in water at Refuge sites frequently exceeded a 2 μg/L total recoverable threshold for selenium bioaccumulation and were greatest at Stateline Island (9.7 μg/L) and Little Lake Alice (24 μg/L). In sediments, strontium concentrations were …
A Health Risk Evaluation For Pallid Sturgeon (Scaphirhynchus Albus) In The Lower Platte River Using Shovelnose Sturgeon (Scaphirhynchus Platorynchus) As A Surrogate, Matthew S. Schwarz, Christina D. Lydick, Donald E. Tillit, Diana M. Papoulias, Timothy S. Gross
A Health Risk Evaluation For Pallid Sturgeon (Scaphirhynchus Albus) In The Lower Platte River Using Shovelnose Sturgeon (Scaphirhynchus Platorynchus) As A Surrogate, Matthew S. Schwarz, Christina D. Lydick, Donald E. Tillit, Diana M. Papoulias, Timothy S. Gross
United States Fish and Wildlife: Staff Publications
Most sturgeon species worldwide have been in steep decline since the 1900s. This research evaluated shovelnose sturgeon health, reproduction, and exposure to environmental contamination in the lower Platte River. Shovelnose sturgeon served as a surrogate species for the endangered pallid sturgeon and their health was assessed by incorporating measurements of general health with hepatic, immune, and reproductive system biomarkers. Environmental contaminants were measured in water, potential pallid sturgeon food items (cyprinid minnows), and shovelnose sturgeon digesta, liver, and blood plasma. Contaminants detected in shovelnose sturgeon at concentrations of concern included PCBs, selenium, and atrazine. Total PCBs in carcasses (n = …