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• W2533271710 endingPage "357" @default.
• W2533271710 startingPage "347" @default.
• W2533271710 abstract "Animals living in aquatic habitats regularly encounter anthropogenic chemical pollution. Typically, the toxicity of a chemical toxicant is determined by the median lethal concentration (LC50) through a static exposure test. However, LC50 values and static tests do not provide an accurate representation of exposure to pollutants within natural stream systems. In their native habitats, animals experience exposure as a fluctuating concentration due to turbulent mixing, temporal variations of contamination (seasonal inputs), and contaminant input type (point vs. non-point). Research has shown that turbulent environments produce exposures with a high degree of fluctuation in frequency, duration, and intensity. In order to more effectively evaluate the effects of pollutants, we created a dynamic exposure paradigm, utilizing both flow and substrate within a small mesocosm. A commonly used pharmaceutical, naproxen, was used as the toxicant and female crayfish (Orconectes virilis) as the target organism to investigate changes in fighting behavior as a result of dynamic exposure. Crayfish underwent either a 23h long static or a dynamic exposure to naproxen. Following exposure, the target crayfish and an unexposed size matched opponent underwent a 15min fight trial. These fight trials were recorded and later analyzed using a standard ethogram. Results indicate that exposure to sublethal concentrations of naproxen, in both static and flowing conditions, negatively impact aggressive behavior. Results also indicate that a dynamic exposure paradigm has a greater negative impact on behavior than a static exposure. Turbulence and habitat structure play important roles in shaping chemical exposure. Future research should incorporate features of dynamic chemical exposure in order to form a more comprehensive image of chemical exposure and predict the resulting sublethal effects from exposure. Possible techniques for assessment include utilizing flow-through experimental set-ups in tandem with behavioral or physiological endpoints as opposed to acute toxicity. Other possibilities of assessment could involve utilizing fine-scale chemical measurements of pollutants to determine the actual concentrations animals encounter during an exposure event." @default.
• W2533271710 created "2016-10-28" @default.
• W2533271710 creator A5024499568 @default.
• W2533271710 creator A5064595438 @default.
• W2533271710 date "2017-01-01" @default.
• W2533271710 modified "2023-09-27" @default.
• W2533271710 title "Mimicking natural systems: Changes in behavior as a result of dynamic exposure to naproxen" @default.
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• W2533271710 doi "https://doi.org/10.1016/j.ecoenv.2016.10.015" @default.
• W2533271710 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27770650" @default.
• W2533271710 hasPublicationYear "2017" @default.
• W2533271710 type Work @default.

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