Aaron DeLonay
Aaron is an Ecologist at the Columbia Environmental Research Center.
Science and Products
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Use of automated monitoring to assess behavioral toxicology in fish: Linking behavior and physiology Use of automated monitoring to assess behavioral toxicology in fish: Linking behavior and physiology
We measured locomotory behaviors (distance traveled, speed, tortuosity of path, and rate of change in direction) with computer-assisted analysis in 30 day posthatch rainbow trout (Oncorhynchus mykiss) exposed to pesticides. We also examined cholinesterase inhibition as a potential endpoint linking physiology and behavior. Sublethal exposure to chemicals often causes changes in swimming...
Authors
S.K. Brewer, A. J. DeLonay, S.L. Beauvais, E. E. Little, S.B. Jones
Behavioral avoidance: Possible mechanism for explaining abundanc and distribution of trout species in a metal-impacted river Behavioral avoidance: Possible mechanism for explaining abundanc and distribution of trout species in a metal-impacted river
Behavioral avoidance of metal mixtures by rainbow trout (Oncorhynchus mykiss) was determined in the laboratory under water quality conditions that simulated the upper Clark Fork River, Montana, USA. A metal mixture with a fixed ratio of observed ambient metal concentrations (12 μg/L Cu:1.1 μg/L Cd:3.2 μg/L Pb:50 μg/L Zn) was used to determine avoidance in a countercurrent avoidance...
Authors
James A. Hansen, Daniel F. Woodward, Edward E. Little, Aaron J. DeLonay, Harold L. Bergman
Environmental toxicology and risk assessment: Seventh volume Environmental toxicology and risk assessment: Seventh volume
This publication, Environmental Toxicology and Risk Assessment: Seventh Volume, contains papers presented at the Seventh Symposium on Toxicology and Risk Assessment: Ultraviolet Radiation and the Environment, held 7-9 April, 1997 in St. Louis, MO. The symposium, the 24th in a series on environmental toxicology, was sponsored by Committee E-47. Edward E. Little, of the U.S. Geological...
Methods for assessing the impacts of ultraviolet-B radiation on aquatic invertebrates Methods for assessing the impacts of ultraviolet-B radiation on aquatic invertebrates
A standard methodology for assessing the impacts of simulated solar ultraviolet-B radiation (UV-B) on aquatic invertebrates was established. A solar simulator was used to expose a variety of aquatic invertebrates to different levels of UV-B. The simulator was calibrated as close as possible to match local ambient solar radiation measured in and out of water with a scanning...
Authors
R.D. Hurtubise, Edward E. Little, J.E. Havel
Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95 Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95
Bed-sediment samples from streams were collected from 443 sites in 19 major river basins during 1992-95 and analyzed for semivolatile organic compounds (SVOCs) to assess the occurrence and distribution of selected Hydrophobic contaminants. Forty SVOCs were detected in more than 5 percent of samples. Of these 40 SVOCs, 27 were polycyclic aromatic hydrocarbons (PAHs), 5 were azaarenes, 5...
Authors
Thomas J. Lopes, Edward T. Furlong, Jeffrey W. Pritt
Measures of fish behavior as indicators of sublethal toxicosis during standard toxicity tests Measures of fish behavior as indicators of sublethal toxicosis during standard toxicity tests
Behavioral functions essential for growth and survival can be dramatically altered by sublethal exposure to toxicants. Measures of these behavioral responses are effective in detecting adverse effects of sublethal contaminant exposure. Behavioral responses of fishes can be qualitatively and quantitatively evaluated during routine toxicity tests. At selected intervals of exposure...
Authors
E. E. Little, A. J. DeLonay
Science and Products
Filter Total Items: 42
No results found.
Filter Total Items: 56
Use of automated monitoring to assess behavioral toxicology in fish: Linking behavior and physiology Use of automated monitoring to assess behavioral toxicology in fish: Linking behavior and physiology
We measured locomotory behaviors (distance traveled, speed, tortuosity of path, and rate of change in direction) with computer-assisted analysis in 30 day posthatch rainbow trout (Oncorhynchus mykiss) exposed to pesticides. We also examined cholinesterase inhibition as a potential endpoint linking physiology and behavior. Sublethal exposure to chemicals often causes changes in swimming...
Authors
S.K. Brewer, A. J. DeLonay, S.L. Beauvais, E. E. Little, S.B. Jones
Behavioral avoidance: Possible mechanism for explaining abundanc and distribution of trout species in a metal-impacted river Behavioral avoidance: Possible mechanism for explaining abundanc and distribution of trout species in a metal-impacted river
Behavioral avoidance of metal mixtures by rainbow trout (Oncorhynchus mykiss) was determined in the laboratory under water quality conditions that simulated the upper Clark Fork River, Montana, USA. A metal mixture with a fixed ratio of observed ambient metal concentrations (12 μg/L Cu:1.1 μg/L Cd:3.2 μg/L Pb:50 μg/L Zn) was used to determine avoidance in a countercurrent avoidance...
Authors
James A. Hansen, Daniel F. Woodward, Edward E. Little, Aaron J. DeLonay, Harold L. Bergman
Environmental toxicology and risk assessment: Seventh volume Environmental toxicology and risk assessment: Seventh volume
This publication, Environmental Toxicology and Risk Assessment: Seventh Volume, contains papers presented at the Seventh Symposium on Toxicology and Risk Assessment: Ultraviolet Radiation and the Environment, held 7-9 April, 1997 in St. Louis, MO. The symposium, the 24th in a series on environmental toxicology, was sponsored by Committee E-47. Edward E. Little, of the U.S. Geological...
Methods for assessing the impacts of ultraviolet-B radiation on aquatic invertebrates Methods for assessing the impacts of ultraviolet-B radiation on aquatic invertebrates
A standard methodology for assessing the impacts of simulated solar ultraviolet-B radiation (UV-B) on aquatic invertebrates was established. A solar simulator was used to expose a variety of aquatic invertebrates to different levels of UV-B. The simulator was calibrated as close as possible to match local ambient solar radiation measured in and out of water with a scanning...
Authors
R.D. Hurtubise, Edward E. Little, J.E. Havel
Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95 Occurrence and distribution of semivolatile organic compounds in stream bed sediments, United States, 1992-95
Bed-sediment samples from streams were collected from 443 sites in 19 major river basins during 1992-95 and analyzed for semivolatile organic compounds (SVOCs) to assess the occurrence and distribution of selected Hydrophobic contaminants. Forty SVOCs were detected in more than 5 percent of samples. Of these 40 SVOCs, 27 were polycyclic aromatic hydrocarbons (PAHs), 5 were azaarenes, 5...
Authors
Thomas J. Lopes, Edward T. Furlong, Jeffrey W. Pritt
Measures of fish behavior as indicators of sublethal toxicosis during standard toxicity tests Measures of fish behavior as indicators of sublethal toxicosis during standard toxicity tests
Behavioral functions essential for growth and survival can be dramatically altered by sublethal exposure to toxicants. Measures of these behavioral responses are effective in detecting adverse effects of sublethal contaminant exposure. Behavioral responses of fishes can be qualitatively and quantitatively evaluated during routine toxicity tests. At selected intervals of exposure...
Authors
E. E. Little, A. J. DeLonay