| Main Title |
Technical manual for basic version of the Markov chain nest productivity model (MCnest) / |
| Author |
R. S. Bennett ;
M. Etterson ;
Bennett, Richard S.
|
| Other Authors |
|
| CORP Author |
National Health and Environmental Effects Research Lab., Duluth, MN. Mid-Continent Ecology Div. (Duluth) Library. |
| Publisher |
U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Mid-Continent Ecology Division, |
| Year Published |
2013 |
| Report Number |
EPA/600/R-13/033 |
| Stock Number |
PB2013-108930 |
| OCLC Number |
852253890 |
| Subjects |
Markov processes ;
Bird populations--Mathematical models ;
Birds--Monitoring--Statistical methods
|
| Additional Subjects |
Birds ;
Nests ;
Productivity ;
Ducks ;
Exposure ;
Markov process ;
Pesticides ;
Reproduction(Biology) ;
Risk assessment ;
Toxicity ;
Mallards ;
Northern bobwhites
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| ELDD |
EPA 600-R-13-033 |
|
CCTE/GLTED Library/Duluth,MN |
07/15/2013 |
| NTIS |
PB2013-108930 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
89 p. : ill., charts ; 28 cm. |
| Abstract |
In the United States Environmental Protection Agency's (USEPA) current pesticide risk assessment process, a pair of laboratory avian reproduction tests with mallards (Anas platyrhynchos) and northern bobwhites (Colinus virginianus) is conducted to evaluate how dietary pesticide exposure affects a standard suite of reproduction endpoints (USEPA 1996). The results of these tests are used in calculating risk quotients (RQ) by comparing the reported no-observed-adverse-effect concentration (NOAEC) for the most sensitive measured endpoint(s) with estimates of the maximum dietary exposure expected for a given application rate. As a screening tool, RQs are compared to an established regulatory level-of-concern to categorize the potential for unacceptable risk. Because of the high degree of uncertainty in these simple tools for characterizing risk, RQs typically incorporate conservative or worst-case assumptions about exposure and toxicity to reduce the chances of concluding a chemical has an acceptable level of risk when in fact it does not (i.e., false negative conclusion). Consequently, risk quotients can be used to identify the environmental concentration above which adverse effects to avian reproduction may occur, but they cannot determine the probability or magnitude of potential reproductive effects. |
| Notes |
Cover title. "EPA/600/R/13/033." "February 2013." Includes bibliographical references (p. 70-75). |
