Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
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
Author Title of a Work
Etterson, Matthew
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
Description Access URL
Library Call Number Additional Info Location Last
ELDD  EPA 600-R-13-033 CCTE/GLTED Library/Duluth,MN 07/15/2013
NTIS  PB2013-108930 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/17/2014
Collation 89 p. : ill., charts ; 28 cm.
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.
Cover title. "EPA/600/R/13/033." "February 2013." Includes bibliographical references (p. 70-75).