Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effects of Dietary Methyl Parathion on Northern Bobwhite Egg Production and Eggshell Quality.
Author Bennett, J. K. ; Bennett, R. S. ;
CORP Author Corvallis Environmental Research Lab., OR. ;NSI Technology Services Corp., Corvallis, OR.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/403;
Stock Number PB91-171595
Additional Subjects Methyl parathion ; Birds ; Wildlife ; diet ; Dose-response relationships ; Food consumption ; Body weight ; Reprints ; Northern bobwhite ; Eggshells ; Egg production ; Colinus virginianis
Library Call Number Additional Info Location Last
NTIS  PB91-171595 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1991
Collation 7p
The effect of a short-term dietary methyl parathion exposure on northern bobwhite (Colinus virginianus) egg production and shell quality was investigated. Hens in egg production were fed either a methyl parathion diet (0,14,20,28 or 40 ppm) or a pair-fed diet (PF28 or PF40 received the same daily allotment of control feed on a g/kg/d basis as the 28 or 40 ppm-treated hen with whom she was paired) for 8 d. Daily food consumption was significantly reduced in all treatment groups and inversely related to chemical concentration. However, actual chemical consumption was similar for all methyl parathion-treated groups. Body weight, egg production, egg weight and eggshell strength, thickness and weight were reduced in the methyl parathion groups in a dose-related manner. Similar responses were observed in the pair-fed groups, indicating that effects were associated with a pesticide-induced reduction in food consumption. The dietary methyl parathion exposure impacted bobwhite egg production within 3 to 4 d and eggshell quality within 1 d of the onset of treatment.