Record Display for the EPA National Library Catalog


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 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
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.