Main Title |
Effects of the Duration and Timing of Dietary Methyl Parathion Exposure on Bobwhite Reproduction. |
Author |
Bennett, R. S. ;
Bentley, R. ;
Shiroyama, T. ;
Bennett, J. K. ;
|
CORP Author |
Corvallis Environmental Research Lab., OR. ;NSI Technology Services Corp., Corvallis, OR. |
Publisher |
c1990 |
Year Published |
1990 |
Report Number |
EPA/600/J-90/402; |
Stock Number |
PB91-171587 |
Additional Subjects |
Methyl parathion ;
Birds ;
Wildlife ;
Reproduction(Biology) ;
Diet ;
Eggs ;
Dose-response relationships ;
Cholinesterase ;
Calcium ;
Body weight ;
Fertility ;
Reprints ;
Northern bobwhite ;
Colinus virginianus
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB91-171587 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
10p |
Abstract |
Two northern bobwhite (Colinus virginianus) reproduction tests were conducted concurrently to evaluate how the duration and time of initiation of methyl parathion exposure affected dose-response relationships of reproductive parameters. In the long-term exposure test, pairs of adult bobwhite were fed methyl parathion-amended diets (0,7,10,14,20 or 28 ppm) for 25 weeks: 10 weeks prior to the onset of laying, 6 weeks as they came into laying condition and 9 weeks during egg laying. In the short-term exposure test, quail received amended diets (0,10,14,20,28, or 40 ppm) for only three weeks during the egg laying period, followed by a three-week posttreatment period. Fourteen birds died in the long-term test, compared to two in the short-term test. Significant dose-related reductions in daily food consumption, egg production and the number of 14-d-old chicks were observed in both tests during the treatment periods. No dose-related effects on fertility, hatchability or chick weights were detected. In the long-term test there were dose-related decreases in adult body weight, brain and serum cholinesterase activity and female serum calcium concentrations. Cholinesterase and calcium were not measured in the short-term test. Eggshell weights were significantly decreased in both tests, but a dose-related decrease in eggshell strength and thickness was detected only in the short-term test. |
Supplementary Notes |
Pub. in Environmental Toxicology and Chemistry, v9 p1473-1480 1990. Prepared in cooperation with NSI Technology Services Corp., Corvallis, OR. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Effects of the Duration and Timing of Dietary Methyl Parathion Exposure on Bobwhite Reproduction. |
Category Codes |
68E; 57Z |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
114324687 |
Origin |
NTIS |
Type |
CAT |