Eggshell breakage by incubating black ducks fed DDE

Journal of Wildlife Management
By:  and 



Black duck (Anas rubripes) hens fed 10 ppm dry weight (approximately 3 ppm wet weight) of p,p'-DDE in the diet laid eggs with shells 22 percent thinner at the equator, 30 percent thinner at the cap, and 33 percent thinner at the apex than those of controls. Natural incubation increased shell cracking more than fourfold as compared with mechanical incubation. Hens removed cracked eggs from nests, and one hen terminated incubation. Hens fed DDE produced one-fifth as many ducklings as controls. DDE in eggs of dosed hens averaged 64.9 ppm wet weight.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Eggshell breakage by incubating black ducks fed DDE
Series title Journal of Wildlife Management
Volume 37
Issue 3
Year Published 1973
Language English
Contributing office(s) Patuxent Wildlife Research Center
Description 390-394
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Wildlife Management
First page 390
Last page 394