Effects of Water Conditions on Clutch Size, Egg Volume, and Hatchling Mass of Mallards and Gadwalls in the Prairie Pothole Region

Autor: Pietz, Pamela J., Krapu, Gary L., Buhl, Deborah A., Brandt, David A.
Zdroj: The Condor, 2000 Nov 01. 102(4), 936-940.
Databáze: JSTOR Journals