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Factors affecting the distribution of mallards wintering in the Mississippi alluvial valley

Auk

Received award for Outstanding Publication from the Southeastern Section of the Wildlife Society.
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Abstract

The Mississippi Alluvial Valley (MAV) is the principal wintering area for mallards (Anas platyrhynchos ) in the Mississippi Flyway. Here the authors consider it a distinct habitat, i.e., fitness is relatively homogeneous among ducks within the MAV but different from that of ducks in other such habitats. They analyzed recovery distributions of mallards banded preseason (July-September 1950-1980) to test hypotheses concerning the effects of winter temperatures, precipitation, and population levels on mallard winter distribution. When two groups of years that comprised extremes of warm and cold winter weather were compared, recovery distributions of all four age and sex classes (adult males and females, young males and females) differed significantly; recoveries were located farther south in cold years. The authors concluded that temperature, water conditions, and population size affect the habitat suitability of mallard wintering areas and that mallards exhibit considerable flexibility in winter distribution associated with these factors.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Factors affecting the distribution of mallards wintering in the Mississippi alluvial valley
Series title:
Auk
Volume
100
Issue:
4
Year Published:
1983
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
932-946
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Auk
First page:
932
Last page:
946
Number of Pages:
15