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Impacts of changing irrigation practices on waterfowl habitat use in the southern San Joaquin Valley, California

California Fish and Game

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Abstract

We used diurnal aerial census data to examine habitat use patterns of ducks wintering in the southern San Joaquin Valley, California from 1980-87. We calculated densities (birds/ha) for the northern pintail (Anas acuta), mallard (A. platyrhynchos), green-winged teal (A. crecca), cinnamon teal (A. cyanoptera), shoveler (A. clypeata), ruddy duck (Oxyura jamaicensis), and total ducks in each of 5 habitats. Densities of pintail and total ducks were greater in September than in other months. From October through January, density of teal and total ducks was greatest on Kern National Wildlife Refuge (NWR). Densities of ruddy duck and pintail were greatest on agricultural drainwater evaporation ponds and preirrigated cropland, respectively.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Impacts of changing irrigation practices on waterfowl habitat use in the southern San Joaquin Valley, California
Series title:
California Fish and Game
Volume
77
Issue:
1
Year Published:
1991
Language:
English
Description:
p. 10-21
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
California Fish and Game
First page:
10
Last page:
21
Number of Pages:
11