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Summer foods of American widgeon, mallards, and a green-winged teal near Great Slave Lake, N.W.T

Canadian Field-Naturalist

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Abstract

Foods found in three species of dabbling ducks collected during summer from bog ponds, and sedge pools in taiga on the north side of Great Slave Lake, Northwest Territories, are described. Animal material in the esophageal contents of 10 adult American Widgeons (Mareca americana) averaged 31 i?? 34 per cent (P<0.05) by volume. A significantly higher percentage of animal material was found in Class I and II widgeon ducklings (66 i?? 22 per cent) than in Class IIIa ducklings and flying juveniles (12 i?? 20 per cent) of this species. Animal material comprised 87 i?? 35 per cent of esophageal contents from five Class II and flying juvenile Mallards (Anas platyrhynchos) and 100 per cent of that from an adult female Green-winged Teal (A. carolinensis).

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Summer foods of American widgeon, mallards, and a green-winged teal near Great Slave Lake, N.W.T
Series title:
Canadian Field-Naturalist
Volume
86
Issue:
4
Year Published:
1972
Language:
English
Description:
p. 373-376
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
373
Last page:
376
Number of Pages:
3