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Selective feeding by juvenile diving ducks in summer

The Auk

By:
and
https://doi.org/10.2307/4083407

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Abstract

Waterfowl often fail to use foods that seem plentiful to the investigator. The extent to which selective feeding or rejection of foods is a function of behavioral and morphological adaptations of the species, conditioned behavior of the individual, or individual preference for certain foods has not been appraised. The objectives of our study were to determine: (1) the extent of selective feeding among juvenile Canvasbacks (Aytha valisineria) and redheads (A. americana), (2) which food items were and which were not utilized, and (3) how selective use was related to the relative quality and availability of the food resource. In another paper (Bartonek and Hickey, MS) we present findings on the food habits of juvenile and adult Canvasbacks, Redheads, and Lesser Scaup (Aytha affinis) in southwestern Manitoba primarily during late spring and summer.

Only a few of the limited number of investigations into the summer food habits of waterfowl correlate use of foods with the relative quantity and/or availability of potential foods (White, 1936; Beard, 1953; Keith, 1961; Chura, 1961; Perret, 1962; Collias and Collias, 1963). Perret (1962) concluded that seasonal variations in the food habits of Mallards (Anas platyrhynchos) were related to changes in the availability of foods.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Selective feeding by juvenile diving ducks in summer
Series title:
The Auk
DOI:
10.2307/4083407
Volume:
86
Issue:
3
Year Published:
1969
Language:
English
Publisher:
American Ornithological Society
Description:
15 p.
First page:
443
Last page:
457
Country:
Canada
State:
Manitoba