An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds
Biological Report
3
By: D. W. Sparling, J.A. Barzen, J.R. Lovvorn, and J.R. Serie
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Abstract
Regression equations that use mensural data to estimate body condition have been developed for several water birds. These equations often have been based on data that represent different sexes, age classes, or seasons, without being adequately tested for intergroup differences. We used proximate carcass analysis of 538 adult and juvenile canvasbacks (Aythya valisineria ) collected during fall migration, winter, and spring migrations in 1975-76 and 1982-85 to test regression methods for estimating body condition.
Suggested Citation
Sparling, D.W., Barzen, J., Lovvorn, J., Serie, J., 1992, An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds: Biological Report 3, iii, 11 p.
| Publication type | Report |
|---|---|
| Publication Subtype | Federal Government Series |
| Title | An evaluation of regression methods to estimate nutritional condition of canvasbacks and other water birds |
| Series title | Biological Report |
| Series number | 3 |
| Year Published | 1992 |
| Language | English |
| Publisher | U.S. Fish and Wildlife Service |
| Contributing office(s) | Northern Prairie Wildlife Research Center, Patuxent Wildlife Research Center |
| Description | iii, 11 p. |