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Estimating carcass fat and protein in northern pintails during the nonbreeding season

Journal of Wildlife Management
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Abstract

I used northern pintails (Anas acuta) collected from August through March 1979-82 in the Sacramento Valley, California to derive equations to predict ether-extracted carcass fat, carcass protein, and skeletal lean dry weight. Ether-extracted carcass fat was best predicted by total fat depot weight (wet skin, abdominal fat, and intestinal fat) (r2 = 0.94) and estimates based on carcass water content (r2 = 0.93-0.98). Measured carcass protein was best predicted by a multiple regression including total protein depot weight (breast muscles, leg muscles, and gizzard) and tarsus length (R2 = 0.79). I predicted skeletal lean dry weight by a multiple regression incorporating culmen, tarsus, and wing length (R2 = 0.77). Predicted carcass fat agreed well with measured carcass fat in an independent data set of 30 pintails using total fat depot (r2 = 0.92-0.96) and carcass water (r2 = 0.97-0.99), but predicted carcass protein agreed less well with measured protein.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Estimating carcass fat and protein in northern pintails during the nonbreeding season
Series title Journal of Wildlife Management
Volume 53
Issue 1
Year Published 1989
Language English
Contributing office(s) Northern Prairie Wildlife Research Center
Description p. 123-129
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Wildlife Management
First page 123
Last page 129