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Maximum likelihood methods for investigating reporting rates of rings on hunter-shot birds

By:
Edited by:
B.J.T. Morgan and P.M. North

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Abstract

It is well known that hunters do not report 100% of the rings that they find on shot birds. Reward studies can be used to estimate what this reporting rate is, by comparison of recoveries of rings offering a monetary reward, to ordinary rings. A reward study of American Black Ducks (Anas rubripes) is used to illustrate the design, and to motivate the development of statistical models for estimation and for testing hypotheses of temporal and geographic variation in reporting rates. The method involves indexing the data (recoveries) and parameters (reporting, harvest, and solicitation rates) by geographic and temporal strata. Estimates are obtained under unconstrained (e.g., allowing temporal variability in reporting rates) and constrained (e.g., constant reporting rates) models, and hypotheses are tested by likelihood ratio. A FORTRAN program, available from the author, is used to perform the computations.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Maximum likelihood methods for investigating reporting rates of rings on hunter-shot birds
Year Published:
1985
Language:
English
Publisher:
Springer-Verlag
Publisher location:
New York, New York
Contributing office(s):
Patuxent Wildlife Research Center
Description:
xxv, 418
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Statistics in Ornithology
First page:
215
Last page:
241