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Survival and population size estimation in raptor studies: A comparison of two methods

Journal of Raptor Research

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Abstract

ABSTRACT.--The Jolly-Seber model is a capture-recapture model that can provide less-biased survival and population size estimates than those produced from simple counting procedures. Parameter estimation by simple counts and Jolly-Seber methods are based on certain assumptions that directly determine the validity of estimates. Evuluation of assumptions for parameter estimation is a focus of this paper and used as a basis for determining which methods are more likely to produce better estimates. An example of population size and survival estimation for a peregrine falcon(Falco peregrinus) population in western Greenland is used to compare the two methods.Based on results from the Greenland peregrine population, and an assessment of the underlying assumptions of simple counts and the Jolly-Seber model,we suggest that Jolly-Seber estimation of survival and population size is less biased than simple counts in studies with marked birds. We recommend the use of a Jolly-Seber analysis of data when capture-recapture techniques are employed in raptor population studies.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Survival and population size estimation in raptor studies: A comparison of two methods
Series title:
Journal of Raptor Research
Volume
29
Issue:
4
Year Published:
1995
Language:
English
Contributing office(s):
Forest and Rangeland Ecosystem Science Center
Description:
p. 256-264
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
256
Last page:
264
Number of Pages:
9