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Estimating latent time of maturation and survival costs of reproduction in continuous time from capture-recapture data

Proceedings of the 2007 EURING Technical Meeting and Workshop held January 14-20, 2007 in Dunedin, New Zealand. OCLC: 213382236 PDF on file: 7050_Ergon.pdf
By:
, ,
Edited by:
David L. Thomson, Evan G. Cooch, Michael J. Conroy

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Abstract

In many species, age or time of maturation and survival costs of reproduction may vary substantially within and among populations. We present a capture-mark-recapture model to estimate the latent individual trait distribution of time of maturation (or other irreversible transitions) as well as survival differences associated with the two states (representing costs of reproduction). Maturation can take place at any point in continuous time, and mortality hazard rates for each reproductive state may vary according to continuous functions over time. Although we explicitly model individual heterogeneity in age/time of maturation, we make the simplifying assumption that death hazard rates do not vary among individuals within groups of animals. However, the estimates of the maturation distribution are fairly robust against individual heterogeneity in survival as long as there is no individual level correlation between mortality hazards and latent time of maturation. We apply the model to biweekly capture?recapture data of overwintering field voles (Microtus agrestis) in cyclically fluctuating populations to estimate time of maturation and survival costs of reproduction. Results show that onset of seasonal reproduction is particularly late and survival costs of reproduction are particularly large in declining populations.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Estimating latent time of maturation and survival costs of reproduction in continuous time from capture-recapture data
Series number:
3
Year Published:
2009
Language:
English
Publisher:
Springer
Publisher location:
New York and London
Contributing office(s):
Patuxent Wildlife Research Center
Description:
xxiv, 1136
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
First page:
173
Last page:
197