An Integrated Population Model From Constant Effort Bird-Ringing Data |
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Authors: | Vanessa M Cave Ruth King Stephen N Freeman |
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Institution: | (1) Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, Fife, KY16 9LZ, U.K.;(2) Centre for Ecology and Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire, OX10 8BB, U.K. |
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Abstract: | Data from annual bird-ringing programs, in which catch effort is standardized, are routinely used to index abundance, productivity,
and adult survival. Efficient models have been developed for each. Such monitoring schemes, based on ringing across a number
of sites, are perhaps unique in providing this combination of demographic information and make the data particularly amenable
to an integrated approach to population modeling. We develop a Bayesian approach and a deterministic population model uniting
abundance, productivity, and survival. The method is applied to sedge warbler Acrocephalus schoenobaenus data from the British Trust for Ornithology’s Constant Effort Sites scheme. The possibility of “transient” birds needs to
be incorporated within this analysis. We demonstrate how current methodology can efficiently be extended to use additional
data from multiple within year recaptures when controlling for transience. Supplemental materials for this article are available
online. |
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