McCrea, R.S. and Morgan, B.J.T. and Cole, D.J. (2013) Age-dependent mixture models for recovery data on animals marked at unknown age. Journal of the Royal Statistical Society: Series C (Applied Statistics), 62 (1). pp. 101-113. ISSN 0035-9254.
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Data are often collected from wild animals that have been marked at unknown age. As a result, standard probability models, fitted by maximum likelihood, cannot incorporate age dependence in probabilities of annual survival.We propose and fit new mixture models to ring–recovery data on birds ringed of unknown age, in which it is possible to incorporate age dependence in survival. It is shown that it is important to analyse simultaneously data on animals marked as young, and of known age, as otherwise the mixture model is parameter redundant. The potential of the approach is illustrated by a new analysis of data on mallards, Anas platyrhynchos, and the wider performance of the approach is demonstrated through simulation.The models provide a way of analysing correctly large numbers of historical data sets.
|Uncontrolled keywords:||Age dependence; Mixture models; Parameter redundancy; Ring–recovery data|
|Subjects:||Q Science > QA Mathematics (inc Computing science) > QA276 Mathematical statistics|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Mathematics Statistics and Actuarial Science > Statistics|
|Depositing User:||Diana Cole|
|Date Deposited:||04 Oct 2012 08:37|
|Last Modified:||23 Jan 2013 09:37|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/31242 (The current URI for this page, for reference purposes)|
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