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Conditional methodology for individual case history data

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Key ecological studies involve the regular censusing of populations of wild animals, resulting in individual case history data which record when marked individuals are seen alive and/or found dead. We show how current conditional methods of analysing case history data may be biased. We then show how a correction can be applied, making use of results from a mark–recovery–recapture analysis. This allows a simple investigation of the effect of time-varying individual covariates such as weight that often contain missing values. The work is motivated and illustrated by the study of Soay sheep in the St Kilda archipelago.
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Keywords: Conditional analysis; Integrated analysis; Mark–recapture–recovery; Soay sheep

Document Type: Research Article

Affiliations: 1: University of New South Wales at the Australian Defence Force Academy, Canberra, Australia. 2: University of Kent, Canterbury, UK. 3: University of Cambridge, UK.

Publication date: 2004-01-01

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