Integrating Mark–Recapture–Recovery and Census Data to Estimate Animal Abundance and Demographic Parameters
2002
Besbeas, P. | Freeman, S. N. | Morgan, B. J. T. | Catchpole, E. A.
In studies of wild animals, one frequently encounters both census and markârecaptureârecovery data. We show how a stateâspace model for census data in combination with the usual multinomialâbased models for ringârecovery data provide estimates of productivity not available from either type of data alone. The approach is illustrated on two British bird species. For the lapwing, we calibrate how its recent decline could be due to a decrease in productivity. For the heron, there is no evidence for a decline in productivity, and the combined analysis increases significantly the strength of logistic regressions of survival on winter severity.
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