Mark-resighting constitutes an advanced technology for estimating animal abundance. Joint hypergeometric maximum likelihood, Minta-Mangel and Bowden estimators are usually adopted with mark-resighting data. In presence of any tendency of animals to aggregate into groups, the Bowden estimator is the sole reliable method, providing that marks are quite evenly distributed among groups. In some cetacean surveys, marking disturbances are avoided through natural marking. Natural marking with Bowden criterion is used to estimate the abundance of street-dwelling populations. The marked individuals are persons identified and recorded in the initial part of the survey and recognizable in subsequent occasions. A simulation helps determine the performance of the Bowden estimator under a wide set of situations, taking into account key features of street-dwelling populations. When marked individuals are evenly distributed among groups, the strategy is efficient.

Fattorini, L., Ghellini, G. (2014). Estimating the size of street-dwelling populations using mark-resighting counts. MATHEMATICAL POPULATION STUDIES, 21, 2-11 [10.1080/08898480.2013.836336].

Estimating the size of street-dwelling populations using mark-resighting counts

FATTORINI, LORENZO;GHELLINI, GIULIO
2014-01-01

Abstract

Mark-resighting constitutes an advanced technology for estimating animal abundance. Joint hypergeometric maximum likelihood, Minta-Mangel and Bowden estimators are usually adopted with mark-resighting data. In presence of any tendency of animals to aggregate into groups, the Bowden estimator is the sole reliable method, providing that marks are quite evenly distributed among groups. In some cetacean surveys, marking disturbances are avoided through natural marking. Natural marking with Bowden criterion is used to estimate the abundance of street-dwelling populations. The marked individuals are persons identified and recorded in the initial part of the survey and recognizable in subsequent occasions. A simulation helps determine the performance of the Bowden estimator under a wide set of situations, taking into account key features of street-dwelling populations. When marked individuals are evenly distributed among groups, the strategy is efficient.
2014
Fattorini, L., Ghellini, G. (2014). Estimating the size of street-dwelling populations using mark-resighting counts. MATHEMATICAL POPULATION STUDIES, 21, 2-11 [10.1080/08898480.2013.836336].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/48395
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