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Please use this identifier to cite or link to this item: http://hdl.handle.net/10023/784
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Title: Comparison of aerial survey methods for estimating abundance of common scoters
Authors: Rexstad, Eric
Buckland, Stephen T.
Issue Date: 2009
Citation: CREEM technical report ; 2009-01
Abstract: During the month of March, four survey methods were applied to the SPA at Camarthen Bay. WWT staff carried out visual aerial surveys using distance sampling methodology (Camphuysen et al. 2004). Visual shore-based counts were also conducted. Distance measures were not consistently taken by these observers, nor was survey effort equal among the four surveys. Because they are intended to be complete counts without replication within a day, it is not possible to estimate precision of these counts, or assess bias, making comparison with other survey results difficult. Digital still data were collected and processed by APEM Ltd. Digital video imagery were captured and processed by HiDef. This report revision includes 29 March survey data from HiDef not available at the time of the release of our 17 July report.
Version: Postprint
URI: http://hdl.handle.net/10023/784
Type: Report
Publication Status: Not published
Status: Non peer reviewed
Publisher: CREEM, University of St Andrews
Appears in Collections:Centre for Research into Ecological & Environmental Modelling (CREEM) Technical report series



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