uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Evaluation of the analysis of distance sampling data: a simulation study
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Population and Conservation Biology.
2010 (English)In: Ornis Svecica, ISSN 1102-6812, Vol. 20, 43-53 p.Article in journal (Refereed) Published
Abstract [en]

Distance sampling is used to estimate number of indi- viduals in an area of interest. The idea is that with known distances to the observed individuals, one can model the probability of detection in relation to distance and thereby account for individuals that were not detected. Distances can be recorded either exactly or in discrete categories. In this study I validated the method using simulated dis- tance sampling data for two hypothetical bird species and compared the estimated density values to the known true densities. Generally the true densities and numbers of individuals were very similar to (and always within the 95% confidence interval of) the parameter estimates from the analysis of the simulated data. The analyses were also robust to modifications of the data such as truncation and

grouping of the distances into discrete categories. The confidence intervals increased, however, when using only two distance groups. Given that critical assumptions of the model can be met in the field situation, distance data can thus be used in a wide range of bird studies to calculate reliable density estimates.

Place, publisher, year, edition, pages
2010. Vol. 20, 43-53 p.
National Category
URN: urn:nbn:se:uu:diva-206865OAI: oai:DiVA.org:uu-206865DiVA: diva2:645771

Alternative title in Swedish: "Utvärdering av avståndsanalys av inventeringsdata: en simuleringsstudie".

Available from: 2013-09-05 Created: 2013-09-05 Last updated: 2013-09-06Bibliographically approved

Open Access in DiVA

Ekblom 2010(247 kB)243 downloads
File information
File name FULLTEXT01.pdfFile size 247 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Link to journal website

Search in DiVA

By author/editor
Ekblom, Robert
By organisation
Population and Conservation Biology
In the same journal
Ornis Svecica

Search outside of DiVA

GoogleGoogle Scholar
Total: 243 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 220 hits
ReferencesLink to record
Permanent link

Direct link