Estimating the encounter rate variance in distance sampling

Show simple item record Fewster, Rachel en Buckland, Stephen en Burnham, KP en Borchers, DL en Jupp, PE en Laake, JL en Thomas, Lisa en 2012-01-04T23:25:08Z en 2009 en
dc.identifier.citation Biometrics 65(1):225-236 2009 en
dc.identifier.issn 0006-341X en
dc.identifier.uri en
dc.description.abstract Summary: The dominant source of variance in line transect sampling is usually the encounter rate variance. Systematic survey designs are often used to reduce the true variability among different realizations of the design, but estimating the variance is difficult and estimators typically approximate the variance by treating the design as a simple random sample of lines. We explore the properties of different encounter rate variance estimators under random and systematic designs. We show that a design-based variance estimator improves upon the model-based estimator of Buckland et al. (2001, Introduction to Distance Sampling. Oxford: Oxford University Press, p. 79) when transects are positioned at random. However, if populations exhibit strong spatial trends, both estimators can have substantial positive bias under systematic designs. We show that poststratification is effective in reducing this bias. en
dc.publisher Wiley-Blackwell en
dc.relation.ispartofseries Biometrics en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from en
dc.rights.uri en
dc.title Estimating the encounter rate variance in distance sampling en
dc.type Journal Article en
dc.identifier.doi 10.1111/j.1541-0420.2008.01018.x en
pubs.issue 1 en
pubs.begin-page 225 en
pubs.volume 65 en
dc.rights.holder Copyright: Wiley-Blackwell en
dc.identifier.pmid 18363772 en
pubs.end-page 236 en
dc.rights.accessrights en
pubs.subtype Article en
pubs.elements-id 90895 en Science en Statistics en
pubs.record-created-at-source-date 2010-09-01 en
pubs.dimensions-id 18363772 en

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