Accommodating unmodeled heterogeneity in double-observer distance sampling surveys. Borchers, D. L., Laake, J. L., Southwell, C., & Paxton, C. G. M. Biometrics, 62:372–378, Australian Antarctic Division, Channel Highway, Kingston, Tasmania 7050, Australia, 2006. abstract bibtex Mark-recapture models applied to double-observer distance sampling data neglect the information on relative detectability of objects contained in the distribution of observed distances. A difference between the observed distribution and that predicted by the mark-recapture model is symptomatic of a failure of the assumption of zero correlation between detection probabilities implicit in the mark-recapture model. We develop a mark-recapture-based model that uses the observed distribution to relax this assumption to zero correlation at only one distance. We demonstrate its usefulness in coping with unmodeled heterogeneity using data from an aerial survey of crabeater seals in the Antarctic.
@ARTICLE{Borchers2006,
author = {Borchers, D. L. and Laake, J. L. and Southwell, C. and Paxton, C.
G. M.},
title = {Accommodating unmodeled heterogeneity in double-observer distance
sampling surveys},
journal = {Biometrics},
year = {2006},
volume = {62},
pages = {372--378},
abstract = {Mark-recapture models applied to double-observer distance sampling
data neglect the information on relative detectability of objects
contained in the distribution of observed distances. A difference
between the observed distribution and that predicted by the mark-recapture
model is symptomatic of a failure of the assumption of zero correlation
between detection probabilities implicit in the mark-recapture model.
We develop a mark-recapture-based model that uses the observed distribution
to relax this assumption to zero correlation at only one distance.
We demonstrate its usefulness in coping with unmodeled heterogeneity
using data from an aerial survey of crabeater seals in the Antarctic.},
address = {Australian Antarctic Division, Channel Highway, Kingston, Tasmania
7050, Australia},
comment = {http://www.seaturtle.org/PDF/Borchers_2006_Biometrics.pdf},
file = {Borchersetal2006.pdf:Borchersetal2006.pdf:PDF},
keywords = {Distance sampling, Double observer, Heterogeneity, Mark-recapture,
Point independence},
owner = {eric},
subdatabase = {distance},
timestamp = {2006.11.05}
}
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