Double‐Observer Line Transect Methods: Levels of Independence
Summary Double‐observer line transect methods are becoming increasingly widespread, especially for the estimation of marine mammal abundance from aerial and shipboard surveys when detection of animals on the line is uncertain. The resulting data supplement conventional distance sampling data with tw...
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crwiley:10.1111/j.1541-0420.2009.01239.x 2023-12-03T10:25:49+01:00 Double‐Observer Line Transect Methods: Levels of Independence Buckland, Stephen T. Laake, Jeffrey L. Borchers, David L. 2010 http://dx.doi.org/10.1111/j.1541-0420.2009.01239.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1541-0420.2009.01239.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1541-0420.2009.01239.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Biometrics volume 66, issue 1, page 169-177 ISSN 0006-341X 1541-0420 Applied Mathematics General Agricultural and Biological Sciences General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine Statistics and Probability journal-article 2010 crwiley https://doi.org/10.1111/j.1541-0420.2009.01239.x 2023-11-09T13:39:47Z Summary Double‐observer line transect methods are becoming increasingly widespread, especially for the estimation of marine mammal abundance from aerial and shipboard surveys when detection of animals on the line is uncertain. The resulting data supplement conventional distance sampling data with two‐sample mark–recapture data. Like conventional mark–recapture data, these have inherent problems for estimating abundance in the presence of heterogeneity. Unlike conventional mark–recapture methods, line transect methods use knowledge of the distribution of a covariate, which affects detection probability (namely, distance from the transect line) in inference. This knowledge can be used to diagnose unmodeled heterogeneity in the mark–recapture component of the data. By modeling the covariance in detection probabilities with distance, we show how the estimation problem can be formulated in terms of different levels of independence. At one extreme, full independence is assumed, as in the Petersen estimator (which does not use distance data); at the other extreme, independence only occurs in the limit as detection probability tends to one. Between the two extremes, there is a range of models, including those currently in common use, which have intermediate levels of independence. We show how this framework can be used to provide more reliable analysis of double‐observer line transect data. We test the methods by simulation, and by analysis of a dataset for which true abundance is known. We illustrate the approach through analysis of minke whale sightings data from the North Sea and adjacent waters. Article in Journal/Newspaper minke whale Wiley Online Library (via Crossref) Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) Biometrics 66 1 169 177 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Applied Mathematics General Agricultural and Biological Sciences General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine Statistics and Probability |
spellingShingle |
Applied Mathematics General Agricultural and Biological Sciences General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine Statistics and Probability Buckland, Stephen T. Laake, Jeffrey L. Borchers, David L. Double‐Observer Line Transect Methods: Levels of Independence |
topic_facet |
Applied Mathematics General Agricultural and Biological Sciences General Immunology and Microbiology General Biochemistry, Genetics and Molecular Biology General Medicine Statistics and Probability |
description |
Summary Double‐observer line transect methods are becoming increasingly widespread, especially for the estimation of marine mammal abundance from aerial and shipboard surveys when detection of animals on the line is uncertain. The resulting data supplement conventional distance sampling data with two‐sample mark–recapture data. Like conventional mark–recapture data, these have inherent problems for estimating abundance in the presence of heterogeneity. Unlike conventional mark–recapture methods, line transect methods use knowledge of the distribution of a covariate, which affects detection probability (namely, distance from the transect line) in inference. This knowledge can be used to diagnose unmodeled heterogeneity in the mark–recapture component of the data. By modeling the covariance in detection probabilities with distance, we show how the estimation problem can be formulated in terms of different levels of independence. At one extreme, full independence is assumed, as in the Petersen estimator (which does not use distance data); at the other extreme, independence only occurs in the limit as detection probability tends to one. Between the two extremes, there is a range of models, including those currently in common use, which have intermediate levels of independence. We show how this framework can be used to provide more reliable analysis of double‐observer line transect data. We test the methods by simulation, and by analysis of a dataset for which true abundance is known. We illustrate the approach through analysis of minke whale sightings data from the North Sea and adjacent waters. |
format |
Article in Journal/Newspaper |
author |
Buckland, Stephen T. Laake, Jeffrey L. Borchers, David L. |
author_facet |
Buckland, Stephen T. Laake, Jeffrey L. Borchers, David L. |
author_sort |
Buckland, Stephen T. |
title |
Double‐Observer Line Transect Methods: Levels of Independence |
title_short |
Double‐Observer Line Transect Methods: Levels of Independence |
title_full |
Double‐Observer Line Transect Methods: Levels of Independence |
title_fullStr |
Double‐Observer Line Transect Methods: Levels of Independence |
title_full_unstemmed |
Double‐Observer Line Transect Methods: Levels of Independence |
title_sort |
double‐observer line transect methods: levels of independence |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1541-0420.2009.01239.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1541-0420.2009.01239.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1541-0420.2009.01239.x |
long_lat |
ENVELOPE(-101.250,-101.250,-71.917,-71.917) |
geographic |
Petersen |
geographic_facet |
Petersen |
genre |
minke whale |
genre_facet |
minke whale |
op_source |
Biometrics volume 66, issue 1, page 169-177 ISSN 0006-341X 1541-0420 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1541-0420.2009.01239.x |
container_title |
Biometrics |
container_volume |
66 |
container_issue |
1 |
container_start_page |
169 |
op_container_end_page |
177 |
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1784274890697736192 |