Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea
Summary Automated detection systems employing advanced technology (e.g. infrared imagery, auditory recording systems, pattern recognition software) are compelling tools for gathering animal abundance and distribution data since investigators can often collect data more efficiently and reduce animal...
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Online Access: | http://dx.doi.org/10.1111/2041-210x.12127 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F2041-210X.12127 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/2041-210X.12127 |
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crwiley:10.1111/2041-210x.12127 2024-09-30T14:33:07+00:00 Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea Conn, Paul B. Ver Hoef, Jay M. McClintock, Brett T. Moreland, Erin E. London, Josh M. Cameron, Michael F. Dahle, Shawn P. Boveng, Peter L. Francis, Charles 2013 http://dx.doi.org/10.1111/2041-210x.12127 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F2041-210X.12127 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/2041-210X.12127 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Methods in Ecology and Evolution volume 5, issue 12, page 1280-1293 ISSN 2041-210X 2041-210X journal-article 2013 crwiley https://doi.org/10.1111/2041-210x.12127 2024-09-05T05:06:14Z Summary Automated detection systems employing advanced technology (e.g. infrared imagery, auditory recording systems, pattern recognition software) are compelling tools for gathering animal abundance and distribution data since investigators can often collect data more efficiently and reduce animal disturbance relative to surveys using human observers. Even with these improvements, analysing animal abundance with advanced technology can be challenging because of potential for incomplete detection, false positives and species misidentification. We argue that double sampling with an independent sampling method can provide the critical information needed to account for such errors. We present a hierarchical modelling framework for jointly analysing automated detection and double sampling data obtained during animal population surveys. Under our framework, observed counts in different sampling units are conceptualized as having arisen from a thinned log‐Gaussian Cox process subject to spatial autocorrelation (where thinning accounts for incomplete detection). For multispecies surveys, our approach handles incomplete species observations owing to (i) structural uncertainties (e.g. in cases where the automatic detection data do not provide species observations) and (ii) species misclassification; the latter requires auxiliary information on the misclassification process. As an example of combining an automated detection system and a double sampling procedure, we consider the problem of estimating animal abundance from aerial surveys that use infrared imagery to detect animals, and independent, high‐resolution digital photography to provide information on species composition and thermal detection accuracy. We illustrate our approach by analysing simulated data and data from a survey of four ice‐associated seal species in the eastern Bering Sea. Our analysis indicated reasonable performance of our hierarchical modelling approach, but suggested a need to balance model complexity with the richness of the data set. For ... Article in Journal/Newspaper Bering Sea Wiley Online Library Bering Sea Methods in Ecology and Evolution 5 12 1280 1293 |
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Wiley Online Library |
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language |
English |
description |
Summary Automated detection systems employing advanced technology (e.g. infrared imagery, auditory recording systems, pattern recognition software) are compelling tools for gathering animal abundance and distribution data since investigators can often collect data more efficiently and reduce animal disturbance relative to surveys using human observers. Even with these improvements, analysing animal abundance with advanced technology can be challenging because of potential for incomplete detection, false positives and species misidentification. We argue that double sampling with an independent sampling method can provide the critical information needed to account for such errors. We present a hierarchical modelling framework for jointly analysing automated detection and double sampling data obtained during animal population surveys. Under our framework, observed counts in different sampling units are conceptualized as having arisen from a thinned log‐Gaussian Cox process subject to spatial autocorrelation (where thinning accounts for incomplete detection). For multispecies surveys, our approach handles incomplete species observations owing to (i) structural uncertainties (e.g. in cases where the automatic detection data do not provide species observations) and (ii) species misclassification; the latter requires auxiliary information on the misclassification process. As an example of combining an automated detection system and a double sampling procedure, we consider the problem of estimating animal abundance from aerial surveys that use infrared imagery to detect animals, and independent, high‐resolution digital photography to provide information on species composition and thermal detection accuracy. We illustrate our approach by analysing simulated data and data from a survey of four ice‐associated seal species in the eastern Bering Sea. Our analysis indicated reasonable performance of our hierarchical modelling approach, but suggested a need to balance model complexity with the richness of the data set. For ... |
author2 |
Francis, Charles |
format |
Article in Journal/Newspaper |
author |
Conn, Paul B. Ver Hoef, Jay M. McClintock, Brett T. Moreland, Erin E. London, Josh M. Cameron, Michael F. Dahle, Shawn P. Boveng, Peter L. |
spellingShingle |
Conn, Paul B. Ver Hoef, Jay M. McClintock, Brett T. Moreland, Erin E. London, Josh M. Cameron, Michael F. Dahle, Shawn P. Boveng, Peter L. Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
author_facet |
Conn, Paul B. Ver Hoef, Jay M. McClintock, Brett T. Moreland, Erin E. London, Josh M. Cameron, Michael F. Dahle, Shawn P. Boveng, Peter L. |
author_sort |
Conn, Paul B. |
title |
Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
title_short |
Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
title_full |
Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
title_fullStr |
Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
title_full_unstemmed |
Estimating multispecies abundance using automated detection systems: ice‐associated seals in the Bering Sea |
title_sort |
estimating multispecies abundance using automated detection systems: ice‐associated seals in the bering sea |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/2041-210x.12127 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2F2041-210X.12127 https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/2041-210X.12127 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Methods in Ecology and Evolution volume 5, issue 12, page 1280-1293 ISSN 2041-210X 2041-210X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/2041-210x.12127 |
container_title |
Methods in Ecology and Evolution |
container_volume |
5 |
container_issue |
12 |
container_start_page |
1280 |
op_container_end_page |
1293 |
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1811637126554451968 |