Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance
The results of a double-marking experiment using natural markings and microsatellite genetic markers to identify humpback whales (Megaptera novaeangliae) confirm that natural markings are a reliable means of identifying individuals on a large scale. Of 1410 instances of double tagging, there were 41...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2001
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Online Access: | https://hdl.handle.net/11370/f3939871-8263-45ea-acff-0af2db6101c6 https://research.rug.nl/en/publications/f3939871-8263-45ea-acff-0af2db6101c6 https://doi.org/10.1139/cjfas-58-9-1861 |
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ftunigroningenpu:oai:pure.rug.nl:publications/f3939871-8263-45ea-acff-0af2db6101c6 2024-06-23T07:54:32+00:00 Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance Stevick, PT Palsboll, PJ Smith, TD Bravington, MV Hammond, PS 2001-09 https://hdl.handle.net/11370/f3939871-8263-45ea-acff-0af2db6101c6 https://research.rug.nl/en/publications/f3939871-8263-45ea-acff-0af2db6101c6 https://doi.org/10.1139/cjfas-58-9-1861 eng eng https://research.rug.nl/en/publications/f3939871-8263-45ea-acff-0af2db6101c6 info:eu-repo/semantics/closedAccess Stevick , PT , Palsboll , PJ , Smith , TD , Bravington , MV & Hammond , PS 2001 , ' Errors in identification using natural markings : Rates, sources, and effects on capture-recapture estimates of abundance ' , Canadian Journal of Fisheries and Aquatic Sciences , vol. 58 , no. 9 , pp. 1861-1870 . https://doi.org/10.1139/cjfas-58-9-1861 HUMPBACK WHALES TAG LOSS PHOTOGRAPHIC IDENTIFICATION MEGAPTERA-NOVAEANGLIAE POPULATION PATTERN SEALS article 2001 ftunigroningenpu https://doi.org/10.1139/cjfas-58-9-1861 2024-06-03T16:33:57Z The results of a double-marking experiment using natural markings and microsatellite genetic markers to identify humpback whales (Megaptera novaeangliae) confirm that natural markings are a reliable means of identifying individuals on a large scale. Of 1410 instances of double tagging, there were 414 resightings. No false positive and 14 false negative errors were identified. The rate of error increased with decreasing photographic quality; no errors were observed among photographs of the highest quality rating, whereas an error rate of 0.125 was identified in sightings for which only part of the area used for identification was visible. There was also a weaker relationship between error rate and the distinctiveness of markings, which may result from non-independence in coding for image quality and distinctiveness. A correction is developed for the Petersen two-sample abundance estimator to account for false negative errors in identification, and a parametric bootstrap procedure for estimation of variance is also developed. In application to abundance estimates from the North Atlantic, the correction reduces the bias in estimates made using poorer quality photographs to a negligible level while maintaining comparable precision. Article in Journal/Newspaper Megaptera novaeangliae North Atlantic University of Groningen research database Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) Canadian Journal of Fisheries and Aquatic Sciences 58 9 1861 1870 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
HUMPBACK WHALES TAG LOSS PHOTOGRAPHIC IDENTIFICATION MEGAPTERA-NOVAEANGLIAE POPULATION PATTERN SEALS |
spellingShingle |
HUMPBACK WHALES TAG LOSS PHOTOGRAPHIC IDENTIFICATION MEGAPTERA-NOVAEANGLIAE POPULATION PATTERN SEALS Stevick, PT Palsboll, PJ Smith, TD Bravington, MV Hammond, PS Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
topic_facet |
HUMPBACK WHALES TAG LOSS PHOTOGRAPHIC IDENTIFICATION MEGAPTERA-NOVAEANGLIAE POPULATION PATTERN SEALS |
description |
The results of a double-marking experiment using natural markings and microsatellite genetic markers to identify humpback whales (Megaptera novaeangliae) confirm that natural markings are a reliable means of identifying individuals on a large scale. Of 1410 instances of double tagging, there were 414 resightings. No false positive and 14 false negative errors were identified. The rate of error increased with decreasing photographic quality; no errors were observed among photographs of the highest quality rating, whereas an error rate of 0.125 was identified in sightings for which only part of the area used for identification was visible. There was also a weaker relationship between error rate and the distinctiveness of markings, which may result from non-independence in coding for image quality and distinctiveness. A correction is developed for the Petersen two-sample abundance estimator to account for false negative errors in identification, and a parametric bootstrap procedure for estimation of variance is also developed. In application to abundance estimates from the North Atlantic, the correction reduces the bias in estimates made using poorer quality photographs to a negligible level while maintaining comparable precision. |
format |
Article in Journal/Newspaper |
author |
Stevick, PT Palsboll, PJ Smith, TD Bravington, MV Hammond, PS |
author_facet |
Stevick, PT Palsboll, PJ Smith, TD Bravington, MV Hammond, PS |
author_sort |
Stevick, PT |
title |
Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
title_short |
Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
title_full |
Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
title_fullStr |
Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
title_full_unstemmed |
Errors in identification using natural markings:Rates, sources, and effects on capture-recapture estimates of abundance |
title_sort |
errors in identification using natural markings:rates, sources, and effects on capture-recapture estimates of abundance |
publishDate |
2001 |
url |
https://hdl.handle.net/11370/f3939871-8263-45ea-acff-0af2db6101c6 https://research.rug.nl/en/publications/f3939871-8263-45ea-acff-0af2db6101c6 https://doi.org/10.1139/cjfas-58-9-1861 |
long_lat |
ENVELOPE(-101.250,-101.250,-71.917,-71.917) |
geographic |
Petersen |
geographic_facet |
Petersen |
genre |
Megaptera novaeangliae North Atlantic |
genre_facet |
Megaptera novaeangliae North Atlantic |
op_source |
Stevick , PT , Palsboll , PJ , Smith , TD , Bravington , MV & Hammond , PS 2001 , ' Errors in identification using natural markings : Rates, sources, and effects on capture-recapture estimates of abundance ' , Canadian Journal of Fisheries and Aquatic Sciences , vol. 58 , no. 9 , pp. 1861-1870 . https://doi.org/10.1139/cjfas-58-9-1861 |
op_relation |
https://research.rug.nl/en/publications/f3939871-8263-45ea-acff-0af2db6101c6 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1139/cjfas-58-9-1861 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
58 |
container_issue |
9 |
container_start_page |
1861 |
op_container_end_page |
1870 |
_version_ |
1802646726107987968 |