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...
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/5e0df8b3-9616-4c89-8644-d62c77df18ad 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 Palsbøll, P Smith, TD Bravington, MV Hammond, Philip Steven 2001-09 https://research-portal.st-andrews.ac.uk/en/researchoutput/errors-in-identification-using-natural-markings-rates-sources-and-effects-on-capturerecapture-estimates-of-abundance(5e0df8b3-9616-4c89-8644-d62c77df18ad).html http://www.scopus.com/inward/record.url?scp=17944372787&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/errors-in-identification-using-natural-markings-rates-sources-and-effects-on-capturerecapture-estimates-of-abundance(5e0df8b3-9616-4c89-8644-d62c77df18ad).html info:eu-repo/semantics/restrictedAccess Stevick , PT , Palsbøll , P , Smith , TD , Bravington , MV & Hammond , P S 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 , pp. 1861-1870 . HUMPBACK WHALES TAG LOSS PHOTOGRAPHIC IDENTIFICATION MEGAPTERA-NOVAEANGLIAE POPULATION PATTERN SEALS article 2001 ftunstandrewcris 2024-06-13T00:07:09Z 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 St Andrews: Research Portal Petersen ENVELOPE(-101.250,-101.250,-71.917,-71.917) |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
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 Palsbøll, P Smith, TD Bravington, MV Hammond, Philip Steven 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 Palsbøll, P Smith, TD Bravington, MV Hammond, Philip Steven |
author_facet |
Stevick, PT Palsbøll, P Smith, TD Bravington, MV Hammond, Philip Steven |
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://research-portal.st-andrews.ac.uk/en/researchoutput/errors-in-identification-using-natural-markings-rates-sources-and-effects-on-capturerecapture-estimates-of-abundance(5e0df8b3-9616-4c89-8644-d62c77df18ad).html http://www.scopus.com/inward/record.url?scp=17944372787&partnerID=8YFLogxK |
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 , Palsbøll , P , Smith , TD , Bravington , MV & Hammond , P S 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 , pp. 1861-1870 . |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/errors-in-identification-using-natural-markings-rates-sources-and-effects-on-capturerecapture-estimates-of-abundance(5e0df8b3-9616-4c89-8644-d62c77df18ad).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1802646726504349696 |