An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters
Natural marks occurring in cetaceans are used to measure population parameters, social structure and movements. However, the changeable nature of these marks can originate bias in these estimates. The aim of this work was to calculate abundance and prevalence of 28 mark types observed in common mink...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2015
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0025315415000284 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000284 |
id |
crcambridgeupr:10.1017/s0025315415000284 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0025315415000284 2024-03-03T08:46:32+00:00 An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters Bertulli, Chiara G. Rasmussen, Marianne H. Rosso, Massimiliano 2015 http://dx.doi.org/10.1017/s0025315415000284 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000284 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 96, issue 4, page 807-819 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0025315415000284 2024-02-08T08:38:12Z Natural marks occurring in cetaceans are used to measure population parameters, social structure and movements. However, the changeable nature of these marks can originate bias in these estimates. The aim of this work was to calculate abundance and prevalence of 28 mark types observed in common minke whales and white-beaked dolphins photographed in Icelandic waters for 11 years (2002–2013) in order to identify reliable markings which could be suitable for capture-mark-recapture studies. In the common minke whale subsample the most prevalent occurring marks were cookie-cutter shark bite, notch and lamprey bite, and herpes-like lesions and blisters were the most abundant. White-beaked dolphins had notch, fin patches and fine scrape as the most prevalent, and black mark and fine scrape were the most abundant. Loss and gain rates were also estimated resulting in eight mark types with no losses in common minke whales including fin outline and injury marks. In white-beaked dolphins there were 13 mark types with null loss rate among which there were notch, distinct notch and amputation. Our findings confirm that fin and injury marks are among the most accurate features to use for capture-mark-recapture studies as noted for other cetacean species. We also suggest including cookie-cutter shark bites for common minke whales and fin patches for white-beaked dolphins due to their low loss rate. These two mark types were amongst the most prevalent in both species, so their addition will be pivotal in increasing the power of analysis conducted using photo-identification data obtaining more accurate population estimates. Article in Journal/Newspaper minke whale Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 96 4 807 819 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Bertulli, Chiara G. Rasmussen, Marianne H. Rosso, Massimiliano An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
topic_facet |
Aquatic Science |
description |
Natural marks occurring in cetaceans are used to measure population parameters, social structure and movements. However, the changeable nature of these marks can originate bias in these estimates. The aim of this work was to calculate abundance and prevalence of 28 mark types observed in common minke whales and white-beaked dolphins photographed in Icelandic waters for 11 years (2002–2013) in order to identify reliable markings which could be suitable for capture-mark-recapture studies. In the common minke whale subsample the most prevalent occurring marks were cookie-cutter shark bite, notch and lamprey bite, and herpes-like lesions and blisters were the most abundant. White-beaked dolphins had notch, fin patches and fine scrape as the most prevalent, and black mark and fine scrape were the most abundant. Loss and gain rates were also estimated resulting in eight mark types with no losses in common minke whales including fin outline and injury marks. In white-beaked dolphins there were 13 mark types with null loss rate among which there were notch, distinct notch and amputation. Our findings confirm that fin and injury marks are among the most accurate features to use for capture-mark-recapture studies as noted for other cetacean species. We also suggest including cookie-cutter shark bites for common minke whales and fin patches for white-beaked dolphins due to their low loss rate. These two mark types were amongst the most prevalent in both species, so their addition will be pivotal in increasing the power of analysis conducted using photo-identification data obtaining more accurate population estimates. |
format |
Article in Journal/Newspaper |
author |
Bertulli, Chiara G. Rasmussen, Marianne H. Rosso, Massimiliano |
author_facet |
Bertulli, Chiara G. Rasmussen, Marianne H. Rosso, Massimiliano |
author_sort |
Bertulli, Chiara G. |
title |
An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
title_short |
An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
title_full |
An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
title_fullStr |
An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
title_full_unstemmed |
An assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in Icelandic waters |
title_sort |
assessment of the natural marking patterns used for photo-identification of common minke whales and white-beaked dolphins in icelandic waters |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0025315415000284 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315415000284 |
genre |
minke whale |
genre_facet |
minke whale |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 96, issue 4, page 807-819 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315415000284 |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
96 |
container_issue |
4 |
container_start_page |
807 |
op_container_end_page |
819 |
_version_ |
1792502572521619456 |