Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018
A ship-based mosaic survey of Northeast Atlantic cetaceans was conducted over a 5-year period between 2014–2018. The area surveyed extends from the North Sea in the south (southern boundary at 53oN), to the ice edge of the Barents Sea and the Greenland Sea. Survey vessels were equipped with 2 indepe...
Published in: | NAMMCO Scientific Publications |
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Septentrio Academic Publishing
2020
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Subjects: | |
Online Access: | https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694 https://doi.org/10.7557/3.4694 |
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ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/4694 |
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openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Septentrio Academic Publishing |
op_collection_id |
ftunitroemsoe |
language |
English |
topic |
North Atlantic cetacean abundance line-transect fin whales humpback whales sperm whales killer whales harbour porpoises dolphins northern bottlenose whales |
spellingShingle |
North Atlantic cetacean abundance line-transect fin whales humpback whales sperm whales killer whales harbour porpoises dolphins northern bottlenose whales Leonard, Deanna Øien, Nils Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
topic_facet |
North Atlantic cetacean abundance line-transect fin whales humpback whales sperm whales killer whales harbour porpoises dolphins northern bottlenose whales |
description |
A ship-based mosaic survey of Northeast Atlantic cetaceans was conducted over a 5-year period between 2014–2018. The area surveyed extends from the North Sea in the south (southern boundary at 53oN), to the ice edge of the Barents Sea and the Greenland Sea. Survey vessels were equipped with 2 independent observer platforms that detected whales in passing mode and applied tracking procedures for the target species, common minke whales (Balaenoptera acutorostrata acutorostrata). Here we present abundance estimates for all non-target species for which there were sufficient sightings. We estimate the abundance of fin whales (Balaenoptera physalus) to be 11,387 (CV=0.17, 95% CI: 8,072–16,063), of humpback whales (Megaptera novaeangliae) to be 10,708 (CV=0.38, 95% CI: 4,906–23,370), of sperm whales (Physeter macrocephalus) to be 5,704 (CV=0.26, 95% CI: 3,374–9,643), of killer whales (Orcinus orca) to be 15,056 (CV=0.29, 95% CI: 8,423–26,914), of harbour porpoises (Phocoena phocoena) to be 255,929 (CV=0.20, 95% CI: 172,742–379,175), dolphins of genus Lagenorhynchus to be 192,767 (CV=0.25, 95% CI: 114,033–325,863), and finally of northern bottlenose whales (Hyperoodon ampullatus) to be 7,800 (CV=0.28, 95% CI: 4,373–13,913). Additionally, our survey effort in the Norwegian Sea in 2015 contributed to the 6th North Atlantic Sightings Survey (NASS) and the survey was extended into the waters north and east of Iceland around Jan Mayen island. This NASS extension, along with our Norwegian Sea survey in 2015, was used to estimate the abundance of fin whales, humpback whales, and sperm whales. All estimates presented used mark-recapture distance sampling techniques and were thus corrected for perception bias. Our estimates do not account for additional variance due to distributional shifts between years or biases due to availability or responsive movement. |
format |
Article in Journal/Newspaper |
author |
Leonard, Deanna Øien, Nils |
author_facet |
Leonard, Deanna Øien, Nils |
author_sort |
Leonard, Deanna |
title |
Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
title_short |
Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
title_full |
Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
title_fullStr |
Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
title_full_unstemmed |
Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 |
title_sort |
estimated abundances of cetacean species in the northeast atlantic from norwegian shipboard surveys conducted in 2014–2018 |
publisher |
Septentrio Academic Publishing |
publishDate |
2020 |
url |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694 https://doi.org/10.7557/3.4694 |
geographic |
Barents Sea Greenland Jan Mayen Norwegian Sea |
geographic_facet |
Barents Sea Greenland Jan Mayen Norwegian Sea |
genre |
Balaenoptera acutorostrata Balaenoptera physalus Barents Sea Greenland Greenland Sea hyperoodon ampullatus Iceland Jan Mayen Jan Mayen Island Megaptera novaeangliae North Atlantic Northeast Atlantic Norwegian Sea Orca Orcinus orca Phocoena phocoena Physeter macrocephalus |
genre_facet |
Balaenoptera acutorostrata Balaenoptera physalus Barents Sea Greenland Greenland Sea hyperoodon ampullatus Iceland Jan Mayen Jan Mayen Island Megaptera novaeangliae North Atlantic Northeast Atlantic Norwegian Sea Orca Orcinus orca Phocoena phocoena Physeter macrocephalus |
op_source |
NAMMCO Scientific Publications; Vol. 11 (2019): Sightings Surveys in the North Atlantic: 30 years of counting whales 2309-2491 1560-2206 10.7557/3.11 |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5329 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5758 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5759 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5760 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5761 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5762 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5763 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5764 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5765 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5766 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5767 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5768 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5769 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5770 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5771 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5772 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694 doi:10.7557/3.4694 |
op_rights |
Copyright (c) 2020 Deanna Leonard, Nils Øien https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.7557/3.469410.7557/3.11 |
container_title |
NAMMCO Scientific Publications |
container_volume |
11 |
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1779313164837453824 |
spelling |
ftunitroemsoe:oai:ojs.henry.ub.uit.no:article/4694 2023-10-09T21:50:06+02:00 Estimated Abundances of Cetacean Species in the Northeast Atlantic from Norwegian Shipboard Surveys Conducted in 2014–2018 Leonard, Deanna Øien, Nils 2020-07-21 application/pdf image/tiff image/jpeg image/png https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694 https://doi.org/10.7557/3.4694 eng eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5329 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5758 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5759 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5760 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5761 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5762 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5763 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5764 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5765 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5766 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5767 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5768 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5769 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5770 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5771 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694/5772 https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4694 doi:10.7557/3.4694 Copyright (c) 2020 Deanna Leonard, Nils Øien https://creativecommons.org/licenses/by/4.0 NAMMCO Scientific Publications; Vol. 11 (2019): Sightings Surveys in the North Atlantic: 30 years of counting whales 2309-2491 1560-2206 10.7557/3.11 North Atlantic cetacean abundance line-transect fin whales humpback whales sperm whales killer whales harbour porpoises dolphins northern bottlenose whales info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2020 ftunitroemsoe https://doi.org/10.7557/3.469410.7557/3.11 2023-09-20T23:07:55Z A ship-based mosaic survey of Northeast Atlantic cetaceans was conducted over a 5-year period between 2014–2018. The area surveyed extends from the North Sea in the south (southern boundary at 53oN), to the ice edge of the Barents Sea and the Greenland Sea. Survey vessels were equipped with 2 independent observer platforms that detected whales in passing mode and applied tracking procedures for the target species, common minke whales (Balaenoptera acutorostrata acutorostrata). Here we present abundance estimates for all non-target species for which there were sufficient sightings. We estimate the abundance of fin whales (Balaenoptera physalus) to be 11,387 (CV=0.17, 95% CI: 8,072–16,063), of humpback whales (Megaptera novaeangliae) to be 10,708 (CV=0.38, 95% CI: 4,906–23,370), of sperm whales (Physeter macrocephalus) to be 5,704 (CV=0.26, 95% CI: 3,374–9,643), of killer whales (Orcinus orca) to be 15,056 (CV=0.29, 95% CI: 8,423–26,914), of harbour porpoises (Phocoena phocoena) to be 255,929 (CV=0.20, 95% CI: 172,742–379,175), dolphins of genus Lagenorhynchus to be 192,767 (CV=0.25, 95% CI: 114,033–325,863), and finally of northern bottlenose whales (Hyperoodon ampullatus) to be 7,800 (CV=0.28, 95% CI: 4,373–13,913). Additionally, our survey effort in the Norwegian Sea in 2015 contributed to the 6th North Atlantic Sightings Survey (NASS) and the survey was extended into the waters north and east of Iceland around Jan Mayen island. This NASS extension, along with our Norwegian Sea survey in 2015, was used to estimate the abundance of fin whales, humpback whales, and sperm whales. All estimates presented used mark-recapture distance sampling techniques and were thus corrected for perception bias. Our estimates do not account for additional variance due to distributional shifts between years or biases due to availability or responsive movement. Article in Journal/Newspaper Balaenoptera acutorostrata Balaenoptera physalus Barents Sea Greenland Greenland Sea hyperoodon ampullatus Iceland Jan Mayen Jan Mayen Island Megaptera novaeangliae North Atlantic Northeast Atlantic Norwegian Sea Orca Orcinus orca Phocoena phocoena Physeter macrocephalus University of Tromsø: Septentrio Academic Publishing Barents Sea Greenland Jan Mayen Norwegian Sea NAMMCO Scientific Publications 11 |