Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys
Beginning in 1986, 7 aerial surveys covering the coastal waters of Iceland have been conducted up to 2016. In addition, several partial surveys covering portions of the same area and at different times of the year have been flown in the same 30 year time span. We present previously unpublished abund...
Published in: | NAMMCO Scientific Publications |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Septentrio Academic Publishing
2020
|
Subjects: | |
Online Access: | https://doi.org/10.7557/3.4805 https://doaj.org/article/15e586c6070444789cdbf5b5e91c5b72 |
id |
ftdoajarticles:oai:doaj.org/article:15e586c6070444789cdbf5b5e91c5b72 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:15e586c6070444789cdbf5b5e91c5b72 2023-05-15T15:36:08+02:00 Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys Daniel Pike Thorvaldur Gunnlaugsson Johann Sigurjonsson Gisli Vikingsson 2020-05-01T00:00:00Z https://doi.org/10.7557/3.4805 https://doaj.org/article/15e586c6070444789cdbf5b5e91c5b72 EN eng Septentrio Academic Publishing https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4805 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 doi:10.7557/3.4805 1560-2206 2309-2491 https://doaj.org/article/15e586c6070444789cdbf5b5e91c5b72 NAMMCO Scientific Publications, Vol 11 (2020) abundance Iceland aerial survey population trend common minke whale humpback whale Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.7557/3.4805 2022-12-31T01:09:40Z Beginning in 1986, 7 aerial surveys covering the coastal waters of Iceland have been conducted up to 2016. In addition, several partial surveys covering portions of the same area and at different times of the year have been flown in the same 30 year time span. We present previously unpublished abundance estimates, corrected to the extent feasible for known biases, for common minke whales (Balaenoptera acutorostrata), humpback whales (Megaptera novaeangliae), white-beaked dolphins (Lagenorhynchus albirostris) and harbour porpoises (Phocoena phocoena) from some or all of the 2007, 2009 and 2016 surveys. The relative abundance of most species was comparatively low in the spring and fall, and peaked June and July when all of the main surveys have been carried out. An analysis of changes in line transect density as an index of relative abundance from all surveys indicates that common minke whale abundance decreased by 75% after 2001 and has remained at a relatively low level since then. Relative abundance of humpback whales and white-beaked dolphins has increased over the period 1986-2016. We place these observed changes in context with oceanographic and ecosystem changes documented over the same period. Article in Journal/Newspaper Balaenoptera acutorostrata Humpback Whale Iceland Lagenorhynchus albirostris Megaptera novaeangliae minke whale Phocoena phocoena Directory of Open Access Journals: DOAJ Articles NAMMCO Scientific Publications 11 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
abundance Iceland aerial survey population trend common minke whale humpback whale Ecology QH540-549.5 |
spellingShingle |
abundance Iceland aerial survey population trend common minke whale humpback whale Ecology QH540-549.5 Daniel Pike Thorvaldur Gunnlaugsson Johann Sigurjonsson Gisli Vikingsson Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
topic_facet |
abundance Iceland aerial survey population trend common minke whale humpback whale Ecology QH540-549.5 |
description |
Beginning in 1986, 7 aerial surveys covering the coastal waters of Iceland have been conducted up to 2016. In addition, several partial surveys covering portions of the same area and at different times of the year have been flown in the same 30 year time span. We present previously unpublished abundance estimates, corrected to the extent feasible for known biases, for common minke whales (Balaenoptera acutorostrata), humpback whales (Megaptera novaeangliae), white-beaked dolphins (Lagenorhynchus albirostris) and harbour porpoises (Phocoena phocoena) from some or all of the 2007, 2009 and 2016 surveys. The relative abundance of most species was comparatively low in the spring and fall, and peaked June and July when all of the main surveys have been carried out. An analysis of changes in line transect density as an index of relative abundance from all surveys indicates that common minke whale abundance decreased by 75% after 2001 and has remained at a relatively low level since then. Relative abundance of humpback whales and white-beaked dolphins has increased over the period 1986-2016. We place these observed changes in context with oceanographic and ecosystem changes documented over the same period. |
format |
Article in Journal/Newspaper |
author |
Daniel Pike Thorvaldur Gunnlaugsson Johann Sigurjonsson Gisli Vikingsson |
author_facet |
Daniel Pike Thorvaldur Gunnlaugsson Johann Sigurjonsson Gisli Vikingsson |
author_sort |
Daniel Pike |
title |
Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
title_short |
Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
title_full |
Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
title_fullStr |
Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
title_full_unstemmed |
Distribution and Abundance of Cetaceans in Icelandic Waters over 30 Years of Aerial Surveys |
title_sort |
distribution and abundance of cetaceans in icelandic waters over 30 years of aerial surveys |
publisher |
Septentrio Academic Publishing |
publishDate |
2020 |
url |
https://doi.org/10.7557/3.4805 https://doaj.org/article/15e586c6070444789cdbf5b5e91c5b72 |
genre |
Balaenoptera acutorostrata Humpback Whale Iceland Lagenorhynchus albirostris Megaptera novaeangliae minke whale Phocoena phocoena |
genre_facet |
Balaenoptera acutorostrata Humpback Whale Iceland Lagenorhynchus albirostris Megaptera novaeangliae minke whale Phocoena phocoena |
op_source |
NAMMCO Scientific Publications, Vol 11 (2020) |
op_relation |
https://septentrio.uit.no/index.php/NAMMCOSP/article/view/4805 https://doaj.org/toc/1560-2206 https://doaj.org/toc/2309-2491 doi:10.7557/3.4805 1560-2206 2309-2491 https://doaj.org/article/15e586c6070444789cdbf5b5e91c5b72 |
op_doi |
https://doi.org/10.7557/3.4805 |
container_title |
NAMMCO Scientific Publications |
container_volume |
11 |
_version_ |
1766366478612824064 |