Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean
1. Blue whale locations in the Southern Hemisphere and northern Indian Ocean were obtained from catches (303 239), sightings (4383 records of 8058 whales), strandings (103), Discovery marks (2191) and recoveries (95), and acoustic recordings. 2. Sighting surveys included 7 480 450 km of effort plus...
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The Mammal Society
2007
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Online Access: | https://hdl.handle.net/20.500.11937/32692 https://doi.org/10.1111/j.1365-2907.2007.00106.x |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/32692 2023-06-11T04:05:41+02:00 Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean Branch, T. Stafford, K. Palacios, D. Allison, C. Bannister, J. Burton, C. Cabrera, E. Carlson, C. Galletti Vernazzani, B. Gill, P. Hucke-Gaete, R. Jenner, K. Jenner, M. Matsuoka, K. Mikhalev, Y. Miyashita, T. Morrice, M. Nishiwaki, S. Sturrock, V. Tormosov, D. Anderson, R. Baker, A. Best, P. Borsa, P. Brownell, R. Childerhouse, S. Findlay, K. Gerrodette, T. Ilangakoon, A. Joergensen, M. Kahn, B. Ljungblad, D. Maughan, B. McCauley, Robert Mckay, S. Norris, T. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. 2007 unknown https://hdl.handle.net/20.500.11937/32692 https://doi.org/10.1111/j.1365-2907.2007.00106.x unknown The Mammal Society http://hdl.handle.net/20.500.11937/32692 doi:10.1111/j.1365-2907.2007.00106.x Journal Article 2007 ftcurtin https://doi.org/20.500.11937/3269210.1111/j.1365-2907.2007.00106.x 2023-05-30T19:37:15Z 1. Blue whale locations in the Southern Hemisphere and northern Indian Ocean were obtained from catches (303 239), sightings (4383 records of 8058 whales), strandings (103), Discovery marks (2191) and recoveries (95), and acoustic recordings. 2. Sighting surveys included 7 480 450 km of effort plus 14 676 days with unmeasured effort. Groups usually consisted of solitary whales (65.2%) or pairs (24.6%); larger feeding aggregations of unassociated individuals were only rarely observed. Sighting rates (groups per 1000 km from many platform types) varied by four orders of magnitude and were lowest in the waters of Brazil, South Africa, the eastern tropical Pacific, Antarctica and South Georgia; higher in the Subantarctic and Peru; and highest around Indonesia, Sri Lanka, Chile, southern Australia and south of Madagascar. 3. Blue whales avoid the oligotrophic central gyres of the Indian, Pacific and Atlantic Oceans, but are more common where phytoplankton densities are high, and where there are dynamic oceanographic processes like upwelling and frontal meandering. 4. Compared with historical catches, the Antarctic ("true") subspecies is exceedingly rare and usually concentrated closer to the summer pack ice. In summer they are found throughout the Antarctic; in winter they migrate to southern Africa (although recent sightings there are rare) and to other northerly locations (based on acoustics), although some overwinter in the Antarctic. 5. Pygmy blue whales are found around the Indian Ocean and from southern Australia to New Zealand. At least four groupings are evident: northern Indian Ocean, from Madagascar to the Subantarctic, Indonesia to western and southern Australia, and from New Zealand northwards to the equator. Sighting rates are typically much higher than for Antarctic bluewhales. Article in Journal/Newspaper Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale Curtin University: espace Antarctic Indian New Zealand Pacific The Antarctic Mammal Review 37 2 116 175 |
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Open Polar |
collection |
Curtin University: espace |
op_collection_id |
ftcurtin |
language |
unknown |
description |
1. Blue whale locations in the Southern Hemisphere and northern Indian Ocean were obtained from catches (303 239), sightings (4383 records of 8058 whales), strandings (103), Discovery marks (2191) and recoveries (95), and acoustic recordings. 2. Sighting surveys included 7 480 450 km of effort plus 14 676 days with unmeasured effort. Groups usually consisted of solitary whales (65.2%) or pairs (24.6%); larger feeding aggregations of unassociated individuals were only rarely observed. Sighting rates (groups per 1000 km from many platform types) varied by four orders of magnitude and were lowest in the waters of Brazil, South Africa, the eastern tropical Pacific, Antarctica and South Georgia; higher in the Subantarctic and Peru; and highest around Indonesia, Sri Lanka, Chile, southern Australia and south of Madagascar. 3. Blue whales avoid the oligotrophic central gyres of the Indian, Pacific and Atlantic Oceans, but are more common where phytoplankton densities are high, and where there are dynamic oceanographic processes like upwelling and frontal meandering. 4. Compared with historical catches, the Antarctic ("true") subspecies is exceedingly rare and usually concentrated closer to the summer pack ice. In summer they are found throughout the Antarctic; in winter they migrate to southern Africa (although recent sightings there are rare) and to other northerly locations (based on acoustics), although some overwinter in the Antarctic. 5. Pygmy blue whales are found around the Indian Ocean and from southern Australia to New Zealand. At least four groupings are evident: northern Indian Ocean, from Madagascar to the Subantarctic, Indonesia to western and southern Australia, and from New Zealand northwards to the equator. Sighting rates are typically much higher than for Antarctic bluewhales. |
format |
Article in Journal/Newspaper |
author |
Branch, T. Stafford, K. Palacios, D. Allison, C. Bannister, J. Burton, C. Cabrera, E. Carlson, C. Galletti Vernazzani, B. Gill, P. Hucke-Gaete, R. Jenner, K. Jenner, M. Matsuoka, K. Mikhalev, Y. Miyashita, T. Morrice, M. Nishiwaki, S. Sturrock, V. Tormosov, D. Anderson, R. Baker, A. Best, P. Borsa, P. Brownell, R. Childerhouse, S. Findlay, K. Gerrodette, T. Ilangakoon, A. Joergensen, M. Kahn, B. Ljungblad, D. Maughan, B. McCauley, Robert Mckay, S. Norris, T. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. |
spellingShingle |
Branch, T. Stafford, K. Palacios, D. Allison, C. Bannister, J. Burton, C. Cabrera, E. Carlson, C. Galletti Vernazzani, B. Gill, P. Hucke-Gaete, R. Jenner, K. Jenner, M. Matsuoka, K. Mikhalev, Y. Miyashita, T. Morrice, M. Nishiwaki, S. Sturrock, V. Tormosov, D. Anderson, R. Baker, A. Best, P. Borsa, P. Brownell, R. Childerhouse, S. Findlay, K. Gerrodette, T. Ilangakoon, A. Joergensen, M. Kahn, B. Ljungblad, D. Maughan, B. McCauley, Robert Mckay, S. Norris, T. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
author_facet |
Branch, T. Stafford, K. Palacios, D. Allison, C. Bannister, J. Burton, C. Cabrera, E. Carlson, C. Galletti Vernazzani, B. Gill, P. Hucke-Gaete, R. Jenner, K. Jenner, M. Matsuoka, K. Mikhalev, Y. Miyashita, T. Morrice, M. Nishiwaki, S. Sturrock, V. Tormosov, D. Anderson, R. Baker, A. Best, P. Borsa, P. Brownell, R. Childerhouse, S. Findlay, K. Gerrodette, T. Ilangakoon, A. Joergensen, M. Kahn, B. Ljungblad, D. Maughan, B. McCauley, Robert Mckay, S. Norris, T. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. |
author_sort |
Branch, T. |
title |
Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
title_short |
Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
title_full |
Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
title_fullStr |
Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
title_full_unstemmed |
Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
title_sort |
past and present distribution, densities and movements of blue whales balaenoptera musculus in the southern hemisphere and northern indian ocean |
publisher |
The Mammal Society |
publishDate |
2007 |
url |
https://hdl.handle.net/20.500.11937/32692 https://doi.org/10.1111/j.1365-2907.2007.00106.x |
geographic |
Antarctic Indian New Zealand Pacific The Antarctic |
geographic_facet |
Antarctic Indian New Zealand Pacific The Antarctic |
genre |
Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale |
op_relation |
http://hdl.handle.net/20.500.11937/32692 doi:10.1111/j.1365-2907.2007.00106.x |
op_doi |
https://doi.org/20.500.11937/3269210.1111/j.1365-2907.2007.00106.x |
container_title |
Mammal Review |
container_volume |
37 |
container_issue |
2 |
container_start_page |
116 |
op_container_end_page |
175 |
_version_ |
1768377267330744320 |