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...
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Format: | Text |
Language: | English |
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2007
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Online Access: | https://www.documentation.ird.fr/hor/fdi:010040640 |
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ftird:oai:ird.fr:fdi:010040640 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
Antarctic blue whales Balaenoptera musculus brevicauda Balaenoptera musculus indica Balaenoptera musculus intermedia distribution pygmy blue whales true blue whales whaling |
spellingShingle |
Antarctic blue whales Balaenoptera musculus brevicauda Balaenoptera musculus indica Balaenoptera musculus intermedia distribution pygmy blue whales true blue whales whaling Branch, T. A. Stafford, K. M. Palacios, D. M. Allison, C. Bannister, J. L. Burton, C. L. K. Cabrera, E. Carlson, C. A. Vernazzani, B. G. Gill, P. C. Hucke Gaete, R. Jenner, K. C. S. Jenner, M. N. M. Matsuoka, K. Mikhalev, Y. A. Miyashita, T. Morrice, M. G. Nishiwaki, S. Sturrock, V. J. Tormosov, D. Anderson, R. C. Baker, A. N. Best, P. B. /Borsa, Philippe Brownell, R. L. Childerhouse, S. Findlay, K. P. Gerrodette, T. Ilangakoon, A. D. Joergensen, M. Kahn, B. Ljungblad, D. K. Maughan, B. McCauley, R. D. McKay, S. Norris, T. F. Whale, O. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. M. Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean |
topic_facet |
Antarctic blue whales Balaenoptera musculus brevicauda Balaenoptera musculus indica Balaenoptera musculus intermedia distribution pygmy blue whales true blue whales whaling |
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 blue whales. 6. South-east Pacific blue whales have a discrete distribution and high sighting rates compared with the Antarctic. Further work is needed to clarify their subspecific status given their distinctive genetics, acoustics and ... |
format |
Text |
author |
Branch, T. A. Stafford, K. M. Palacios, D. M. Allison, C. Bannister, J. L. Burton, C. L. K. Cabrera, E. Carlson, C. A. Vernazzani, B. G. Gill, P. C. Hucke Gaete, R. Jenner, K. C. S. Jenner, M. N. M. Matsuoka, K. Mikhalev, Y. A. Miyashita, T. Morrice, M. G. Nishiwaki, S. Sturrock, V. J. Tormosov, D. Anderson, R. C. Baker, A. N. Best, P. B. /Borsa, Philippe Brownell, R. L. Childerhouse, S. Findlay, K. P. Gerrodette, T. Ilangakoon, A. D. Joergensen, M. Kahn, B. Ljungblad, D. K. Maughan, B. McCauley, R. D. McKay, S. Norris, T. F. Whale, O. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. M. |
author_facet |
Branch, T. A. Stafford, K. M. Palacios, D. M. Allison, C. Bannister, J. L. Burton, C. L. K. Cabrera, E. Carlson, C. A. Vernazzani, B. G. Gill, P. C. Hucke Gaete, R. Jenner, K. C. S. Jenner, M. N. M. Matsuoka, K. Mikhalev, Y. A. Miyashita, T. Morrice, M. G. Nishiwaki, S. Sturrock, V. J. Tormosov, D. Anderson, R. C. Baker, A. N. Best, P. B. /Borsa, Philippe Brownell, R. L. Childerhouse, S. Findlay, K. P. Gerrodette, T. Ilangakoon, A. D. Joergensen, M. Kahn, B. Ljungblad, D. K. Maughan, B. McCauley, R. D. McKay, S. Norris, T. F. Whale, O. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. M. |
author_sort |
Branch, T. A. |
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 |
publishDate |
2007 |
url |
https://www.documentation.ird.fr/hor/fdi:010040640 |
genre |
Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010040640 oai:ird.fr:fdi:010040640 Branch T. A., Stafford K. M., Palacios D. M., Allison C., Bannister J. L., Burton C. L. K., Cabrera E., Carlson C. A., Vernazzani B. G., Gill P. C., Hucke Gaete R., Jenner K. C. S., Jenner M. N. M., Matsuoka K., Mikhalev Y. A., Miyashita T., Morrice M. G., Nishiwaki S., Sturrock V. J., Tormosov D., Anderson R. C., Baker A. N., Best P. B., Borsa Philippe, Brownell R. L., Childerhouse S., Findlay K. P., Gerrodette T., Ilangakoon A. D., Joergensen M., Kahn B., Ljungblad D. K., Maughan B., McCauley R. D., McKay S., Norris T. F., Whale O., Rankin S., Samaran F., Thiele D., Van Waerebeek K., Warneke R. M. Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean. 2007, 37 (2), p. 116-175 |
_version_ |
1810494949607604224 |
spelling |
ftird:oai:ird.fr:fdi:010040640 2024-09-15T17:46:38+00:00 Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean Branch, T. A. Stafford, K. M. Palacios, D. M. Allison, C. Bannister, J. L. Burton, C. L. K. Cabrera, E. Carlson, C. A. Vernazzani, B. G. Gill, P. C. Hucke Gaete, R. Jenner, K. C. S. Jenner, M. N. M. Matsuoka, K. Mikhalev, Y. A. Miyashita, T. Morrice, M. G. Nishiwaki, S. Sturrock, V. J. Tormosov, D. Anderson, R. C. Baker, A. N. Best, P. B. /Borsa, Philippe Brownell, R. L. Childerhouse, S. Findlay, K. P. Gerrodette, T. Ilangakoon, A. D. Joergensen, M. Kahn, B. Ljungblad, D. K. Maughan, B. McCauley, R. D. McKay, S. Norris, T. F. Whale, O. Rankin, S. Samaran, F. Thiele, D. Van Waerebeek, K. Warneke, R. M. 2007 https://www.documentation.ird.fr/hor/fdi:010040640 EN eng https://www.documentation.ird.fr/hor/fdi:010040640 oai:ird.fr:fdi:010040640 Branch T. A., Stafford K. M., Palacios D. M., Allison C., Bannister J. L., Burton C. L. K., Cabrera E., Carlson C. A., Vernazzani B. G., Gill P. C., Hucke Gaete R., Jenner K. C. S., Jenner M. N. M., Matsuoka K., Mikhalev Y. A., Miyashita T., Morrice M. G., Nishiwaki S., Sturrock V. J., Tormosov D., Anderson R. C., Baker A. N., Best P. B., Borsa Philippe, Brownell R. L., Childerhouse S., Findlay K. P., Gerrodette T., Ilangakoon A. D., Joergensen M., Kahn B., Ljungblad D. K., Maughan B., McCauley R. D., McKay S., Norris T. F., Whale O., Rankin S., Samaran F., Thiele D., Van Waerebeek K., Warneke R. M. Past and present distribution, densities and movements of blue whales Balaenoptera musculus in the Southern Hemisphere and northern Indian Ocean. 2007, 37 (2), p. 116-175 Antarctic blue whales Balaenoptera musculus brevicauda Balaenoptera musculus indica Balaenoptera musculus intermedia distribution pygmy blue whales true blue whales whaling text 2007 ftird 2024-08-15T05:57:42Z 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 blue whales. 6. South-east Pacific blue whales have a discrete distribution and high sighting rates compared with the Antarctic. Further work is needed to clarify their subspecific status given their distinctive genetics, acoustics and ... Text Antarc* Antarctic Antarctica Balaenoptera musculus Blue whale IRD (Institute de recherche pour le développement): Horizon |