Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean
For effective species management, understanding population structure and distribution is critical. However, quantifying population structure is not always straightforward. Within the Southern Hemisphere, the blue whale (Balaenoptera musculus) complex is extremely diverse but difficult to study. Usin...
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ftoregonstate:ir.library.oregonstate.edu:qv33rz606 2024-04-14T08:09:29+00:00 Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean Balcazar, Naysa E. Tripovich, Joy S. Klinck, Holger Nieukirk, Sharon L. Mellinger, David K. Dziak, Robert P. Rogers, Tracey L. https://ir.library.oregonstate.edu/concern/articles/qv33rz606 English [eng] eng unknown Oxford University Press https://ir.library.oregonstate.edu/concern/articles/qv33rz606 Copyright Not Evaluated Article ftoregonstate 2024-03-21T15:49:52Z For effective species management, understanding population structure and distribution is critical. However, quantifying population structure is not always straightforward. Within the Southern Hemisphere, the blue whale (Balaenoptera musculus) complex is extremely diverse but difficult to study. Using automated detector methods, we identified “acoustic populations” of whales producing region-specific call types. We examined blue whale call types in passive acoustic data at sites spanning over 7,370 km across the southeast Indian Ocean and southwest Pacific Ocean (SWPO) from 2009 to 2012. In the absence of genetic resolution, these acoustic populations offer unique information about the blue whale population complex. We found that the Australian continent acts as a geographic boundary, separating Australia and New Zealand blue whale acoustic populations at the junction of the Indian and Pacific Ocean basins. We located blue whales in previously undocumented locations, including the far SWPO, in the Tasman Sea off the east coast of Australia, and along the Lau Basin near Tonga. Our understanding of population dynamics across this broad scale has significant implications to recovery and conservation management for this endangered species, at a regional and global scale. Keywords: vocalization, pygmy blue whale, bioacoustics, Lau Basin, New Zealand, passive acoustic monitoring, marine mammal, Australia Article in Journal/Newspaper Balaenoptera musculus Blue whale ScholarsArchive@OSU (Oregon State University) Pacific Indian New Zealand Tonga ENVELOPE(7.990,7.990,63.065,63.065) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
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English unknown |
description |
For effective species management, understanding population structure and distribution is critical. However, quantifying population structure is not always straightforward. Within the Southern Hemisphere, the blue whale (Balaenoptera musculus) complex is extremely diverse but difficult to study. Using automated detector methods, we identified “acoustic populations” of whales producing region-specific call types. We examined blue whale call types in passive acoustic data at sites spanning over 7,370 km across the southeast Indian Ocean and southwest Pacific Ocean (SWPO) from 2009 to 2012. In the absence of genetic resolution, these acoustic populations offer unique information about the blue whale population complex. We found that the Australian continent acts as a geographic boundary, separating Australia and New Zealand blue whale acoustic populations at the junction of the Indian and Pacific Ocean basins. We located blue whales in previously undocumented locations, including the far SWPO, in the Tasman Sea off the east coast of Australia, and along the Lau Basin near Tonga. Our understanding of population dynamics across this broad scale has significant implications to recovery and conservation management for this endangered species, at a regional and global scale. Keywords: vocalization, pygmy blue whale, bioacoustics, Lau Basin, New Zealand, passive acoustic monitoring, marine mammal, Australia |
format |
Article in Journal/Newspaper |
author |
Balcazar, Naysa E. Tripovich, Joy S. Klinck, Holger Nieukirk, Sharon L. Mellinger, David K. Dziak, Robert P. Rogers, Tracey L. |
spellingShingle |
Balcazar, Naysa E. Tripovich, Joy S. Klinck, Holger Nieukirk, Sharon L. Mellinger, David K. Dziak, Robert P. Rogers, Tracey L. Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
author_facet |
Balcazar, Naysa E. Tripovich, Joy S. Klinck, Holger Nieukirk, Sharon L. Mellinger, David K. Dziak, Robert P. Rogers, Tracey L. |
author_sort |
Balcazar, Naysa E. |
title |
Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
title_short |
Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
title_full |
Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
title_fullStr |
Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
title_full_unstemmed |
Calls reveal population structure of blue whales across the southeast Indian Ocean and the southwest Pacific Ocean |
title_sort |
calls reveal population structure of blue whales across the southeast indian ocean and the southwest pacific ocean |
publisher |
Oxford University Press |
url |
https://ir.library.oregonstate.edu/concern/articles/qv33rz606 |
long_lat |
ENVELOPE(7.990,7.990,63.065,63.065) |
geographic |
Pacific Indian New Zealand Tonga |
geographic_facet |
Pacific Indian New Zealand Tonga |
genre |
Balaenoptera musculus Blue whale |
genre_facet |
Balaenoptera musculus Blue whale |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/qv33rz606 |
op_rights |
Copyright Not Evaluated |
_version_ |
1796306968637341696 |