Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring
Globally, the Indian Ocean appears to have the greatest blue whale (Balaenoptera musculus ssp) acoustic diversity, with at least four acoustic populations from three defined sub-species. To understand how these different populations use this region as habitat, we first need to characterize their spa...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://doi.org/10.1016/j.dsr2.2020.104874 https://archimer.ifremer.fr/doc/00649/76111/77071.pdf https://archimer.ifremer.fr/doc/00649/76111/ |
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fttriple:oai:gotriple.eu:10670/1.7vsf2v 2023-05-15T13:50:55+02:00 Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring Torterotot, Maëlle Samaran, Flore Stafford, Kathleen M. Royer, Jean-yves 2020-01-01 https://doi.org/10.1016/j.dsr2.2020.104874 https://archimer.ifremer.fr/doc/00649/76111/77071.pdf https://archimer.ifremer.fr/doc/00649/76111/ en eng Elsevier BV doi:10.1016/j.dsr2.2020.104874 10670/1.7vsf2v https://archimer.ifremer.fr/doc/00649/76111/77071.pdf https://archimer.ifremer.fr/doc/00649/76111/ Archimer, archive institutionnelle de l'Ifremer Deep-sea Research Part Ii-topical Studies In Oceanography (0967-0645) (Elsevier BV), 2020-09 , Vol. 179 , P. 104874 (16p.) geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2020 fttriple https://doi.org/10.1016/j.dsr2.2020.104874 2023-01-22T17:27:19Z Globally, the Indian Ocean appears to have the greatest blue whale (Balaenoptera musculus ssp) acoustic diversity, with at least four acoustic populations from three defined sub-species. To understand how these different populations use this region as habitat, we first need to characterize their spatial and seasonal distributions. Here, we build on previous passive acoustic monitoring studies and analyze a passive acoustic dataset spanning large temporal (9 years) and spatial (3 to 9 sites covering more than 12 million km2 of potential acoustic habitat in the southwest Indian Ocean) scales. A novel detection algorithm was employed to investigate the long-term presence of Antarctic blue whale and SEIO and SWIO pygmy blue whale calls. We found that Antarctic and pygmy blue whales have completely different spatial and seasonal distribution in the southern Indian Ocean. Antarctic blue whales are heard almost year-round on the whole array, with great inter-annual variability. The two pygmy blue whales share a highly stable seasonal acoustic presence, but their geographical distributions overlap at only a few central Indian Ocean sites. However, Antarctic and pygmy blue whale acoustic co-occurrence is common, especially in sub-tropical waters. These temporal and spatial distributions strengthen our understanding of seasonal occurrence and habitat use of distinct populations of blue whales in the southern Indian Ocean. A better comprehension of the ecology of Indian Ocean blue whales will require interdisciplinary studies to examine the drivers of the variability seen from passive acoustic studies. Text Antarc* Antarctic Balaenoptera musculus Blue whale Unknown Antarctic Indian Deep Sea Research Part II: Topical Studies in Oceanography 179 104874 |
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English |
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geo envir Torterotot, Maëlle Samaran, Flore Stafford, Kathleen M. Royer, Jean-yves Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
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description |
Globally, the Indian Ocean appears to have the greatest blue whale (Balaenoptera musculus ssp) acoustic diversity, with at least four acoustic populations from three defined sub-species. To understand how these different populations use this region as habitat, we first need to characterize their spatial and seasonal distributions. Here, we build on previous passive acoustic monitoring studies and analyze a passive acoustic dataset spanning large temporal (9 years) and spatial (3 to 9 sites covering more than 12 million km2 of potential acoustic habitat in the southwest Indian Ocean) scales. A novel detection algorithm was employed to investigate the long-term presence of Antarctic blue whale and SEIO and SWIO pygmy blue whale calls. We found that Antarctic and pygmy blue whales have completely different spatial and seasonal distribution in the southern Indian Ocean. Antarctic blue whales are heard almost year-round on the whole array, with great inter-annual variability. The two pygmy blue whales share a highly stable seasonal acoustic presence, but their geographical distributions overlap at only a few central Indian Ocean sites. However, Antarctic and pygmy blue whale acoustic co-occurrence is common, especially in sub-tropical waters. These temporal and spatial distributions strengthen our understanding of seasonal occurrence and habitat use of distinct populations of blue whales in the southern Indian Ocean. A better comprehension of the ecology of Indian Ocean blue whales will require interdisciplinary studies to examine the drivers of the variability seen from passive acoustic studies. |
format |
Text |
author |
Torterotot, Maëlle Samaran, Flore Stafford, Kathleen M. Royer, Jean-yves |
author_facet |
Torterotot, Maëlle Samaran, Flore Stafford, Kathleen M. Royer, Jean-yves |
author_sort |
Torterotot, Maëlle |
title |
Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
title_short |
Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
title_full |
Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
title_fullStr |
Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
title_full_unstemmed |
Distribution of blue whale populations in the southern Indian Ocean based on a decade of acoustic monitoring |
title_sort |
distribution of blue whale populations in the southern indian ocean based on a decade of acoustic monitoring |
publisher |
Elsevier BV |
publishDate |
2020 |
url |
https://doi.org/10.1016/j.dsr2.2020.104874 https://archimer.ifremer.fr/doc/00649/76111/77071.pdf https://archimer.ifremer.fr/doc/00649/76111/ |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic Balaenoptera musculus Blue whale |
genre_facet |
Antarc* Antarctic Balaenoptera musculus Blue whale |
op_source |
Archimer, archive institutionnelle de l'Ifremer Deep-sea Research Part Ii-topical Studies In Oceanography (0967-0645) (Elsevier BV), 2020-09 , Vol. 179 , P. 104874 (16p.) |
op_relation |
doi:10.1016/j.dsr2.2020.104874 10670/1.7vsf2v https://archimer.ifremer.fr/doc/00649/76111/77071.pdf https://archimer.ifremer.fr/doc/00649/76111/ |
op_doi |
https://doi.org/10.1016/j.dsr2.2020.104874 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
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179 |
container_start_page |
104874 |
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1766254295970217984 |