Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea
Distribution and movement patterns of Antarctic blue whales Balaenoptera musculus intermedia at large temporal and spatial scales are still poorly understood. The objective of this study was to explore spatio-temporal distribution patterns of Antarctic blue whales in the Atlantic sector of the South...
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Online Access: | https://epic.awi.de/id/eprint/42568/ https://epic.awi.de/id/eprint/42568/2/Thomisch_etal_2016_ESR.pdf https://doi.org/10.3354/esr00739 https://hdl.handle.net/10013/epic.49188 https://hdl.handle.net/10013/epic.49188.d002 |
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ftawi:oai:epic.awi.de:42568 2024-09-15T17:41:09+00:00 Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea Thomisch, Karolin Boebel, Olaf Clark, CW Hagen, W Spiesecke, Stefanie Zitterbart, Daniel van Opzeeland, Ilse 2016-07-18 application/pdf https://epic.awi.de/id/eprint/42568/ https://epic.awi.de/id/eprint/42568/2/Thomisch_etal_2016_ESR.pdf https://doi.org/10.3354/esr00739 https://hdl.handle.net/10013/epic.49188 https://hdl.handle.net/10013/epic.49188.d002 unknown https://epic.awi.de/id/eprint/42568/2/Thomisch_etal_2016_ESR.pdf https://hdl.handle.net/10013/epic.49188.d002 Thomisch, K. orcid:0000-0002-7144-8369 , Boebel, O. orcid:0000-0002-2259-0035 , Clark, C. , Hagen, W. , Spiesecke, S. , Zitterbart, D. and van Opzeeland, I. (2016) Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea , Endangered Species Research, 30 , pp. 239-253 . doi:10.3354/esr00739 <https://doi.org/10.3354/esr00739> , hdl:10013/epic.49188 EPIC3Endangered Species Research, 30, pp. 239-253, ISSN: 1863-5407 Article isiRev 2016 ftawi https://doi.org/10.3354/esr00739 2024-06-24T04:15:36Z Distribution and movement patterns of Antarctic blue whales Balaenoptera musculus intermedia at large temporal and spatial scales are still poorly understood. The objective of this study was to explore spatio-temporal distribution patterns of Antarctic blue whales in the Atlantic sector of the Southern Ocean, using passive acoustic monitoring data. Multi-year data were collected between 2008 and 2013 by 11 recorders deployed in the Weddell Sea and along the Greenwich meridian. Antarctic blue whale Z-calls were detected via spectrogram cross-correlation. A Blue Whale Index was developed to quantify the proportion of time during which acoustic energy from Antarctic blue whales dominated over background noise. Our results show that Antarctic blue whales were acoustically present year-round, with most call detections between January and April. During austral summer, the number of detected calls peaked synchronously throughout the study area in most years, and hence, no directed meridional movement pattern was detectable. During austral winter, vocalizations were recorded at latitudes as high as 69°S, with sea ice cover exceeding 90%, suggesting that some Antarctic blue whales overwinter in Antarctic waters. Polynyas likely serve as an important habitat for baleen whales during austral winter, providing food and reliable access to open water for breathing. Overall, our results support increasing evidence of a complex and non-obligatory migratory behavior of Antarctic blue whales, potentially involving temporally and spatially dynamic migration routes and destinations, as well as variable timing of migration to and from the feeding grounds. Article in Journal/Newspaper Antarc* Antarctic Balaenoptera musculus baleen whales Blue whale Sea ice Southern Ocean Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Endangered Species Research 30 239 253 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Distribution and movement patterns of Antarctic blue whales Balaenoptera musculus intermedia at large temporal and spatial scales are still poorly understood. The objective of this study was to explore spatio-temporal distribution patterns of Antarctic blue whales in the Atlantic sector of the Southern Ocean, using passive acoustic monitoring data. Multi-year data were collected between 2008 and 2013 by 11 recorders deployed in the Weddell Sea and along the Greenwich meridian. Antarctic blue whale Z-calls were detected via spectrogram cross-correlation. A Blue Whale Index was developed to quantify the proportion of time during which acoustic energy from Antarctic blue whales dominated over background noise. Our results show that Antarctic blue whales were acoustically present year-round, with most call detections between January and April. During austral summer, the number of detected calls peaked synchronously throughout the study area in most years, and hence, no directed meridional movement pattern was detectable. During austral winter, vocalizations were recorded at latitudes as high as 69°S, with sea ice cover exceeding 90%, suggesting that some Antarctic blue whales overwinter in Antarctic waters. Polynyas likely serve as an important habitat for baleen whales during austral winter, providing food and reliable access to open water for breathing. Overall, our results support increasing evidence of a complex and non-obligatory migratory behavior of Antarctic blue whales, potentially involving temporally and spatially dynamic migration routes and destinations, as well as variable timing of migration to and from the feeding grounds. |
format |
Article in Journal/Newspaper |
author |
Thomisch, Karolin Boebel, Olaf Clark, CW Hagen, W Spiesecke, Stefanie Zitterbart, Daniel van Opzeeland, Ilse |
spellingShingle |
Thomisch, Karolin Boebel, Olaf Clark, CW Hagen, W Spiesecke, Stefanie Zitterbart, Daniel van Opzeeland, Ilse Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
author_facet |
Thomisch, Karolin Boebel, Olaf Clark, CW Hagen, W Spiesecke, Stefanie Zitterbart, Daniel van Opzeeland, Ilse |
author_sort |
Thomisch, Karolin |
title |
Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
title_short |
Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
title_full |
Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
title_fullStr |
Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
title_full_unstemmed |
Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea |
title_sort |
spatio-temporal patterns in acoustic presence and distribution of antarctic blue whales balaenoptera musculus intermedia in the weddell sea |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/42568/ https://epic.awi.de/id/eprint/42568/2/Thomisch_etal_2016_ESR.pdf https://doi.org/10.3354/esr00739 https://hdl.handle.net/10013/epic.49188 https://hdl.handle.net/10013/epic.49188.d002 |
genre |
Antarc* Antarctic Balaenoptera musculus baleen whales Blue whale Sea ice Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Balaenoptera musculus baleen whales Blue whale Sea ice Southern Ocean Weddell Sea |
op_source |
EPIC3Endangered Species Research, 30, pp. 239-253, ISSN: 1863-5407 |
op_relation |
https://epic.awi.de/id/eprint/42568/2/Thomisch_etal_2016_ESR.pdf https://hdl.handle.net/10013/epic.49188.d002 Thomisch, K. orcid:0000-0002-7144-8369 , Boebel, O. orcid:0000-0002-2259-0035 , Clark, C. , Hagen, W. , Spiesecke, S. , Zitterbart, D. and van Opzeeland, I. (2016) Spatio-temporal patterns in acoustic presence and distribution of Antarctic blue whales Balaenoptera musculus intermedia in the Weddell Sea , Endangered Species Research, 30 , pp. 239-253 . doi:10.3354/esr00739 <https://doi.org/10.3354/esr00739> , hdl:10013/epic.49188 |
op_doi |
https://doi.org/10.3354/esr00739 |
container_title |
Endangered Species Research |
container_volume |
30 |
container_start_page |
239 |
op_container_end_page |
253 |
_version_ |
1810487271277723648 |