Georgia blue whales five decades after the end of whaling
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A.,...
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Online Access: | https://hdl.handle.net/1912/26963 |
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/26963 2023-05-15T13:48:31+02:00 Georgia blue whales five decades after the end of whaling Calderan, Susannah Black, Andy Branch, Trevor A. Collins, Martin A. Kelly, Natalie Leaper, Russell Lurcock, Sarah Miller, Brian S. Moore, Michael J. Olson, Paula A. Širović, Ana Wood, Andrew G. Jackson, Jennifer A. 2020-11-19 https://hdl.handle.net/1912/26963 unknown Inter Research https://doi.org/10.3354/esr01077 Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. (2020). South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, 359-373. https://hdl.handle.net/1912/26963 doi:10.3354/esr01077 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. (2020). South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, 359-373. doi:10.3354/esr01077 Blue whale Balaenoptera musculus South Georgia Recovery Whaling Southern Ocean Article 2020 ftwhoas https://doi.org/10.3354/esr01077 2022-05-28T23:04:06Z © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, (2020): 359-373, https://doi.org/10.3354/esr01077. Blue whales Balaenoptera musculus at South Georgia were heavily exploited during 20th century industrial whaling, to the point of local near-extirpation. Although legal whaling for blue whales ceased in the 1960s, and there were indications of blue whale recovery across the wider Southern Ocean area, blue whales were seldom seen in South Georgia waters in subsequent years. We collated 30 yr of data comprising opportunistic sightings, systematic visual and acoustic surveys and photo-identification to assess the current distribution of blue whales in the waters surrounding South Georgia. Over 34000 km of systematic survey data between 1998 and 2018 resulted in only a single blue whale sighting, although opportunistic sightings were reported over that time period. However, since 2018 there have been increases in both sightings of blue whales and detections of their vocalisations. A survey in 2020 comprising visual line transect surveys and directional frequency analysis and recording (DIFAR) sonobuoy deployments resulted in 58 blue whale sightings from 2430 km of visual effort, including the photo-identification of 23 individual blue whales. Blue whale vocalisations were detected on all 31 sonobuoys deployed (114 h). In total, 41 blue whales were photo-identified from South Georgia between 2011 and 2020, none of which matched the 517 whales in the current Antarctic catalogue. These recent data suggest that blue whales have started to return to South Georgia waters, but continued visual and acoustic surveys are required to monitor any ... Article in Journal/Newspaper Antarc* Antarctic Balaenoptera musculus Blue whale Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Antarctic Southern Ocean Endangered Species Research 43 359 373 |
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Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Blue whale Balaenoptera musculus South Georgia Recovery Whaling Southern Ocean |
spellingShingle |
Blue whale Balaenoptera musculus South Georgia Recovery Whaling Southern Ocean Calderan, Susannah Black, Andy Branch, Trevor A. Collins, Martin A. Kelly, Natalie Leaper, Russell Lurcock, Sarah Miller, Brian S. Moore, Michael J. Olson, Paula A. Širović, Ana Wood, Andrew G. Jackson, Jennifer A. Georgia blue whales five decades after the end of whaling |
topic_facet |
Blue whale Balaenoptera musculus South Georgia Recovery Whaling Southern Ocean |
description |
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, (2020): 359-373, https://doi.org/10.3354/esr01077. Blue whales Balaenoptera musculus at South Georgia were heavily exploited during 20th century industrial whaling, to the point of local near-extirpation. Although legal whaling for blue whales ceased in the 1960s, and there were indications of blue whale recovery across the wider Southern Ocean area, blue whales were seldom seen in South Georgia waters in subsequent years. We collated 30 yr of data comprising opportunistic sightings, systematic visual and acoustic surveys and photo-identification to assess the current distribution of blue whales in the waters surrounding South Georgia. Over 34000 km of systematic survey data between 1998 and 2018 resulted in only a single blue whale sighting, although opportunistic sightings were reported over that time period. However, since 2018 there have been increases in both sightings of blue whales and detections of their vocalisations. A survey in 2020 comprising visual line transect surveys and directional frequency analysis and recording (DIFAR) sonobuoy deployments resulted in 58 blue whale sightings from 2430 km of visual effort, including the photo-identification of 23 individual blue whales. Blue whale vocalisations were detected on all 31 sonobuoys deployed (114 h). In total, 41 blue whales were photo-identified from South Georgia between 2011 and 2020, none of which matched the 517 whales in the current Antarctic catalogue. These recent data suggest that blue whales have started to return to South Georgia waters, but continued visual and acoustic surveys are required to monitor any ... |
format |
Article in Journal/Newspaper |
author |
Calderan, Susannah Black, Andy Branch, Trevor A. Collins, Martin A. Kelly, Natalie Leaper, Russell Lurcock, Sarah Miller, Brian S. Moore, Michael J. Olson, Paula A. Širović, Ana Wood, Andrew G. Jackson, Jennifer A. |
author_facet |
Calderan, Susannah Black, Andy Branch, Trevor A. Collins, Martin A. Kelly, Natalie Leaper, Russell Lurcock, Sarah Miller, Brian S. Moore, Michael J. Olson, Paula A. Širović, Ana Wood, Andrew G. Jackson, Jennifer A. |
author_sort |
Calderan, Susannah |
title |
Georgia blue whales five decades after the end of whaling |
title_short |
Georgia blue whales five decades after the end of whaling |
title_full |
Georgia blue whales five decades after the end of whaling |
title_fullStr |
Georgia blue whales five decades after the end of whaling |
title_full_unstemmed |
Georgia blue whales five decades after the end of whaling |
title_sort |
georgia blue whales five decades after the end of whaling |
publisher |
Inter Research |
publishDate |
2020 |
url |
https://hdl.handle.net/1912/26963 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Balaenoptera musculus Blue whale Southern Ocean |
genre_facet |
Antarc* Antarctic Balaenoptera musculus Blue whale Southern Ocean |
op_source |
Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. (2020). South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, 359-373. doi:10.3354/esr01077 |
op_relation |
https://doi.org/10.3354/esr01077 Calderan, S., V., Black, A., Branch, T. A., Collins, M. A., Kelly, N., Leaper, R., Lurcock, S., Miller, B. S., Moore, M., Olson, P. A., Sirovic, A., Wood, A. G., & Jackson, J. A. (2020). South Georgia blue whales five decades after the end of whaling. Endangered Species Research, 43, 359-373. https://hdl.handle.net/1912/26963 doi:10.3354/esr01077 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3354/esr01077 |
container_title |
Endangered Species Research |
container_volume |
43 |
container_start_page |
359 |
op_container_end_page |
373 |
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1766249373302259712 |