Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia
The northern Chilean Patagonia region is a key feeding ground and a nursing habitat in the southern hemisphere for blue whales (Balaenoptera musculus). From 2014 to 2019, during 6 separate research cruises, the dive behavior of 28 individual blue whales was investigated using bio‐logging tags (DTAGs...
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ftpubmed:oai:pubmedcentral.nih.gov:9290343 2023-05-15T15:36:20+02:00 Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia CARUSO, Francesco HICKMOTT, Leigh WARREN, Joseph D. SEGRE, Paolo CHIANG, Gustavo BAHAMONDE, Paulina ESPAÑOL‐JIMÉNEZ, Sonia LI, Songhai BOCCONCELLI, Alessandro 2020-11-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9290343/ http://www.ncbi.nlm.nih.gov/pubmed/33166068 https://doi.org/10.1111/1749-4877.12501 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9290343/ http://www.ncbi.nlm.nih.gov/pubmed/33166068 http://dx.doi.org/10.1111/1749-4877.12501 © 2020 The Authors. Integrative Zoology published by International Society of Zoological Sciences, Institute of Zoology/Chinese Academy of Sciences and John Wiley & Sons Australia, Ltd https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. CC-BY-NC-ND Integr Zool Original Articles Text 2020 ftpubmed https://doi.org/10.1111/1749-4877.12501 2022-07-31T01:54:45Z The northern Chilean Patagonia region is a key feeding ground and a nursing habitat in the southern hemisphere for blue whales (Balaenoptera musculus). From 2014 to 2019, during 6 separate research cruises, the dive behavior of 28 individual blue whales was investigated using bio‐logging tags (DTAGs), generating ≈190 h of data. Whales dove to significantly greater depths during the day compared to nighttime (day: 32.6 ± 18.7 m; night: 6.2 ± 2.7 m; P < 0.01). During the night, most time was spent close to the surface (86% ± 9.4%; P < 0.01) and at depths of less than 12 m. From 2016 to 2019, active acoustics (scientific echosounders) were used to record prey (euphausiids) density and distribution simultaneously with whale diving data. Tagged whales appeared to perform dives relative to the vertical migration of prey during the day. The association between diurnal prey migration and shallow nighttime dive behavior suggests that blue whales are at increased risk of ship collisions during periods of darkness since the estimated maximum ship draft of vessels operating in the region is also ≈12 m. In recent decades, northern Chilean Patagonia has seen a large increase in marine traffic due to a boom in salmon aquaculture and the passenger ship industry. Vessel strike risks for large whales are likely underestimated in this region. Results reported in this study may be valuable for policy and mitigation decisions regarding conservation of the endangered blue whale. Text Balaenoptera musculus Blue whale PubMed Central (PMC) Patagonia Integrative Zoology 16 4 594 611 |
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Original Articles CARUSO, Francesco HICKMOTT, Leigh WARREN, Joseph D. SEGRE, Paolo CHIANG, Gustavo BAHAMONDE, Paulina ESPAÑOL‐JIMÉNEZ, Sonia LI, Songhai BOCCONCELLI, Alessandro Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
topic_facet |
Original Articles |
description |
The northern Chilean Patagonia region is a key feeding ground and a nursing habitat in the southern hemisphere for blue whales (Balaenoptera musculus). From 2014 to 2019, during 6 separate research cruises, the dive behavior of 28 individual blue whales was investigated using bio‐logging tags (DTAGs), generating ≈190 h of data. Whales dove to significantly greater depths during the day compared to nighttime (day: 32.6 ± 18.7 m; night: 6.2 ± 2.7 m; P < 0.01). During the night, most time was spent close to the surface (86% ± 9.4%; P < 0.01) and at depths of less than 12 m. From 2016 to 2019, active acoustics (scientific echosounders) were used to record prey (euphausiids) density and distribution simultaneously with whale diving data. Tagged whales appeared to perform dives relative to the vertical migration of prey during the day. The association between diurnal prey migration and shallow nighttime dive behavior suggests that blue whales are at increased risk of ship collisions during periods of darkness since the estimated maximum ship draft of vessels operating in the region is also ≈12 m. In recent decades, northern Chilean Patagonia has seen a large increase in marine traffic due to a boom in salmon aquaculture and the passenger ship industry. Vessel strike risks for large whales are likely underestimated in this region. Results reported in this study may be valuable for policy and mitigation decisions regarding conservation of the endangered blue whale. |
format |
Text |
author |
CARUSO, Francesco HICKMOTT, Leigh WARREN, Joseph D. SEGRE, Paolo CHIANG, Gustavo BAHAMONDE, Paulina ESPAÑOL‐JIMÉNEZ, Sonia LI, Songhai BOCCONCELLI, Alessandro |
author_facet |
CARUSO, Francesco HICKMOTT, Leigh WARREN, Joseph D. SEGRE, Paolo CHIANG, Gustavo BAHAMONDE, Paulina ESPAÑOL‐JIMÉNEZ, Sonia LI, Songhai BOCCONCELLI, Alessandro |
author_sort |
CARUSO, Francesco |
title |
Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
title_short |
Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
title_full |
Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
title_fullStr |
Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
title_full_unstemmed |
Diel differences in blue whale (Balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern Chilean Patagonia |
title_sort |
diel differences in blue whale (balaenoptera musculus) dive behavior increase nighttime risk of ship strikes in northern chilean patagonia |
publisher |
John Wiley and Sons Inc. |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9290343/ http://www.ncbi.nlm.nih.gov/pubmed/33166068 https://doi.org/10.1111/1749-4877.12501 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Balaenoptera musculus Blue whale |
genre_facet |
Balaenoptera musculus Blue whale |
op_source |
Integr Zool |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9290343/ http://www.ncbi.nlm.nih.gov/pubmed/33166068 http://dx.doi.org/10.1111/1749-4877.12501 |
op_rights |
© 2020 The Authors. Integrative Zoology published by International Society of Zoological Sciences, Institute of Zoology/Chinese Academy of Sciences and John Wiley & Sons Australia, Ltd https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1111/1749-4877.12501 |
container_title |
Integrative Zoology |
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16 |
container_issue |
4 |
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594 |
op_container_end_page |
611 |
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1766366678127476736 |