Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus)
To learn more about occurrence and behavior of a recently discovered population of blue whales, passive acoustic data were collected for 15 consecutive months (January 2012 – April 2013) in the Chiloense ecoregion of southern Chile. Automatic detectors and manual auditing were used to detect blue wh...
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2022
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/27919 2023-05-15T15:36:20+02:00 Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) Redaelli, Laura Mangia Woods, Sari Landea Briones, Rafaela Sayigh, Laela S. 2022-01-13 https://hdl.handle.net/1912/27919 unknown Woods Hole Oceanographic Institution https://doi.org/10.1111/mms.12519 https://hdl.handle.net/1912/29051 https://hdl.handle.net/1912/27919 doi:10.26025/1912/27919 doi:10.26025/1912/27919 Chilean blue whales Marine bioacoustics Balaenoptera musculus Chile D calls SEP calls Diel patterns Seasonal trends Marine conservation Dataset 2022 ftwhoas https://doi.org/10.26025/1912/27919 https://doi.org/10.1111/mms.12519 2022-10-22T22:57:11Z To learn more about occurrence and behavior of a recently discovered population of blue whales, passive acoustic data were collected for 15 consecutive months (January 2012 – April 2013) in the Chiloense ecoregion of southern Chile. Automatic detectors and manual auditing were used to detect blue whale songs (SEP calls) and D calls, which were then analyzed to gain insights into temporal calling patterns. We found a year-round acoustic presence of D calls, with the majority occurring during austral summer (December to April), with several sub-monthly peaks. On the other hand, no SEP calls were found during austral winter. Thus, our results support previous studies documenting austral summer residency of blue whales in the Chiloense ecoregion, although they suggest that some individuals remain in the area year-round, highlighting the importance of the Chiloense ecoregion as blue whale habitat. We also investigated daily occurrence of each call type and found that D calls occurred more frequently during dusk and night hours compared to dawn and day periods, whereas SEP calls did not show any significant diel differences. Overall, these findings contribute to a better understanding of occurrence and behavior of endangered Chilean blue whales, which can enhance our ability to develop conservation strategies in this important southern hemisphere habitat. Dataset Balaenoptera musculus Blue whale Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Austral |
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Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Chilean blue whales Marine bioacoustics Balaenoptera musculus Chile D calls SEP calls Diel patterns Seasonal trends Marine conservation |
spellingShingle |
Chilean blue whales Marine bioacoustics Balaenoptera musculus Chile D calls SEP calls Diel patterns Seasonal trends Marine conservation Redaelli, Laura Mangia Woods, Sari Landea Briones, Rafaela Sayigh, Laela S. Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
topic_facet |
Chilean blue whales Marine bioacoustics Balaenoptera musculus Chile D calls SEP calls Diel patterns Seasonal trends Marine conservation |
description |
To learn more about occurrence and behavior of a recently discovered population of blue whales, passive acoustic data were collected for 15 consecutive months (January 2012 – April 2013) in the Chiloense ecoregion of southern Chile. Automatic detectors and manual auditing were used to detect blue whale songs (SEP calls) and D calls, which were then analyzed to gain insights into temporal calling patterns. We found a year-round acoustic presence of D calls, with the majority occurring during austral summer (December to April), with several sub-monthly peaks. On the other hand, no SEP calls were found during austral winter. Thus, our results support previous studies documenting austral summer residency of blue whales in the Chiloense ecoregion, although they suggest that some individuals remain in the area year-round, highlighting the importance of the Chiloense ecoregion as blue whale habitat. We also investigated daily occurrence of each call type and found that D calls occurred more frequently during dusk and night hours compared to dawn and day periods, whereas SEP calls did not show any significant diel differences. Overall, these findings contribute to a better understanding of occurrence and behavior of endangered Chilean blue whales, which can enhance our ability to develop conservation strategies in this important southern hemisphere habitat. |
format |
Dataset |
author |
Redaelli, Laura Mangia Woods, Sari Landea Briones, Rafaela Sayigh, Laela S. |
author_facet |
Redaelli, Laura Mangia Woods, Sari Landea Briones, Rafaela Sayigh, Laela S. |
author_sort |
Redaelli, Laura |
title |
Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
title_short |
Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
title_full |
Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
title_fullStr |
Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
title_full_unstemmed |
Seasonal trends and diel patterns of downsweep and SEP calls in Chilean blue whales (Balaenoptera musculus) |
title_sort |
seasonal trends and diel patterns of downsweep and sep calls in chilean blue whales (balaenoptera musculus) |
publisher |
Woods Hole Oceanographic Institution |
publishDate |
2022 |
url |
https://hdl.handle.net/1912/27919 |
geographic |
Austral |
geographic_facet |
Austral |
genre |
Balaenoptera musculus Blue whale |
genre_facet |
Balaenoptera musculus Blue whale |
op_source |
doi:10.26025/1912/27919 |
op_relation |
https://doi.org/10.1111/mms.12519 https://hdl.handle.net/1912/29051 https://hdl.handle.net/1912/27919 doi:10.26025/1912/27919 |
op_doi |
https://doi.org/10.26025/1912/27919 https://doi.org/10.1111/mms.12519 |
_version_ |
1766366674520375296 |