Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand
Autonomous recorders are frequently used for examining vocal behaviour of animals, and are particularly effective in remote habitats. Southern right whales are known to have an extensive acoustic repertoire. A recorder was moored at the isolated sub-Antarctic Auckland Islands for a year to examine w...
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crroyalsociety:10.1098/rsos.181487 2024-06-02T07:57:30+00:00 Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand Webster, T. A. Van Parijs, S. M. Rayment, W. J. Dawson, S. M. Foundation for Research Science and Technology University of Otago Otago Museum New Zealand Whale and Dolphin Trust 2019 http://dx.doi.org/10.1098/rsos.181487 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181487 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.181487 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 6, issue 3, page 181487 ISSN 2054-5703 journal-article 2019 crroyalsociety https://doi.org/10.1098/rsos.181487 2024-05-07T14:16:33Z Autonomous recorders are frequently used for examining vocal behaviour of animals, and are particularly effective in remote habitats. Southern right whales are known to have an extensive acoustic repertoire. A recorder was moored at the isolated sub-Antarctic Auckland Islands for a year to examine whether the acoustic behaviour of southern right whales differed seasonally and throughout the day at their main calving ground in New Zealand. Recordings were made in each month except June, and vocalizations were audible in all months with recordings except January. A total of 35 487 calls were detected, of which upcalls were the most common (11 623). Call rate peaked in August (288 ± 5.9 [s.e.] calls/hour) and July (194 ± 8.3). Vocal behaviour varied diurnally with highest call rates detected at dusk and night, consistent with the concept that upcalls function primarily as contact calls. Zero-inflated model results confirmed that seasonal variation was the most important factor for explaining differences in vocal behaviour. An automated detector designed to expedite the analysis process for North Atlantic right whales correctly identified 80% of upcalls, although false detections were frequent, particularly when call rates were low. This study is the first to attempt year-round monitoring of southern right whale presence in New Zealand. Article in Journal/Newspaper Antarc* Antarctic Auckland Islands North Atlantic Southern Right Whale The Royal Society Antarctic New Zealand Royal Society Open Science 6 3 181487 |
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Open Polar |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Autonomous recorders are frequently used for examining vocal behaviour of animals, and are particularly effective in remote habitats. Southern right whales are known to have an extensive acoustic repertoire. A recorder was moored at the isolated sub-Antarctic Auckland Islands for a year to examine whether the acoustic behaviour of southern right whales differed seasonally and throughout the day at their main calving ground in New Zealand. Recordings were made in each month except June, and vocalizations were audible in all months with recordings except January. A total of 35 487 calls were detected, of which upcalls were the most common (11 623). Call rate peaked in August (288 ± 5.9 [s.e.] calls/hour) and July (194 ± 8.3). Vocal behaviour varied diurnally with highest call rates detected at dusk and night, consistent with the concept that upcalls function primarily as contact calls. Zero-inflated model results confirmed that seasonal variation was the most important factor for explaining differences in vocal behaviour. An automated detector designed to expedite the analysis process for North Atlantic right whales correctly identified 80% of upcalls, although false detections were frequent, particularly when call rates were low. This study is the first to attempt year-round monitoring of southern right whale presence in New Zealand. |
author2 |
Foundation for Research Science and Technology University of Otago Otago Museum New Zealand Whale and Dolphin Trust |
format |
Article in Journal/Newspaper |
author |
Webster, T. A. Van Parijs, S. M. Rayment, W. J. Dawson, S. M. |
spellingShingle |
Webster, T. A. Van Parijs, S. M. Rayment, W. J. Dawson, S. M. Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
author_facet |
Webster, T. A. Van Parijs, S. M. Rayment, W. J. Dawson, S. M. |
author_sort |
Webster, T. A. |
title |
Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
title_short |
Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
title_full |
Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
title_fullStr |
Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
title_full_unstemmed |
Temporal variation in the vocal behaviour of southern right whales in the Auckland Islands, New Zealand |
title_sort |
temporal variation in the vocal behaviour of southern right whales in the auckland islands, new zealand |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://dx.doi.org/10.1098/rsos.181487 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.181487 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.181487 |
geographic |
Antarctic New Zealand |
geographic_facet |
Antarctic New Zealand |
genre |
Antarc* Antarctic Auckland Islands North Atlantic Southern Right Whale |
genre_facet |
Antarc* Antarctic Auckland Islands North Atlantic Southern Right Whale |
op_source |
Royal Society Open Science volume 6, issue 3, page 181487 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.181487 |
container_title |
Royal Society Open Science |
container_volume |
6 |
container_issue |
3 |
container_start_page |
181487 |
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1800740650296016896 |