Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer
We used a mandible accelerometer to document feeding events in two free-ranging adult female Weddell seals in Atka Bay, Antarctica. Using spectral analysis, we isolated several patterns in the mandible acceleration data. The shorter, un-attenuated signals are thought to represent feeding. The longer...
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Language: | English |
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Online Access: | http://hdl.handle.net/2263/16732 https://doi.org/10.1016/j.polar.2010.05.009 |
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ftunivpretoria:oai:repository.up.ac.za:2263/16732 2023-05-15T14:02:58+02:00 Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer Naito, Yasuhiko Bornemann, Horst Takahashi, Akinori McIntyre, Trevor Plotz, Joachim 2010-08 http://hdl.handle.net/2263/16732 https://doi.org/10.1016/j.polar.2010.05.009 en eng Elsevier http://hdl.handle.net/2263/16732 Naito, Y. et al., Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer, (2010), doi:10.1016/j.polar.2010.05.009 1873-9652 (print) 1876-4428 (online) doi:10.1016/j.polar.2010.05.009 © 2010 Elsevier B.V. and NIPR All rights reserved. Mandible accelerometers Feeding events Weddell seals Sub-iceberg feeding Vocalization by animals Seals (Animals) -- Food -- Antarctica -- Atka Iceport Seals (Animals) -- Feeding and feeds -- Antarctica -- Weddell Sea Accelerometers Sound production by animals -- Antarctica -- Atka Iceport Seals (Animals) -- Vocalization -- Antarctica -- Weddell Sea Postprint Article 2010 ftunivpretoria https://doi.org/10.1016/j.polar.2010.05.009 2022-05-31T13:22:52Z We used a mandible accelerometer to document feeding events in two free-ranging adult female Weddell seals in Atka Bay, Antarctica. Using spectral analysis, we isolated several patterns in the mandible acceleration data. The shorter, un-attenuated signals are thought to represent feeding. The longer, attenuating signals are thought to represent vocalizing activities. The depth data suggest that one seal dived under the base of the iceberg. During these dives we detected a unique type of feeding signal. These signals were characterized by patterns of low amplitude and irregular peaks. A second signal type, characterized by a larger amplitude, was observed 75 times at depths shallower than 60 m. The number of feeding signals per dive was higher for iceberg associated dives (>60 m, 11.3 signals/dive) than for dives to midwater depths (<60 m, 0.5 signals/dive). Our results support the hypothesis that underwater surface of icebergs serves as a habitat for marine fauna.We recorded the first vocalization related signals in seals using a mandible accelerometer. One seal spent significantly more time in shallow water and foraged less than the second seal. This seal also vocalized more often (135 events) than the second individual (29 events), possibly due to an emphasis on mating behavior. Article in Journal/Newspaper Antarc* Antarctica Weddell Sea Weddell Seals University of Pretoria: UPSpace Weddell Sea Weddell Atka ENVELOPE(151.789,151.789,60.835,60.835) Atka Iceport ENVELOPE(-7.850,-7.850,-70.583,-70.583) Polar Science 4 2 309 316 |
institution |
Open Polar |
collection |
University of Pretoria: UPSpace |
op_collection_id |
ftunivpretoria |
language |
English |
topic |
Mandible accelerometers Feeding events Weddell seals Sub-iceberg feeding Vocalization by animals Seals (Animals) -- Food -- Antarctica -- Atka Iceport Seals (Animals) -- Feeding and feeds -- Antarctica -- Weddell Sea Accelerometers Sound production by animals -- Antarctica -- Atka Iceport Seals (Animals) -- Vocalization -- Antarctica -- Weddell Sea |
spellingShingle |
Mandible accelerometers Feeding events Weddell seals Sub-iceberg feeding Vocalization by animals Seals (Animals) -- Food -- Antarctica -- Atka Iceport Seals (Animals) -- Feeding and feeds -- Antarctica -- Weddell Sea Accelerometers Sound production by animals -- Antarctica -- Atka Iceport Seals (Animals) -- Vocalization -- Antarctica -- Weddell Sea Naito, Yasuhiko Bornemann, Horst Takahashi, Akinori McIntyre, Trevor Plotz, Joachim Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
topic_facet |
Mandible accelerometers Feeding events Weddell seals Sub-iceberg feeding Vocalization by animals Seals (Animals) -- Food -- Antarctica -- Atka Iceport Seals (Animals) -- Feeding and feeds -- Antarctica -- Weddell Sea Accelerometers Sound production by animals -- Antarctica -- Atka Iceport Seals (Animals) -- Vocalization -- Antarctica -- Weddell Sea |
description |
We used a mandible accelerometer to document feeding events in two free-ranging adult female Weddell seals in Atka Bay, Antarctica. Using spectral analysis, we isolated several patterns in the mandible acceleration data. The shorter, un-attenuated signals are thought to represent feeding. The longer, attenuating signals are thought to represent vocalizing activities. The depth data suggest that one seal dived under the base of the iceberg. During these dives we detected a unique type of feeding signal. These signals were characterized by patterns of low amplitude and irregular peaks. A second signal type, characterized by a larger amplitude, was observed 75 times at depths shallower than 60 m. The number of feeding signals per dive was higher for iceberg associated dives (>60 m, 11.3 signals/dive) than for dives to midwater depths (<60 m, 0.5 signals/dive). Our results support the hypothesis that underwater surface of icebergs serves as a habitat for marine fauna.We recorded the first vocalization related signals in seals using a mandible accelerometer. One seal spent significantly more time in shallow water and foraged less than the second seal. This seal also vocalized more often (135 events) than the second individual (29 events), possibly due to an emphasis on mating behavior. |
format |
Article in Journal/Newspaper |
author |
Naito, Yasuhiko Bornemann, Horst Takahashi, Akinori McIntyre, Trevor Plotz, Joachim |
author_facet |
Naito, Yasuhiko Bornemann, Horst Takahashi, Akinori McIntyre, Trevor Plotz, Joachim |
author_sort |
Naito, Yasuhiko |
title |
Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
title_short |
Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
title_full |
Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
title_fullStr |
Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
title_full_unstemmed |
Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer |
title_sort |
fine-scale feeding behavior of weddell seals revealed by a mandible accelerometer |
publisher |
Elsevier |
publishDate |
2010 |
url |
http://hdl.handle.net/2263/16732 https://doi.org/10.1016/j.polar.2010.05.009 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-7.850,-7.850,-70.583,-70.583) |
geographic |
Weddell Sea Weddell Atka Atka Iceport |
geographic_facet |
Weddell Sea Weddell Atka Atka Iceport |
genre |
Antarc* Antarctica Weddell Sea Weddell Seals |
genre_facet |
Antarc* Antarctica Weddell Sea Weddell Seals |
op_relation |
http://hdl.handle.net/2263/16732 Naito, Y. et al., Fine-scale feeding behavior of Weddell seals revealed by a mandible accelerometer, (2010), doi:10.1016/j.polar.2010.05.009 1873-9652 (print) 1876-4428 (online) doi:10.1016/j.polar.2010.05.009 |
op_rights |
© 2010 Elsevier B.V. and NIPR All rights reserved. |
op_doi |
https://doi.org/10.1016/j.polar.2010.05.009 |
container_title |
Polar Science |
container_volume |
4 |
container_issue |
2 |
container_start_page |
309 |
op_container_end_page |
316 |
_version_ |
1766273418137698304 |