Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations
Harp seal (Pagophilus groenlandicus (Erxleben, 1777)) daytime calling depth during the breeding season and Weddell seal (Leptonychotes weddellii (Lesson, 1826)) daytime and nighttime calling depth during the winter and breeding seasons were investigated using a small vertical array with hydrophones...
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2005
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Online Access: | http://dx.doi.org/10.1139/z05-135 http://www.nrcresearchpress.com/doi/pdf/10.1139/z05-135 |
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crcansciencepubl:10.1139/z05-135 2023-12-17T10:31:18+01:00 Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations Moors, Hilary B Terhune, John M 2005 http://dx.doi.org/10.1139/z05-135 http://www.nrcresearchpress.com/doi/pdf/10.1139/z05-135 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 83, issue 11, page 1438-1452 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2005 crcansciencepubl https://doi.org/10.1139/z05-135 2023-11-19T13:39:22Z Harp seal (Pagophilus groenlandicus (Erxleben, 1777)) daytime calling depth during the breeding season and Weddell seal (Leptonychotes weddellii (Lesson, 1826)) daytime and nighttime calling depth during the winter and breeding seasons were investigated using a small vertical array with hydrophones placed at depths of 10 and 60 m. Rough calling depth estimates (<35 m, ~35 m, >35 m) and more accurate point depth estimates (±5–10 m in most cases) were obtained. Significantly more calls were produced at depths ≤35 m for both species. The point depth estimates indicated that the calls occurred most frequently at depths >10 m; 60% of harp seal calls and 71% of Weddell seal calls occurred at depths between 10 and 35 m. The seals called predominately within areas of the water column where light would likely penetrate, but still avoided sea-ice interference to some extent. The vocalizations did not change over depth with respect to call type, the number of elements within a call, or total call duration, or with respect to season and light condition for Weddell seals. Frequency (kHz) of calls also did not change with depth, suggesting that harp and Weddell seals control the pitch of their vocalizations with the vocal cords of the larynx. Article in Journal/Newspaper Harp Seal Pagophilus groenlandicus Sea ice Weddell Seal Weddell Seals Canadian Science Publishing (via Crossref) Weddell Canadian Journal of Zoology 83 11 1438 1452 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Moors, Hilary B Terhune, John M Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Harp seal (Pagophilus groenlandicus (Erxleben, 1777)) daytime calling depth during the breeding season and Weddell seal (Leptonychotes weddellii (Lesson, 1826)) daytime and nighttime calling depth during the winter and breeding seasons were investigated using a small vertical array with hydrophones placed at depths of 10 and 60 m. Rough calling depth estimates (<35 m, ~35 m, >35 m) and more accurate point depth estimates (±5–10 m in most cases) were obtained. Significantly more calls were produced at depths ≤35 m for both species. The point depth estimates indicated that the calls occurred most frequently at depths >10 m; 60% of harp seal calls and 71% of Weddell seal calls occurred at depths between 10 and 35 m. The seals called predominately within areas of the water column where light would likely penetrate, but still avoided sea-ice interference to some extent. The vocalizations did not change over depth with respect to call type, the number of elements within a call, or total call duration, or with respect to season and light condition for Weddell seals. Frequency (kHz) of calls also did not change with depth, suggesting that harp and Weddell seals control the pitch of their vocalizations with the vocal cords of the larynx. |
format |
Article in Journal/Newspaper |
author |
Moors, Hilary B Terhune, John M |
author_facet |
Moors, Hilary B Terhune, John M |
author_sort |
Moors, Hilary B |
title |
Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
title_short |
Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
title_full |
Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
title_fullStr |
Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
title_full_unstemmed |
Calling depth and time and frequency attributes of harp ( Pagophilus groenlandicus ) and Weddell ( Leptonychotes weddellii ) seal underwater vocalizations |
title_sort |
calling depth and time and frequency attributes of harp ( pagophilus groenlandicus ) and weddell ( leptonychotes weddellii ) seal underwater vocalizations |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/z05-135 http://www.nrcresearchpress.com/doi/pdf/10.1139/z05-135 |
geographic |
Weddell |
geographic_facet |
Weddell |
genre |
Harp Seal Pagophilus groenlandicus Sea ice Weddell Seal Weddell Seals |
genre_facet |
Harp Seal Pagophilus groenlandicus Sea ice Weddell Seal Weddell Seals |
op_source |
Canadian Journal of Zoology volume 83, issue 11, page 1438-1452 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z05-135 |
container_title |
Canadian Journal of Zoology |
container_volume |
83 |
container_issue |
11 |
container_start_page |
1438 |
op_container_end_page |
1452 |
_version_ |
1785584519567376384 |