Underwater vocalizations of ice breeding grey seals
Grey seals (Halichoerus grypus) breed both on land and on the ice. In January 1991, 36 h of underwater recordings were made from Amet Island, located in ice-covered waters in the southern Gulf of St. Lawrence. All vocalizations were examined for spectral and temporal structure and then classified in...
Published in: | Canadian Journal of Zoology |
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Language: | English |
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Canadian Science Publishing
1993
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Online Access: | http://dx.doi.org/10.1139/z93-310 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-310 |
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crcansciencepubl:10.1139/z93-310 2024-09-15T18:41:41+00:00 Underwater vocalizations of ice breeding grey seals Asselin, Sylvie Hammill, Mike O. Barrette, Cyrille 1993 http://dx.doi.org/10.1139/z93-310 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-310 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 71, issue 11, page 2211-2219 ISSN 0008-4301 1480-3283 journal-article 1993 crcansciencepubl https://doi.org/10.1139/z93-310 2024-07-18T04:13:34Z Grey seals (Halichoerus grypus) breed both on land and on the ice. In January 1991, 36 h of underwater recordings were made from Amet Island, located in ice-covered waters in the southern Gulf of St. Lawrence. All vocalizations were examined for spectral and temporal structure and then classified into 1 of 7 call types. The majority of calls consisted of guttural "rups" and "rupes" (frequency = 100–3000 Hz), and low-frequency growls (100–500 Hz). Other less common vocalizations were low-frequency clicks (3000 Hz), as well as loud knocks, similar to knocking vocalizations recorded in walrus, and which had not been described previously for grey seals. The total number of vocalizations and the number of specific call types showed seasonal variations. The rate of vocalizations increased with the intensity of social activity and with the number of agonistic behaviors during the progression of the breeding season. Comparisons between night and day showed some changes in the vocal repertoire. Low-frequency clicks were recorded more often during darkness (17.1% of calls) than in daylight (1.9%), and when ice cover was more extensive. Article in Journal/Newspaper ice covered waters walrus* Canadian Science Publishing Canadian Journal of Zoology 71 11 2211 2219 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Grey seals (Halichoerus grypus) breed both on land and on the ice. In January 1991, 36 h of underwater recordings were made from Amet Island, located in ice-covered waters in the southern Gulf of St. Lawrence. All vocalizations were examined for spectral and temporal structure and then classified into 1 of 7 call types. The majority of calls consisted of guttural "rups" and "rupes" (frequency = 100–3000 Hz), and low-frequency growls (100–500 Hz). Other less common vocalizations were low-frequency clicks (3000 Hz), as well as loud knocks, similar to knocking vocalizations recorded in walrus, and which had not been described previously for grey seals. The total number of vocalizations and the number of specific call types showed seasonal variations. The rate of vocalizations increased with the intensity of social activity and with the number of agonistic behaviors during the progression of the breeding season. Comparisons between night and day showed some changes in the vocal repertoire. Low-frequency clicks were recorded more often during darkness (17.1% of calls) than in daylight (1.9%), and when ice cover was more extensive. |
format |
Article in Journal/Newspaper |
author |
Asselin, Sylvie Hammill, Mike O. Barrette, Cyrille |
spellingShingle |
Asselin, Sylvie Hammill, Mike O. Barrette, Cyrille Underwater vocalizations of ice breeding grey seals |
author_facet |
Asselin, Sylvie Hammill, Mike O. Barrette, Cyrille |
author_sort |
Asselin, Sylvie |
title |
Underwater vocalizations of ice breeding grey seals |
title_short |
Underwater vocalizations of ice breeding grey seals |
title_full |
Underwater vocalizations of ice breeding grey seals |
title_fullStr |
Underwater vocalizations of ice breeding grey seals |
title_full_unstemmed |
Underwater vocalizations of ice breeding grey seals |
title_sort |
underwater vocalizations of ice breeding grey seals |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/z93-310 http://www.nrcresearchpress.com/doi/pdf/10.1139/z93-310 |
genre |
ice covered waters walrus* |
genre_facet |
ice covered waters walrus* |
op_source |
Canadian Journal of Zoology volume 71, issue 11, page 2211-2219 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z93-310 |
container_title |
Canadian Journal of Zoology |
container_volume |
71 |
container_issue |
11 |
container_start_page |
2211 |
op_container_end_page |
2219 |
_version_ |
1810486069676736512 |