Repetitive rates of harp seal underwater vocalizations
Underwater recordings of harp seal (Phoca groenlandica) vocalizations, obtained within the breeding herd during March, were examined with respect to calling rate and repetition of calls. Vocalizations typically overlapped one another. Calling rates ranged from 32 to 88 calls/min. Repetition rates av...
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1987
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Online Access: | http://dx.doi.org/10.1139/z87-326 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-326 |
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crcansciencepubl:10.1139/z87-326 2023-12-17T10:31:17+01:00 Repetitive rates of harp seal underwater vocalizations Terhune, J. M. MacGowan, G. Underhill, L. Ronald, K. 1987 http://dx.doi.org/10.1139/z87-326 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-326 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 8, page 2119-2120 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-326 2023-11-19T13:38:59Z Underwater recordings of harp seal (Phoca groenlandica) vocalizations, obtained within the breeding herd during March, were examined with respect to calling rate and repetition of calls. Vocalizations typically overlapped one another. Calling rates ranged from 32 to 88 calls/min. Repetition rates averaged between 1.9 and 4.7 sound pulses/call (maximum repetition 24 times). Approximately 30% of the calls were not repeated and 40% were repeated twice. We found no significant relationships between calling rates and repetition rates. There were no variations in these factors throughout the day or month. An automatic level control on the recorder and the overlapping of the calls may have compromised the counts by altering the effective sampling area. The use of vocalization indexes in association with population estimations may be possible only when calls do not overlap. Article in Journal/Newspaper Harp Seal Phoca groenlandica Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 65 8 2119 2120 |
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 Terhune, J. M. MacGowan, G. Underhill, L. Ronald, K. Repetitive rates of harp seal underwater vocalizations |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Underwater recordings of harp seal (Phoca groenlandica) vocalizations, obtained within the breeding herd during March, were examined with respect to calling rate and repetition of calls. Vocalizations typically overlapped one another. Calling rates ranged from 32 to 88 calls/min. Repetition rates averaged between 1.9 and 4.7 sound pulses/call (maximum repetition 24 times). Approximately 30% of the calls were not repeated and 40% were repeated twice. We found no significant relationships between calling rates and repetition rates. There were no variations in these factors throughout the day or month. An automatic level control on the recorder and the overlapping of the calls may have compromised the counts by altering the effective sampling area. The use of vocalization indexes in association with population estimations may be possible only when calls do not overlap. |
format |
Article in Journal/Newspaper |
author |
Terhune, J. M. MacGowan, G. Underhill, L. Ronald, K. |
author_facet |
Terhune, J. M. MacGowan, G. Underhill, L. Ronald, K. |
author_sort |
Terhune, J. M. |
title |
Repetitive rates of harp seal underwater vocalizations |
title_short |
Repetitive rates of harp seal underwater vocalizations |
title_full |
Repetitive rates of harp seal underwater vocalizations |
title_fullStr |
Repetitive rates of harp seal underwater vocalizations |
title_full_unstemmed |
Repetitive rates of harp seal underwater vocalizations |
title_sort |
repetitive rates of harp seal underwater vocalizations |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-326 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-326 |
genre |
Harp Seal Phoca groenlandica |
genre_facet |
Harp Seal Phoca groenlandica |
op_source |
Canadian Journal of Zoology volume 65, issue 8, page 2119-2120 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-326 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
8 |
container_start_page |
2119 |
op_container_end_page |
2120 |
_version_ |
1785584508623388672 |