Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation
Comparative studies of vocal repertoires over the geographical range of a species can improve ourunderstanding of the function and evolution of animal vocalizations. They may also help to elucidaterelationships between populations, where genetic studies are missing or difficult to perform. We record...
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Norwegian Polar Institute
2008
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npolardata:oai:npolar.no:dataset/90add076-04d9-58c4-8f78-c777acb841ee 2024-03-03T22:15:37+00:00 Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation BEGINDATE: 1972-01-01 ENDDATE: 2001-12-31 ENVELOPE(11.66666667,11.66666667,79.0,79.0) OCEAN, ATLANTIC OCEAN, NORTH ATLANTIC OCEAN, SVALBARD AND JAN MAYEN, Kongsfjorden GEOGRAPHIC REGION, ARCTIC GEOGRAPHIC REGION, POLAR 2008-07-09 http://data.npolar.no/dataset/90add076-04d9-58c4-8f78-c777acb841ee unknown Norwegian Polar Institute BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS Dataset 2008 npolardata 2018-04-10T07:40:28Z Comparative studies of vocal repertoires over the geographical range of a species can improve ourunderstanding of the function and evolution of animal vocalizations. They may also help to elucidaterelationships between populations, where genetic studies are missing or difficult to perform. We recordedmale bearded seal vocalizations from four sites throughout their Arctic distribution. We measured 16parameters for each vocalization and examined variability using classification tree analyses. There werefour major call categories: trill, ascent, sweep and moan. Trills divided further into three subcategories:trills with ascent/plume, long trills and short trills. Not all call categories were present at all sites: the ascentoccurred only in Alaska and western Canada, the sweep occurred only in Svalbard and in the High CanadianArctic, and the trill with ascent/plume occurred at all sites except Svalbard. Geographical differencesbetween sites were apparent in repertoire size as well as in vocal structure. Furthermore, an eastwestgradient in structural similarities between call types was apparent. The vocal repertoire of bearded sealsseemed to be relatively stable; for example, over a period of 16 years no calls were lost or added to theAlaskan repertoire. The most likely explanation for the observed vocal differences between sites is thegeographical isolation of populations by physical distance. Other factors, such as varying ecological influences(e.g. adaptation to varying ice habitats) or sexual selection, may also contribute to vocal variabilityand result in the observed geographical variation. Dataset Arctic bearded seal Erignathus barbatus Jan Mayen Kongsfjord* Kongsfjorden North Atlantic Svalbard Alaska walrus* Norwegian Polar Data Centre Arctic Svalbard Canada Jan Mayen Svalbard ENVELOPE(20.000,20.000,78.000,78.000) Moan ENVELOPE(9.843,9.843,62.881,62.881) ENVELOPE(11.66666667,11.66666667,79.0,79.0) |
institution |
Open Polar |
collection |
Norwegian Polar Data Centre |
op_collection_id |
npolardata |
language |
unknown |
topic |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS |
spellingShingle |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
topic_facet |
BIOTA biology EARTH SCIENCE BIOLOGICAL CLASSIFICATION ANIMALS/VERTEBRATES MAMMALS CARNIVORES SEALS/SEA LIONS/WALRUSES BIOSPHERE ECOLOGICAL DYNAMICS |
description |
Comparative studies of vocal repertoires over the geographical range of a species can improve ourunderstanding of the function and evolution of animal vocalizations. They may also help to elucidaterelationships between populations, where genetic studies are missing or difficult to perform. We recordedmale bearded seal vocalizations from four sites throughout their Arctic distribution. We measured 16parameters for each vocalization and examined variability using classification tree analyses. There werefour major call categories: trill, ascent, sweep and moan. Trills divided further into three subcategories:trills with ascent/plume, long trills and short trills. Not all call categories were present at all sites: the ascentoccurred only in Alaska and western Canada, the sweep occurred only in Svalbard and in the High CanadianArctic, and the trill with ascent/plume occurred at all sites except Svalbard. Geographical differencesbetween sites were apparent in repertoire size as well as in vocal structure. Furthermore, an eastwestgradient in structural similarities between call types was apparent. The vocal repertoire of bearded sealsseemed to be relatively stable; for example, over a period of 16 years no calls were lost or added to theAlaskan repertoire. The most likely explanation for the observed vocal differences between sites is thegeographical isolation of populations by physical distance. Other factors, such as varying ecological influences(e.g. adaptation to varying ice habitats) or sexual selection, may also contribute to vocal variabilityand result in the observed geographical variation. |
format |
Dataset |
title |
Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
title_short |
Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
title_full |
Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
title_fullStr |
Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
title_full_unstemmed |
Vocalizations of male bearded seals, Erignathus barbatus: classification and geographical variation |
title_sort |
vocalizations of male bearded seals, erignathus barbatus: classification and geographical variation |
publisher |
Norwegian Polar Institute |
publishDate |
2008 |
url |
http://data.npolar.no/dataset/90add076-04d9-58c4-8f78-c777acb841ee |
op_coverage |
BEGINDATE: 1972-01-01 ENDDATE: 2001-12-31 ENVELOPE(11.66666667,11.66666667,79.0,79.0) OCEAN, ATLANTIC OCEAN, NORTH ATLANTIC OCEAN, SVALBARD AND JAN MAYEN, Kongsfjorden GEOGRAPHIC REGION, ARCTIC GEOGRAPHIC REGION, POLAR |
long_lat |
ENVELOPE(20.000,20.000,78.000,78.000) ENVELOPE(9.843,9.843,62.881,62.881) ENVELOPE(11.66666667,11.66666667,79.0,79.0) |
geographic |
Arctic Svalbard Canada Jan Mayen Svalbard Moan |
geographic_facet |
Arctic Svalbard Canada Jan Mayen Svalbard Moan |
genre |
Arctic bearded seal Erignathus barbatus Jan Mayen Kongsfjord* Kongsfjorden North Atlantic Svalbard Alaska walrus* |
genre_facet |
Arctic bearded seal Erignathus barbatus Jan Mayen Kongsfjord* Kongsfjorden North Atlantic Svalbard Alaska walrus* |
_version_ |
1792545052933750784 |