Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula
The calling seasonality of blue ( Balaenoptera musculus ) and fin ( B. physalus ) whales was assessed using acoustic data recorded on seven autonomous acoustic recording packages (ARPs) deployed from March 2001 to February 2003 in the Western Antarctic Peninsula. Automatic detection and acoustic pow...
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ftdeakinunifig:oai:figshare.com:article/20558964 2023-05-15T14:05:22+02:00 Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula A Sirovic J Hildebrand S Wiggins M McDonald S Moore Deborah Thiele 2004-08-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30008738 https://figshare.com/articles/journal_contribution/Seasonality_of_blue_and_fin_whale_calls_and_the_influence_of_sea_ice_in_the_Western_Antarctic_Peninsula/20558964 unknown http://hdl.handle.net/10536/DRO/DU:30008738 https://figshare.com/articles/journal_contribution/Seasonality_of_blue_and_fin_whale_calls_and_the_influence_of_sea_ice_in_the_Western_Antarctic_Peninsula/20558964 All Rights Reserved Geochemistry Oceanography Ecology Science & Technology Physical Sciences EASTERN TROPICAL PACIFIC BALAENOPTERA-MUSCULUS NORTH PACIFIC HUMPBACK WHALES MARINE BIRDS ICE EXTENT CALIFORNIA SOUNDS MIGRATION MAMMALS Text Journal contribution 2004 ftdeakinunifig 2022-11-17T23:09:08Z The calling seasonality of blue ( Balaenoptera musculus ) and fin ( B. physalus ) whales was assessed using acoustic data recorded on seven autonomous acoustic recording packages (ARPs) deployed from March 2001 to February 2003 in the Western Antarctic Peninsula. Automatic detection and acoustic power analysis methods were used for determining presence and absence of whale calls. Blue whale calls were detected year round, on average 177 days per year, with peak calling in March and April, and a secondary peak in October and November. Lowest calling rates occurred between June and September, and in December. Fin whale calling rates were seasonal with calls detected between February and June (on average 51 days/year), and peak calling in May. Sea ice formed a month later and retreated a month earlier in 2001 than in 2002 over all recording sites. During the entire deployment period, detected calls of both species of whales showed negative correlation with sea ice concentrations at all sites, suggesting an absence of blue and fin whales in areas covered with sea ice. A conservative density estimate of calling whales from the acoustic data yields 0.43 calling blue whales per 1000 n mi 2 and 1.30 calling fin whales per 1000 n mi 2 , which is about one-third higher than the density of blue whales and approximately equal to the density of fin whales estimated from the visual surveys. Other Non-Article Part of Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Fin whale Sea ice DRO - Deakin Research Online Antarctic Antarctic Peninsula Pacific |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Geochemistry Oceanography Ecology Science & Technology Physical Sciences EASTERN TROPICAL PACIFIC BALAENOPTERA-MUSCULUS NORTH PACIFIC HUMPBACK WHALES MARINE BIRDS ICE EXTENT CALIFORNIA SOUNDS MIGRATION MAMMALS |
spellingShingle |
Geochemistry Oceanography Ecology Science & Technology Physical Sciences EASTERN TROPICAL PACIFIC BALAENOPTERA-MUSCULUS NORTH PACIFIC HUMPBACK WHALES MARINE BIRDS ICE EXTENT CALIFORNIA SOUNDS MIGRATION MAMMALS A Sirovic J Hildebrand S Wiggins M McDonald S Moore Deborah Thiele Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
topic_facet |
Geochemistry Oceanography Ecology Science & Technology Physical Sciences EASTERN TROPICAL PACIFIC BALAENOPTERA-MUSCULUS NORTH PACIFIC HUMPBACK WHALES MARINE BIRDS ICE EXTENT CALIFORNIA SOUNDS MIGRATION MAMMALS |
description |
The calling seasonality of blue ( Balaenoptera musculus ) and fin ( B. physalus ) whales was assessed using acoustic data recorded on seven autonomous acoustic recording packages (ARPs) deployed from March 2001 to February 2003 in the Western Antarctic Peninsula. Automatic detection and acoustic power analysis methods were used for determining presence and absence of whale calls. Blue whale calls were detected year round, on average 177 days per year, with peak calling in March and April, and a secondary peak in October and November. Lowest calling rates occurred between June and September, and in December. Fin whale calling rates were seasonal with calls detected between February and June (on average 51 days/year), and peak calling in May. Sea ice formed a month later and retreated a month earlier in 2001 than in 2002 over all recording sites. During the entire deployment period, detected calls of both species of whales showed negative correlation with sea ice concentrations at all sites, suggesting an absence of blue and fin whales in areas covered with sea ice. A conservative density estimate of calling whales from the acoustic data yields 0.43 calling blue whales per 1000 n mi 2 and 1.30 calling fin whales per 1000 n mi 2 , which is about one-third higher than the density of blue whales and approximately equal to the density of fin whales estimated from the visual surveys. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
A Sirovic J Hildebrand S Wiggins M McDonald S Moore Deborah Thiele |
author_facet |
A Sirovic J Hildebrand S Wiggins M McDonald S Moore Deborah Thiele |
author_sort |
A Sirovic |
title |
Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
title_short |
Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
title_full |
Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
title_fullStr |
Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
title_full_unstemmed |
Seasonality of blue and fin whale calls and the influence of sea ice in the Western Antarctic Peninsula |
title_sort |
seasonality of blue and fin whale calls and the influence of sea ice in the western antarctic peninsula |
publishDate |
2004 |
url |
http://hdl.handle.net/10536/DRO/DU:30008738 https://figshare.com/articles/journal_contribution/Seasonality_of_blue_and_fin_whale_calls_and_the_influence_of_sea_ice_in_the_Western_Antarctic_Peninsula/20558964 |
geographic |
Antarctic Antarctic Peninsula Pacific |
geographic_facet |
Antarctic Antarctic Peninsula Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Fin whale Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Balaenoptera musculus Blue whale Fin whale Sea ice |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30008738 https://figshare.com/articles/journal_contribution/Seasonality_of_blue_and_fin_whale_calls_and_the_influence_of_sea_ice_in_the_Western_Antarctic_Peninsula/20558964 |
op_rights |
All Rights Reserved |
_version_ |
1766277180796436480 |