Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM)
We examined the underwater behavior of blue whales using a suction-cup-attached video-imaging instrument (CRITTERCAM). We made 13 successful deployments (defined as tag duration of 15 min and successful recovery of the tag and data) totaling 19 hours of CRITTERCAMs on blue whales off California and...
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ftdtic:ADA588204 2023-05-15T15:45:11+02:00 Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) Calambokidis, John Schorr, Greg S Steiger, Gretchen H Francis, John Bakhtiari, Mehdi Marshall, Greg Oleson, Erin M Gendron, Diane Robertson, Kelly CASCADIA RESEARCH COLLECTIVE OLYMPIA WA 2008-01 text/html http://www.dtic.mil/docs/citations/ADA588204 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA588204 en eng http://www.dtic.mil/docs/citations/ADA588204 Approved for public release; distribution is unlimited. DTIC Biology Photography *BEHAVIOR *CAMERAS *WHALES DIURNAL VARIATIONS DIVING FEEDING FLOW NOISE INDICATORS INSTRUMENTATION INTERACTIONS LABELS MOTION REPRINTS UNDERWATER VIDEO SIGNALS VISIBILITY CRITTERCAM *BLUE WHALES Text 2008 ftdtic 2016-02-24T12:41:08Z We examined the underwater behavior of blue whales using a suction-cup-attached video-imaging instrument (CRITTERCAM). We made 13 successful deployments (defined as tag duration of 15 min and successful recovery of the tag and data) totaling 19 hours of CRITTERCAMs on blue whales off California and in the Sea of Cortez from spring through fall (26 February to 30 September) between 1999 and 2003 . Whale diving depth and behavior varied widely by region and period, although deployments on different individuals in the same area and period often showed very similar feeding behavior. One deployment extending into night showed a diurnal shift in diving behavior with progressively shallower feeding dives as it became dark, with shift to shallow, apparently non-feeding dives during the night. Data and video from tags demonstrated that the characteristic series of vertical movements blue whales make at depth are lunges into dense aggregations of krill. These krill were visible streaming by the camera immediately before these lunges and more clearly when the whales? forward motion stopped as a result of the lunge. The progression of events leading up to and during the lunge could be documented from the head movement of whales and occasional views of the expanding throat pleats or lower jaw, and by changes in flow noise past the tag, indicating a rapid deceleration. One set of deployments in the Southern California Bight revealed consistent feeding at depths of 250-300 m, deeper than has been previously reported for blue whales. A loud blue whale vocalization was heard on only one deployment on a male blue whale in an interacting trio of animals. Published in marine Technology Society Journal v1 n4 p19-29 Winter 2007/2008. Text Blue whale Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Biology Photography *BEHAVIOR *CAMERAS *WHALES DIURNAL VARIATIONS DIVING FEEDING FLOW NOISE INDICATORS INSTRUMENTATION INTERACTIONS LABELS MOTION REPRINTS UNDERWATER VIDEO SIGNALS VISIBILITY CRITTERCAM *BLUE WHALES |
spellingShingle |
Biology Photography *BEHAVIOR *CAMERAS *WHALES DIURNAL VARIATIONS DIVING FEEDING FLOW NOISE INDICATORS INSTRUMENTATION INTERACTIONS LABELS MOTION REPRINTS UNDERWATER VIDEO SIGNALS VISIBILITY CRITTERCAM *BLUE WHALES Calambokidis, John Schorr, Greg S Steiger, Gretchen H Francis, John Bakhtiari, Mehdi Marshall, Greg Oleson, Erin M Gendron, Diane Robertson, Kelly Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
topic_facet |
Biology Photography *BEHAVIOR *CAMERAS *WHALES DIURNAL VARIATIONS DIVING FEEDING FLOW NOISE INDICATORS INSTRUMENTATION INTERACTIONS LABELS MOTION REPRINTS UNDERWATER VIDEO SIGNALS VISIBILITY CRITTERCAM *BLUE WHALES |
description |
We examined the underwater behavior of blue whales using a suction-cup-attached video-imaging instrument (CRITTERCAM). We made 13 successful deployments (defined as tag duration of 15 min and successful recovery of the tag and data) totaling 19 hours of CRITTERCAMs on blue whales off California and in the Sea of Cortez from spring through fall (26 February to 30 September) between 1999 and 2003 . Whale diving depth and behavior varied widely by region and period, although deployments on different individuals in the same area and period often showed very similar feeding behavior. One deployment extending into night showed a diurnal shift in diving behavior with progressively shallower feeding dives as it became dark, with shift to shallow, apparently non-feeding dives during the night. Data and video from tags demonstrated that the characteristic series of vertical movements blue whales make at depth are lunges into dense aggregations of krill. These krill were visible streaming by the camera immediately before these lunges and more clearly when the whales? forward motion stopped as a result of the lunge. The progression of events leading up to and during the lunge could be documented from the head movement of whales and occasional views of the expanding throat pleats or lower jaw, and by changes in flow noise past the tag, indicating a rapid deceleration. One set of deployments in the Southern California Bight revealed consistent feeding at depths of 250-300 m, deeper than has been previously reported for blue whales. A loud blue whale vocalization was heard on only one deployment on a male blue whale in an interacting trio of animals. Published in marine Technology Society Journal v1 n4 p19-29 Winter 2007/2008. |
author2 |
CASCADIA RESEARCH COLLECTIVE OLYMPIA WA |
format |
Text |
author |
Calambokidis, John Schorr, Greg S Steiger, Gretchen H Francis, John Bakhtiari, Mehdi Marshall, Greg Oleson, Erin M Gendron, Diane Robertson, Kelly |
author_facet |
Calambokidis, John Schorr, Greg S Steiger, Gretchen H Francis, John Bakhtiari, Mehdi Marshall, Greg Oleson, Erin M Gendron, Diane Robertson, Kelly |
author_sort |
Calambokidis, John |
title |
Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
title_short |
Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
title_full |
Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
title_fullStr |
Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
title_full_unstemmed |
Insights into the Underwater Diving, Feeding, and Calling Behavior of Blue Whales from a Suction-Cup-Attached Video-Imaging Tag (CRITTERCAM) |
title_sort |
insights into the underwater diving, feeding, and calling behavior of blue whales from a suction-cup-attached video-imaging tag (crittercam) |
publishDate |
2008 |
url |
http://www.dtic.mil/docs/citations/ADA588204 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA588204 |
genre |
Blue whale |
genre_facet |
Blue whale |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA588204 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766379534707326976 |