The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area
Little is known about the occurrence of cetaceans found in offshore waters in the Gulf of Alaska; however, whaling records and a few recent surveys have shown this area to be important habitat. The United States Navy maintains a maritime training area in the central Gulf of Alaska, east of Kodiak Is...
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ftdtic:ADA549653 2023-05-15T17:04:40+02:00 The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area Rone, Brenda K Douglas, Annie B Clapham, Phil Martinez, Anthony Morse, Laura J Zerbini, Alexandre N Calambokidis, John CASCADIA RESEARCH COLLECTIVE OLYMPIA WA 2009-10 text/html http://www.dtic.mil/docs/citations/ADA549653 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA549653 en eng http://www.dtic.mil/docs/citations/ADA549653 Approved for public release; distribution is unlimited. DTIC Biology Military Operations Strategy and Tactics *AQUATIC ANIMALS *NAVAL TRAINING ACOUSTICS DETECTION INSHORE AREAS OFFSHORE PHOTOGRAPHS RECORDING SYSTEMS SURVEYS VISION Text 2009 ftdtic 2016-02-23T09:18:50Z Little is known about the occurrence of cetaceans found in offshore waters in the Gulf of Alaska; however, whaling records and a few recent surveys have shown this area to be important habitat. The United States Navy maintains a maritime training area in the central Gulf of Alaska, east of Kodiak Island, and has requested additional information on marine mammal presence and use of this area. To determine the occurrence and distribution of marine mammals in and around the Navy training area, a line-transect visual and acoustic survey was conducted 10-20 April 2009 from the NOAA R/V Oscar Dyson. The primary survey area encompassed nearshore, shelf and offshore pelagic waters of the central Gulf of Alaska. Survey lines were designed to provide equal coverage of the nearshore and offshore habitat. During this project, the visual survey covered a total of 760 kilometers (410 nautical miles) on-effort while transit and fog effort legs accounted for 553 km (298 nm). There were a total of 96 sightings (453 individuals) of 11 confirmed marine mammal species; these included fin, humpback, gray, and minke whales as well as killer whales, Dall s and harbor porpoise, Pacific white-sided dolphins and Steller sea lions, harbor seals and sea otters. Additionally, there were 36 sightings (46 individuals) of unidentified large whales, dolphins and pinnipeds. Acoustically, operations were conducted 24-hours/day surveying a total of 3,519 km (1,900 nm) and recording 49 acoustic detections of sperm whales and killer whales. Photographs of nineteen individual killer whales and four fin whales were obtained on this cruise and compared to existing catalogs. Text Kodiak Alaska Defense Technical Information Center: DTIC Technical Reports database Gulf of Alaska Pacific |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Biology Military Operations Strategy and Tactics *AQUATIC ANIMALS *NAVAL TRAINING ACOUSTICS DETECTION INSHORE AREAS OFFSHORE PHOTOGRAPHS RECORDING SYSTEMS SURVEYS VISION |
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Biology Military Operations Strategy and Tactics *AQUATIC ANIMALS *NAVAL TRAINING ACOUSTICS DETECTION INSHORE AREAS OFFSHORE PHOTOGRAPHS RECORDING SYSTEMS SURVEYS VISION Rone, Brenda K Douglas, Annie B Clapham, Phil Martinez, Anthony Morse, Laura J Zerbini, Alexandre N Calambokidis, John The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
topic_facet |
Biology Military Operations Strategy and Tactics *AQUATIC ANIMALS *NAVAL TRAINING ACOUSTICS DETECTION INSHORE AREAS OFFSHORE PHOTOGRAPHS RECORDING SYSTEMS SURVEYS VISION |
description |
Little is known about the occurrence of cetaceans found in offshore waters in the Gulf of Alaska; however, whaling records and a few recent surveys have shown this area to be important habitat. The United States Navy maintains a maritime training area in the central Gulf of Alaska, east of Kodiak Island, and has requested additional information on marine mammal presence and use of this area. To determine the occurrence and distribution of marine mammals in and around the Navy training area, a line-transect visual and acoustic survey was conducted 10-20 April 2009 from the NOAA R/V Oscar Dyson. The primary survey area encompassed nearshore, shelf and offshore pelagic waters of the central Gulf of Alaska. Survey lines were designed to provide equal coverage of the nearshore and offshore habitat. During this project, the visual survey covered a total of 760 kilometers (410 nautical miles) on-effort while transit and fog effort legs accounted for 553 km (298 nm). There were a total of 96 sightings (453 individuals) of 11 confirmed marine mammal species; these included fin, humpback, gray, and minke whales as well as killer whales, Dall s and harbor porpoise, Pacific white-sided dolphins and Steller sea lions, harbor seals and sea otters. Additionally, there were 36 sightings (46 individuals) of unidentified large whales, dolphins and pinnipeds. Acoustically, operations were conducted 24-hours/day surveying a total of 3,519 km (1,900 nm) and recording 49 acoustic detections of sperm whales and killer whales. Photographs of nineteen individual killer whales and four fin whales were obtained on this cruise and compared to existing catalogs. |
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CASCADIA RESEARCH COLLECTIVE OLYMPIA WA |
format |
Text |
author |
Rone, Brenda K Douglas, Annie B Clapham, Phil Martinez, Anthony Morse, Laura J Zerbini, Alexandre N Calambokidis, John |
author_facet |
Rone, Brenda K Douglas, Annie B Clapham, Phil Martinez, Anthony Morse, Laura J Zerbini, Alexandre N Calambokidis, John |
author_sort |
Rone, Brenda K |
title |
The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
title_short |
The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
title_full |
The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
title_fullStr |
The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
title_full_unstemmed |
The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
title_sort |
april 2009 gulf of alaska line-transect survey (goals) in the navy training exercise area |
publishDate |
2009 |
url |
http://www.dtic.mil/docs/citations/ADA549653 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA549653 |
geographic |
Gulf of Alaska Pacific |
geographic_facet |
Gulf of Alaska Pacific |
genre |
Kodiak Alaska |
genre_facet |
Kodiak Alaska |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA549653 |
op_rights |
Approved for public release; distribution is unlimited. |
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