Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska
From 2001 to 2004 in the eastern Aleutian Islands, Alaska,killer whales (Orcinus orca) were encountered 250 times during 421 days of surveys that covered a total of 22,491 miles. Three killer whale groups (resident, transient, and offshore) were identified acoustically and genetically. Resident kill...
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ftoceandocs:oai:aquadocs.org:1834/25551 2023-05-15T17:03:35+02:00 Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska Matkin, Craig O. Barrett-Lennard, Lance G. Yurk, Harald Ellifrit, David Trites, Andrew W. 2007 application/pdf 74-87 http://hdl.handle.net/1834/25551 en eng http://fishbull.noaa.gov/1051/matkin.pdf 0090-0656 http://hdl.handle.net/1834/25551 http://aquaticcommons.org/id/eprint/8907 403 2012-06-18 09:30:42 8907 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2007 ftoceandocs 2023-04-06T17:02:55Z From 2001 to 2004 in the eastern Aleutian Islands, Alaska,killer whales (Orcinus orca) were encountered 250 times during 421 days of surveys that covered a total of 22,491 miles. Three killer whale groups (resident, transient, and offshore) were identified acoustically and genetically. Resident killer whales were found 12 times more frequentlythan transient killer whales, and offshore killer whales were encountered only once. A minimum of 901photographically identified resident whales used the region during our study. A total of 165 mammal-eating transient killer whales were identified, and the majority (70%) wereencountered during spring (May and June). The diet of transient killer whales in spring was primarily gray whales (Eschrichtius robustus), and in summer primarily northern fur seals (Callorhinus ursinus). Steller sea lions (Eumetopias jubatus) did not appear to be a preferred prey or major prey item during spring and summer. The majority of killer whales in the eastern Aleutian Islands are the resident ecotype, which does not consume marine mammals. Article in Journal/Newspaper Killer Whale Orca Orcinus orca Alaska Aleutian Islands Callorhinus ursinus Killer whale IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
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Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries |
spellingShingle |
Biology Ecology Fisheries Matkin, Craig O. Barrett-Lennard, Lance G. Yurk, Harald Ellifrit, David Trites, Andrew W. Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
topic_facet |
Biology Ecology Fisheries |
description |
From 2001 to 2004 in the eastern Aleutian Islands, Alaska,killer whales (Orcinus orca) were encountered 250 times during 421 days of surveys that covered a total of 22,491 miles. Three killer whale groups (resident, transient, and offshore) were identified acoustically and genetically. Resident killer whales were found 12 times more frequentlythan transient killer whales, and offshore killer whales were encountered only once. A minimum of 901photographically identified resident whales used the region during our study. A total of 165 mammal-eating transient killer whales were identified, and the majority (70%) wereencountered during spring (May and June). The diet of transient killer whales in spring was primarily gray whales (Eschrichtius robustus), and in summer primarily northern fur seals (Callorhinus ursinus). Steller sea lions (Eumetopias jubatus) did not appear to be a preferred prey or major prey item during spring and summer. The majority of killer whales in the eastern Aleutian Islands are the resident ecotype, which does not consume marine mammals. |
format |
Article in Journal/Newspaper |
author |
Matkin, Craig O. Barrett-Lennard, Lance G. Yurk, Harald Ellifrit, David Trites, Andrew W. |
author_facet |
Matkin, Craig O. Barrett-Lennard, Lance G. Yurk, Harald Ellifrit, David Trites, Andrew W. |
author_sort |
Matkin, Craig O. |
title |
Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
title_short |
Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
title_full |
Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
title_fullStr |
Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
title_full_unstemmed |
Ecotypic variation and predatory behavior among killer whales (Orcinus orca) off the eastern Aleutian Islands, Alaska |
title_sort |
ecotypic variation and predatory behavior among killer whales (orcinus orca) off the eastern aleutian islands, alaska |
publishDate |
2007 |
url |
http://hdl.handle.net/1834/25551 |
genre |
Killer Whale Orca Orcinus orca Alaska Aleutian Islands Callorhinus ursinus Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Alaska Aleutian Islands Callorhinus ursinus Killer whale |
op_source |
http://aquaticcommons.org/id/eprint/8907 403 2012-06-18 09:30:42 8907 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1051/matkin.pdf 0090-0656 http://hdl.handle.net/1834/25551 |
_version_ |
1766057481474146304 |