Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA
Three killer whale Orcinus orca ecotypes inhabit the northeastern Pacific: residents, transients, and offshores. To investigate intraspecific differences in spatial and temporal occur - rence off the outer coast of Washington State, USA, 2 long-term acoustic recorders were deployed from July 2004 to...
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ftcdlib:oai:escholarship.org:ark:/13030/qt85c6q624 2024-01-07T09:44:37+01:00 Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA Rice, A Deecke, VB Ford, JKB Pilkington, JF Oleson, EM Hildebrand, JA Širović, A 2017-05-31 https://escholarship.org/uc/item/85c6q624 unknown eScholarship, University of California qt85c6q624 https://escholarship.org/uc/item/85c6q624 CC-BY Environmental Sciences Biological Sciences Ecology Orcinus orca Seasonality Prey preferences Passive acoustic monitoring Northeastern Pacific Oceanography Zoology Marine Biology & Hydrobiology Ecological applications article 2017 ftcdlib 2023-12-11T19:07:42Z Three killer whale Orcinus orca ecotypes inhabit the northeastern Pacific: residents, transients, and offshores. To investigate intraspecific differences in spatial and temporal occur - rence off the outer coast of Washington State, USA, 2 long-term acoustic recorders were deployed from July 2004 to August 2013: one off the continental shelf in Quinault Canyon (QC) and the other on the shelf, off Cape Elizabeth (CE). Acoustic encounters containing pulsed calls were analyzed for call types attributable to specific ecotypes, as no calls are shared between ecotypes. Both sites showed killer whale presence year-round, although site CE had a higher number of days with encounters overall. Transients were the most common ecotype at both sites and were encountered mainly during the spring and early summer. Residents were encountered primarily at site CE and showed potential seasonal segregation between the 2 resident communities, with northern residents present mainly during summer and early fall when southern residents were not encountered. Offshore encounters were higher at site QC, with little evidence for seasonality. Spatial and temporal variability of residents and transients matches the distribution of their prey and can potentially be used for further inferences about prey preferences for different transient groups. Article in Journal/Newspaper Killer Whale Orca Orcinus orca Killer whale University of California: eScholarship Pacific |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Environmental Sciences Biological Sciences Ecology Orcinus orca Seasonality Prey preferences Passive acoustic monitoring Northeastern Pacific Oceanography Zoology Marine Biology & Hydrobiology Ecological applications |
spellingShingle |
Environmental Sciences Biological Sciences Ecology Orcinus orca Seasonality Prey preferences Passive acoustic monitoring Northeastern Pacific Oceanography Zoology Marine Biology & Hydrobiology Ecological applications Rice, A Deecke, VB Ford, JKB Pilkington, JF Oleson, EM Hildebrand, JA Širović, A Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
topic_facet |
Environmental Sciences Biological Sciences Ecology Orcinus orca Seasonality Prey preferences Passive acoustic monitoring Northeastern Pacific Oceanography Zoology Marine Biology & Hydrobiology Ecological applications |
description |
Three killer whale Orcinus orca ecotypes inhabit the northeastern Pacific: residents, transients, and offshores. To investigate intraspecific differences in spatial and temporal occur - rence off the outer coast of Washington State, USA, 2 long-term acoustic recorders were deployed from July 2004 to August 2013: one off the continental shelf in Quinault Canyon (QC) and the other on the shelf, off Cape Elizabeth (CE). Acoustic encounters containing pulsed calls were analyzed for call types attributable to specific ecotypes, as no calls are shared between ecotypes. Both sites showed killer whale presence year-round, although site CE had a higher number of days with encounters overall. Transients were the most common ecotype at both sites and were encountered mainly during the spring and early summer. Residents were encountered primarily at site CE and showed potential seasonal segregation between the 2 resident communities, with northern residents present mainly during summer and early fall when southern residents were not encountered. Offshore encounters were higher at site QC, with little evidence for seasonality. Spatial and temporal variability of residents and transients matches the distribution of their prey and can potentially be used for further inferences about prey preferences for different transient groups. |
format |
Article in Journal/Newspaper |
author |
Rice, A Deecke, VB Ford, JKB Pilkington, JF Oleson, EM Hildebrand, JA Širović, A |
author_facet |
Rice, A Deecke, VB Ford, JKB Pilkington, JF Oleson, EM Hildebrand, JA Širović, A |
author_sort |
Rice, A |
title |
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
title_short |
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
title_full |
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
title_fullStr |
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
title_full_unstemmed |
Spatial and temporal occurrence of killer whale ecotypes off the outer coast of Washington State, USA |
title_sort |
spatial and temporal occurrence of killer whale ecotypes off the outer coast of washington state, usa |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
https://escholarship.org/uc/item/85c6q624 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_relation |
qt85c6q624 https://escholarship.org/uc/item/85c6q624 |
op_rights |
CC-BY |
_version_ |
1787426021054611456 |