Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure
Bigg’s killer whales ( Orcinus orca; i.e. ‘transient’ ecotype), as apex predators, are important to the dynamics of marine ecosystems, but little is known about their population structure in western Alaska. Currently, all Bigg’s killer whales in western Alaska are ascribed to a single broad stock fo...
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ftdatacite:10.6084/m9.figshare.5572984 2023-05-15T17:03:27+02:00 Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure Sharpe, Deborah L. Castellote, Manuel Wade, Paul R. Cornick, Leslie A. 2017 https://dx.doi.org/10.6084/m9.figshare.5572984 https://tandf.figshare.com/articles/dataset/Call_types_of_Bigg_s_killer_whales_i_Orcinus_orca_i_in_western_Alaska_using_vocal_dialects_to_assess_population_structure/5572984 unknown Taylor & Francis https://dx.doi.org/10.1080/09524622.2017.1396562 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Cell Biology Genetics FOS Biological sciences Molecular Biology Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences dataset Dataset 2017 ftdatacite https://doi.org/10.6084/m9.figshare.5572984 https://doi.org/10.1080/09524622.2017.1396562 2021-11-05T12:55:41Z Bigg’s killer whales ( Orcinus orca; i.e. ‘transient’ ecotype), as apex predators, are important to the dynamics of marine ecosystems, but little is known about their population structure in western Alaska. Currently, all Bigg’s killer whales in western Alaska are ascribed to a single broad stock for management under the US Marine Mammal Protection Act. However, recent nuclear microsatellite and mitochondrial DNA analyses indicate that this stock is likely comprised of genetically distinct sub-populations. In accordance with what is known about killer whale vocal dialects in other locations, we used the spatial distribution of group-specific call types to investigate the population structure of Bigg’s killer whales in this part of Alaska. Digital audio recordings were collected from 33 Bigg’s killer whale encounters throughout the Aleutian and Pribilof Islands in the summers of 2001–2007 and 2009–2010. Recorded calls were qualitatively classified into discrete types and then quantitatively described using 12 structural and time-frequency measures. Resulting call categories were validated using a random forest approach. A total of 36 call types and subtypes were identified across the entire study area, and regional patterns of call type use revealed three distinct dialects which correspond to proposed genetic delineations. Our results suggest that there are at least three acoustically and genetically distinct sub-populations in western Alaska, and we present an initial catalogue for this area describing the regional vocal repertoires of Bigg’s killer whale call types. Dataset Killer Whale Orca Orcinus orca Alaska Killer whale DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Cell Biology Genetics FOS Biological sciences Molecular Biology Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Cell Biology Genetics FOS Biological sciences Molecular Biology Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences Sharpe, Deborah L. Castellote, Manuel Wade, Paul R. Cornick, Leslie A. Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
topic_facet |
Cell Biology Genetics FOS Biological sciences Molecular Biology Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology 69999 Biological Sciences not elsewhere classified Inorganic Chemistry FOS Chemical sciences |
description |
Bigg’s killer whales ( Orcinus orca; i.e. ‘transient’ ecotype), as apex predators, are important to the dynamics of marine ecosystems, but little is known about their population structure in western Alaska. Currently, all Bigg’s killer whales in western Alaska are ascribed to a single broad stock for management under the US Marine Mammal Protection Act. However, recent nuclear microsatellite and mitochondrial DNA analyses indicate that this stock is likely comprised of genetically distinct sub-populations. In accordance with what is known about killer whale vocal dialects in other locations, we used the spatial distribution of group-specific call types to investigate the population structure of Bigg’s killer whales in this part of Alaska. Digital audio recordings were collected from 33 Bigg’s killer whale encounters throughout the Aleutian and Pribilof Islands in the summers of 2001–2007 and 2009–2010. Recorded calls were qualitatively classified into discrete types and then quantitatively described using 12 structural and time-frequency measures. Resulting call categories were validated using a random forest approach. A total of 36 call types and subtypes were identified across the entire study area, and regional patterns of call type use revealed three distinct dialects which correspond to proposed genetic delineations. Our results suggest that there are at least three acoustically and genetically distinct sub-populations in western Alaska, and we present an initial catalogue for this area describing the regional vocal repertoires of Bigg’s killer whale call types. |
format |
Dataset |
author |
Sharpe, Deborah L. Castellote, Manuel Wade, Paul R. Cornick, Leslie A. |
author_facet |
Sharpe, Deborah L. Castellote, Manuel Wade, Paul R. Cornick, Leslie A. |
author_sort |
Sharpe, Deborah L. |
title |
Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
title_short |
Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
title_full |
Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
title_fullStr |
Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
title_full_unstemmed |
Call types of Bigg’s killer whales ( Orcinus orca ) in western Alaska: using vocal dialects to assess population structure |
title_sort |
call types of bigg’s killer whales ( orcinus orca ) in western alaska: using vocal dialects to assess population structure |
publisher |
Taylor & Francis |
publishDate |
2017 |
url |
https://dx.doi.org/10.6084/m9.figshare.5572984 https://tandf.figshare.com/articles/dataset/Call_types_of_Bigg_s_killer_whales_i_Orcinus_orca_i_in_western_Alaska_using_vocal_dialects_to_assess_population_structure/5572984 |
genre |
Killer Whale Orca Orcinus orca Alaska Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Alaska Killer whale |
op_relation |
https://dx.doi.org/10.1080/09524622.2017.1396562 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.5572984 https://doi.org/10.1080/09524622.2017.1396562 |
_version_ |
1766057334260367360 |