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Call type repertoire of killer whales (Orcinus orca) in Iceland and its variation across regions

Call type repertoire of killer whales (Orcinus orca) in Iceland and its variation across regions


Title: Call type repertoire of killer whales (Orcinus orca) in Iceland and its variation across regions
Author: Selbmann, Anna
Deecke, Volker B.
Filatova, Olga A.
Fedutin, Ivan D.
Miller, Patrick J.O.
Simon, Malene
Bowles, Ann E.
Lyrholm, Thomas
Lacey, Claire
Magnúsdóttir, Edda E.
... 4 more authors Show all authors
Date: 2023-10
Language: English
Scope: 25
University/Institute: University of Iceland
Department: Faculty of Life and Environmental Sciences
Faculty of Subject Teacher Education
Series: Marine Mammal Science; 39(4)
ISSN: 0824-0469
DOI: 10.1111/mms.13039
Subject: acoustic behavior; call repertoire; geographic variation; Northeast Atlantic; passive acoustic monitoring; Ecology, Evolution, Behavior and Systematics; Aquatic Science
URI: https://hdl.handle.net/20.500.11815/5152

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Citation:

Selbmann , A , Deecke , V B , Filatova , O A , Fedutin , I D , Miller , P J O , Simon , M , Bowles , A E , Lyrholm , T , Lacey , C , Magnúsdóttir , E E , Maunder , W , Wensveen , P J , Svavarsson , J & Samarra , F I P 2023 , ' Call type repertoire of killer whales (Orcinus orca) in Iceland and its variation across regions ' , Marine Mammal Science , vol. 39 , no. 4 , pp. 1136-1160 . https://doi.org/10.1111/mms.13039

Abstract:

Killer whales (Orcinus orca) have group-specific call repertoires that can be used to track groups and populations using passive acoustic monitoring. To provide a detailed description of the Icelandic killer whale repertoire and its variation, we analyzed acoustic data collected in five locations between 1985 and 2016. Calls were classified manually, and CART and random forest analyses were employed to validate the manual classification. A total of 91 call categories (including call types and subtypes) were defined. Most call categories were recorded in more than one location, with the highest proportion shared between herring grounds in Vestmannaeyjar (South) and Breiðafjörður (West). However, both locations included call categories that were not recorded elsewhere in Iceland. Recordings from past herring wintering grounds in eastern Iceland included few call categories that matched other locations. Sample sizes from Reykjanes (Southwest) and Skjálfandi (North) were small and did not include unique call categories. The relative occurrence of call categories in Vestmannaeyjar changed little over a 14-year period (2002–2016), although shorter-term changes between years were observed that appeared to correlate to changes in individuals identified. This comparison of acoustic repertoires provides valuable information on the social structure and movement patterns of herring-eating killer whales around Iceland.

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Publisher Copyright: © 2023 The Authors. Marine Mammal Science published by Wiley Periodicals LLC on behalf of Society for Marine Mammalogy.

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