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Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations

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Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations. / Shapiro, Ari Daniel; Tyack, Peter L.; Seneff, Stephanie.

In: Animal Behaviour, Vol. 81, No. 2, 02.2011, p. 377-386.

Research output: Contribution to journalArticle

Harvard

Shapiro, AD, Tyack, PL & Seneff, S 2011, 'Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations', Animal Behaviour, vol. 81, no. 2, pp. 377-386. https://doi.org/10.1016/j.anbehav.2010.09.020

APA

Shapiro, A. D., Tyack, P. L., & Seneff, S. (2011). Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations. Animal Behaviour, 81(2), 377-386. https://doi.org/10.1016/j.anbehav.2010.09.020

Vancouver

Shapiro AD, Tyack PL, Seneff S. Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations. Animal Behaviour. 2011 Feb;81(2):377-386. https://doi.org/10.1016/j.anbehav.2010.09.020

Author

Shapiro, Ari Daniel ; Tyack, Peter L. ; Seneff, Stephanie. / Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations. In: Animal Behaviour. 2011 ; Vol. 81, No. 2. pp. 377-386.

Bibtex - Download

@article{df555db9cdd143e4a933e47221c6d8f7,
title = "Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations",
abstract = "Students of animal communication face significant challenges when deciding how to categorize calls into subunits, calls and call series. Here, we use algorithms designed to parse human speech to test different approaches for categorizing calls of killer whales. Killer whale vocalizations have traditionally been categorized by humans into discrete call types. These calls often contain internal spectral shifts, periods of silence and synchronously produced low-and high-frequency components, suggesting that they may be composed of subunits. We describe and compare three different approaches for modelling Norwegian killer whale calls. The first method considered the whole call as the basic unit of analysis. Inspired by human speech-processing techniques, the second and third methods represented the calls in terms of subunits. Subunits may provide a more parsimonious approach to modelling the vocal stream of Norwegian killer whale calls since (1) there were fewer subunits than call types and (2) nearly 75{\%} of all call types shared at least one subunit. We show that contour traces from stereotyped Norwegian killer whale calls yielded similar automatic classification performance using either whole calls or subunits. We also demonstrate that subunits derived from Norwegian stereotyped calls were detected in some Norwegian variable (nonstereotyped) calls as well as the stereotyped calls of other killer whale populations. Further work is required to test whether killer whales use subunits to generate and categorize their vocal repertoire. 2010 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd.",
keywords = "call type, killer whale, subunit, vocalization, FINCH TAENIOPYGIA-GUTTATA, ZEBRA FINCH, BRITISH-COLUMBIA, SONG, SPEECH, COMMUNICATION, ORGANIZATION, INFORMATION, MECHANISMS, GENERATION",
author = "Shapiro, {Ari Daniel} and Tyack, {Peter L.} and Stephanie Seneff",
year = "2011",
month = "2",
doi = "10.1016/j.anbehav.2010.09.020",
language = "English",
volume = "81",
pages = "377--386",
journal = "Animal Behaviour",
issn = "0003-3472",
publisher = "ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD",
number = "2",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Comparing call-based versus subunit-based methods for categorizing Norwegian killer whale, Orcinus orca, vocalizations

AU - Shapiro, Ari Daniel

AU - Tyack, Peter L.

AU - Seneff, Stephanie

PY - 2011/2

Y1 - 2011/2

N2 - Students of animal communication face significant challenges when deciding how to categorize calls into subunits, calls and call series. Here, we use algorithms designed to parse human speech to test different approaches for categorizing calls of killer whales. Killer whale vocalizations have traditionally been categorized by humans into discrete call types. These calls often contain internal spectral shifts, periods of silence and synchronously produced low-and high-frequency components, suggesting that they may be composed of subunits. We describe and compare three different approaches for modelling Norwegian killer whale calls. The first method considered the whole call as the basic unit of analysis. Inspired by human speech-processing techniques, the second and third methods represented the calls in terms of subunits. Subunits may provide a more parsimonious approach to modelling the vocal stream of Norwegian killer whale calls since (1) there were fewer subunits than call types and (2) nearly 75% of all call types shared at least one subunit. We show that contour traces from stereotyped Norwegian killer whale calls yielded similar automatic classification performance using either whole calls or subunits. We also demonstrate that subunits derived from Norwegian stereotyped calls were detected in some Norwegian variable (nonstereotyped) calls as well as the stereotyped calls of other killer whale populations. Further work is required to test whether killer whales use subunits to generate and categorize their vocal repertoire. 2010 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd.

AB - Students of animal communication face significant challenges when deciding how to categorize calls into subunits, calls and call series. Here, we use algorithms designed to parse human speech to test different approaches for categorizing calls of killer whales. Killer whale vocalizations have traditionally been categorized by humans into discrete call types. These calls often contain internal spectral shifts, periods of silence and synchronously produced low-and high-frequency components, suggesting that they may be composed of subunits. We describe and compare three different approaches for modelling Norwegian killer whale calls. The first method considered the whole call as the basic unit of analysis. Inspired by human speech-processing techniques, the second and third methods represented the calls in terms of subunits. Subunits may provide a more parsimonious approach to modelling the vocal stream of Norwegian killer whale calls since (1) there were fewer subunits than call types and (2) nearly 75% of all call types shared at least one subunit. We show that contour traces from stereotyped Norwegian killer whale calls yielded similar automatic classification performance using either whole calls or subunits. We also demonstrate that subunits derived from Norwegian stereotyped calls were detected in some Norwegian variable (nonstereotyped) calls as well as the stereotyped calls of other killer whale populations. Further work is required to test whether killer whales use subunits to generate and categorize their vocal repertoire. 2010 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd.

KW - call type

KW - killer whale

KW - subunit

KW - vocalization

KW - FINCH TAENIOPYGIA-GUTTATA

KW - ZEBRA FINCH

KW - BRITISH-COLUMBIA

KW - SONG

KW - SPEECH

KW - COMMUNICATION

KW - ORGANIZATION

KW - INFORMATION

KW - MECHANISMS

KW - GENERATION

U2 - 10.1016/j.anbehav.2010.09.020

DO - 10.1016/j.anbehav.2010.09.020

M3 - Article

VL - 81

SP - 377

EP - 386

JO - Animal Behaviour

JF - Animal Behaviour

SN - 0003-3472

IS - 2

ER -

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