A temporal rule in vocal exchange among Large-billed Crows Corvus macrorhynchos in Japan

Noriko Kondo, Shigeru Watanabe, Eiichi Izawa

研究成果: Article

8 引用 (Scopus)

抄録

We investigated whether vocal communication in wild Large-billed Crows (Corvus macrorhynchos) is governed by a temporal rule as an evidence for vocal exchange. In order to examine this potential temporal rule, we analyzed the intervals between two single-note ka calls produced sequentially by two crows in gregarious situations. Two different individuals sequentially uttered ka calls at approximately 0.2-0.8-sec intervals. Such a specific time window was not observed in a simulation of 'imaginary' flocks, in which multiple crows independently emitted ka calls at their own pace, similar to the calls of solitary crows in the wild. These results suggest that the specific time window of inter-call intervals between different crows is not an incidental phenomenon in a crowded situation, but rather a specific event that follows a temporal rule organizing vocal communication of two crows. Our findings provide the first evidence of vocal exchange using ka calls that are organized following a precise temporal pattern in Large-billed Crows.

元の言語English
ページ(範囲)83-91
ページ数9
ジャーナルOrnithological Science
9
発行部数1
DOI
出版物ステータスPublished - 2010

Fingerprint

Corvus
crows
Japan
animal communication
flocks

ASJC Scopus subject areas

  • Animal Science and Zoology

これを引用

A temporal rule in vocal exchange among Large-billed Crows Corvus macrorhynchos in Japan. / Kondo, Noriko; Watanabe, Shigeru; Izawa, Eiichi.

:: Ornithological Science, 巻 9, 番号 1, 2010, p. 83-91.

研究成果: Article

@article{f341b8c89dc6407f9b3f885ea4c64b57,
title = "A temporal rule in vocal exchange among Large-billed Crows Corvus macrorhynchos in Japan",
abstract = "We investigated whether vocal communication in wild Large-billed Crows (Corvus macrorhynchos) is governed by a temporal rule as an evidence for vocal exchange. In order to examine this potential temporal rule, we analyzed the intervals between two single-note ka calls produced sequentially by two crows in gregarious situations. Two different individuals sequentially uttered ka calls at approximately 0.2-0.8-sec intervals. Such a specific time window was not observed in a simulation of 'imaginary' flocks, in which multiple crows independently emitted ka calls at their own pace, similar to the calls of solitary crows in the wild. These results suggest that the specific time window of inter-call intervals between different crows is not an incidental phenomenon in a crowded situation, but rather a specific event that follows a temporal rule organizing vocal communication of two crows. Our findings provide the first evidence of vocal exchange using ka calls that are organized following a precise temporal pattern in Large-billed Crows.",
keywords = "Contact call, Corvid, Crow, Vocal communication, Vocal exchange",
author = "Noriko Kondo and Shigeru Watanabe and Eiichi Izawa",
year = "2010",
doi = "10.2326/osj.9.83",
language = "English",
volume = "9",
pages = "83--91",
journal = "Ornithological Science",
issn = "1347-0558",
publisher = "Ornithological Society of Japan",
number = "1",

}

TY - JOUR

T1 - A temporal rule in vocal exchange among Large-billed Crows Corvus macrorhynchos in Japan

AU - Kondo, Noriko

AU - Watanabe, Shigeru

AU - Izawa, Eiichi

PY - 2010

Y1 - 2010

N2 - We investigated whether vocal communication in wild Large-billed Crows (Corvus macrorhynchos) is governed by a temporal rule as an evidence for vocal exchange. In order to examine this potential temporal rule, we analyzed the intervals between two single-note ka calls produced sequentially by two crows in gregarious situations. Two different individuals sequentially uttered ka calls at approximately 0.2-0.8-sec intervals. Such a specific time window was not observed in a simulation of 'imaginary' flocks, in which multiple crows independently emitted ka calls at their own pace, similar to the calls of solitary crows in the wild. These results suggest that the specific time window of inter-call intervals between different crows is not an incidental phenomenon in a crowded situation, but rather a specific event that follows a temporal rule organizing vocal communication of two crows. Our findings provide the first evidence of vocal exchange using ka calls that are organized following a precise temporal pattern in Large-billed Crows.

AB - We investigated whether vocal communication in wild Large-billed Crows (Corvus macrorhynchos) is governed by a temporal rule as an evidence for vocal exchange. In order to examine this potential temporal rule, we analyzed the intervals between two single-note ka calls produced sequentially by two crows in gregarious situations. Two different individuals sequentially uttered ka calls at approximately 0.2-0.8-sec intervals. Such a specific time window was not observed in a simulation of 'imaginary' flocks, in which multiple crows independently emitted ka calls at their own pace, similar to the calls of solitary crows in the wild. These results suggest that the specific time window of inter-call intervals between different crows is not an incidental phenomenon in a crowded situation, but rather a specific event that follows a temporal rule organizing vocal communication of two crows. Our findings provide the first evidence of vocal exchange using ka calls that are organized following a precise temporal pattern in Large-billed Crows.

KW - Contact call

KW - Corvid

KW - Crow

KW - Vocal communication

KW - Vocal exchange

UR - http://www.scopus.com/inward/record.url?scp=84876299578&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876299578&partnerID=8YFLogxK

U2 - 10.2326/osj.9.83

DO - 10.2326/osj.9.83

M3 - Article

AN - SCOPUS:84876299578

VL - 9

SP - 83

EP - 91

JO - Ornithological Science

JF - Ornithological Science

SN - 1347-0558

IS - 1

ER -