Graded call variation in male Asian cricket frogs (Rana nicobariensis)

Jehle, R ORCID: and Arak, A 1998, 'Graded call variation in male Asian cricket frogs (Rana nicobariensis)' , Bioacoustics, 9 , pp. 35-48.

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We describe the vocal repertoire of the Asian cricket frog Rana nicobariensis for the first time. Three structurally-distinct call types exist: advertisement calls, aggressive calls and encounter calls. Compound calls consisting of both advertisement and aggressive elements were also recorded. A remarkable feature of communication in this species is the highly variable advertisement call which shows a 20-fold variation in duration, comprising 1-25 notes. In natural choruses, the duration of the advertisement call is inversely related to the distance between a focal male and its closest calling neighbour. In playback experiments, males clearly responded to stimuli containing different numbers of notes by adjusting the number of notes emitted. However, they did not match the stimulus precisely, and were inhibited from calling by a stimulus consisting of a continuous train of notes. Different proportions of each call type were recorded during playbacks at different distances; aggressive and encounter calls were increasingly emitted at closer distances. Our results suggest that a graded communication system has evolved in Rana nicobariensis, in which the best call for a male to use at any moment depends on the type of calls being emitted by other males in the chorus.

Item Type: Article
Themes: Subjects / Themes > Q Science > QL Zoology
Subjects / Themes > Q Science > QH Natural history > QH301 Biology
Subjects outside of the University Themes
Schools: Schools > School of Environment and Life Sciences
Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Bioacoustics
Publisher: A B Academic Publishers
Refereed: Yes
ISSN: 0952-4622
Depositing User: Users 29196 not found.
Date Deposited: 30 Oct 2009 15:07
Last Modified: 27 Aug 2021 22:10

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