Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/21930
Title: Noisy neighbours at the frog pond: effects of invasive cane toads on the calling behaviour of native Australian frogs
Contributor(s): Bleach, Iris T (author); Beckmann, Christa (author)orcid ; Both, Camila (author); Brown, Gregory P (author); Shine, Richard (author)
Publication Date: 2015
DOI: 10.1007/s00265-015-1879-z
Handle Link: https://hdl.handle.net/1959.11/21930
Abstract: Invasive species can disrupt the communication systems that native biota use for reproductive interactions. In tropical Australia, invasive cane toads (Rhinella marina) breed in many of the same waterbodies that are used by native frogs, and males of both the invader and the native taxa rely on vocal signals to attract mates. We conducted playback experiments to test the hypothesis that calls of toads may influence the calling behaviour of frogs (Limnodynastes convexiusculus and Litoria rothii). Male L. convexiusculus adjusted their calling rate and the variance in inter-call interval in response to a variety of sounds, including the calls of cane toads as well as those of other native frog species, and other anthropogenic noise, whereas L. rothii did not. Within the stimulus periods of playbacks, male L. convexiusculus called more intensely during long silent gaps than during calling blocks. Thus, males of one frog species reduced their calling rate, possibly to minimise energy expenditure during periods of acoustic interference generated by cane toads. In spite of such modifications, the number of overlapping calls (within stimulus periods) did not differ significantly from that expected by chance. In natural conditions, the calls of cane toads are continuous rather than episodic, leaving fewer gaps of silence that male frogs could exploit. Future work could usefully quantify the magnitude of temporal (e.g. diel and seasonal) and spatial overlap between calling by toads and by frogs and the impact of call-structure shifts on the ability of male frogs to attract receptive females.
Publication Type: Journal Article
Source of Publication: Behavioral Ecology and Sociobiology, 69(4), p. 675-683
Publisher: Springer-Verlag Berlin Heidelberg
Place of Publication: Germany
ISSN: 1432-0762
0340-5443
Field of Research (FOR): 060201 Behavioural Ecology
060801 Animal Behaviour
060809 Vertebrate Biology
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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