Heterospecific Vocal Interactions in a Frog from the Southern Temperate Forest, <i>Batrachyla taeniata</i>

Penna, Mario; Velásquez, Nelson

doi:10.1111/j.1439-0310.2010.01847.x

Cited by 16 publications

(36 citation statements)

References 37 publications

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“…In addition, males from Totoral and Los Maitenes gave strong vocal responses to the standard synthetic call of each other population as well. Similar responses for stimuli having a structure resembling own calls have been reported in comparisons among different species [40] [41] and in studies using stimuli for which different parameters are varied systematically [42]. In remarkable contrast, males of the Osorno population responded with higher number of pulses and on-off ratio to the standard call of Totoral, relative to the local standard stimulus.…”

Section: Discussionsupporting

confidence: 70%

“…A similar condition has been described in male Geospiza finches which show strong vocal responses to the local call types as compared to calls of conspecific males from foreign islands [44] [45] [46]. Preferences in vocal responses of this kind but for conspecific relative to heterospecific signals have also been shown to occur in anurans [40] [41].…”

Section: Discussionsupporting

confidence: 68%

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Divergence of Acoustic Signals in a Widely Distributed Frog: Relevance of Inter-Male Interactions

et al. 2014

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Divergence of acoustic signals in a geographic scale results from diverse evolutionary forces acting in parallel and affecting directly inter-male vocal interactions among disjunct populations. Pleurodema thaul is a frog having an extensive latitudinal distribution in Chile along which males' advertisement calls exhibit an important variation. Using the playback paradigm we studied the evoked vocal responses of males of three populations of P. thaul in Chile, from northern, central and southern distribution. In each population, males were stimulated with standard synthetic calls having the acoustic structure of local and foreign populations. Males of both northern and central populations displayed strong vocal responses when were confronted with the synthetic call of their own populations, giving weaker responses to the call of the southern population. The southern population gave stronger responses to calls of the northern population than to the local call. Furthermore, males in all populations were stimulated with synthetic calls for which the dominant frequency, pulse rate and modulation depth were varied parametrically. Individuals from the northern and central populations gave lower responses to a synthetic call devoid of amplitude modulation relative to stimuli containing modulation depths between 30–100%, whereas the southern population responded similarly to all stimuli in this series. Geographic variation in the evoked vocal responses of males of P. thaul underlines the importance of inter-male interactions in driving the divergence of the acoustic traits and contributes evidence for a role of intra-sexual selection in the evolution of the sound communication system of this anuran.

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Section: Discussionsupporting

confidence: 70%

Section: Discussionsupporting

confidence: 68%

Divergence of Acoustic Signals in a Widely Distributed Frog: Relevance of Inter-Male Interactions

et al. 2014

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“…Similar effects have been reported in anurans (Littlejohn & Martin ; Wong et al. ; Penna & Meier ; Penna & Velásquez ). Birds also adjust the timing of their vocalizations in the presence of heterospecific songs (Popp et al.…”

Section: Introductionsupporting

confidence: 85%

“…In anuran species living in sympatry and therefore naturally subjected to reciprocal interference, a reduction in calling activity during exposure to heterospecific calls has been reported in some cases (Littlejohn & Martin ; Wong et al. ; Penna & Meier ; Penna & Velásquez ). In contrast with these results, males of other anurans have been shown to increase their calling activity when presented with heterospecific sympatric calls (Schwartz & Wells , ; Phelps et al.…”

Section: Introductionmentioning

confidence: 99%

Vocal Responsiveness to Interfering Sounds By a Frog From The Southern Temperate Forest, Batrachyla leptopus

Penna

Toloza

2014

Ethology

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Interfering sounds from biotic and abiotic origins are likely to shape the responsiveness of sound communicating animals. Among these sources of interference, interactions among acoustically active species have been studied to quite a limited extent. The vocal responses of 20 male frogs Batrachyla leptopus from the temperate austral forest in Chile were tested with conspecific calls and with the calls of two sympatric species: Batrachyla taeniata and Batrachyla antartandica, broadcast at amplitudes of 73, 79, 85, 91 and 97 dB SPL peak. Also, the vocal activity of the subjects during exposure to a 3-min continuous broadband noise presented at 67 dB SPL RMS was monitored. The subjects gave higher responses on average to the conspecific relative to the heterospecific calls, but in most comparisons, these differences did not reach levels of significance. In addition, the vocal activity of males of B. leptopus did not increase in the presence of the continuous broadband noise. The lack of clear preferential responses for conspecific signals contrasts with the sharp selectivities that B. taeniata and B. antartandica have shown for their own calls in previous studies. Such different vocal behavior could be related to the extensive geographic overlap of B. leptopus with the two other species in the temperate austral forest, where mixed choruses of this species with each of the two congeneric taxa have been reported to occur occasionally. The lack of vocal activation in the presence of continuous noise also contrasts with the increased vocal output with which the other two taxa respond to this intrusion and is likely to result from a relatively high spontaneous vocal activity in B. leptopus.

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“…Male frogs call in response to both conspecific and heterospecific call stimuli (i.e., evoked calling) and adjust the temporal placement of their calls relative to a range of acoustic stimuli (i.e., call timing) Grafe 1999;Marshall et al 2006;Amézquita et al 2011;Penna and Velásquez 2011). Male H. cinerea avoided the call overlap equally well with heterospecific as well as conspecific calls.…”

Section: Effects Of Cross-species Call Interference On Female Phonotamentioning

confidence: 98%

Sexual differences in responses to cross-species call interference in the green treefrog (Hyla cinerea)

Höbel

2015

Behav Ecol Sociobiol

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Many species gather in choruses to advertise and search for mates, creating noisy social environments that may impair effective communication. These challenges may be further compounded in mixed-species aggregations, where signals from different species overlap and mate-searching females may perceive heterospecific signals in more attractive relative timing positions. I conducted playback experiments with green treefrogs (Hyla cinerea) to test the effects of crossspecies call interference on sexual communication and found that the sexes responded differently to conspecific and heterospecific calls. Females differentiated between call types and preferentially approached the conspecific call, indicating that they were not negatively affected by cross-species call interference. By contrast, males did not differentiate between conspecific and heterospecific calls irrespective of the presented call type and males avoided call overlap and called shortly after the offset of any interfering call. I suggest that the observed sex difference is a function of the time frames that the individual has to evaluate the call before initiating a behavioral response. Slower behavioral responses, like phonotaxis that allows for a repeated sampling of a call during approach, may facilitate finer discrimination. Fast behavioral responses, like timing one's call relative to the call of a rival, may limit processing and result in higher permissiveness. As a result, similar call timing behavior in response to conspecific and heterospecific signals may be an artifact of strong selection for fast and precise call timing in the conspecific context and may essentially trap males into wasting time and energy interacting with heterospecifics.

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Heterospecific Vocal Interactions in a Frog from the Southern Temperate Forest, Batrachyla taeniata

Cited by 16 publications

References 37 publications

Divergence of Acoustic Signals in a Widely Distributed Frog: Relevance of Inter-Male Interactions

Divergence of Acoustic Signals in a Widely Distributed Frog: Relevance of Inter-Male Interactions

Vocal Responsiveness to Interfering Sounds By a Frog From The Southern Temperate Forest, Batrachyla leptopus

Sexual differences in responses to cross-species call interference in the green treefrog (Hyla cinerea)

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