The function of call alternation in the African reed frog ( Hyperolius marmoratus ): precise call timing prevents auditory masking

Grafe, T. Ulmar

doi:10.1007/s002650050227

Cited by 144 publications

(105 citation statements)

References 40 publications

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“…A vocalização tem um papel importante nas agregações reprodutivas, mantendo o espaçamento entre os machos e atraindo fêmeas (e.g., Gerhardt 1994, Ryan 2001. O canto de anúncio é a vocalização mais freqüentemente emitida pelos machos (Wells 1977), pois contém informações espectrais e/ou temporais importantes para o reconhecimento específico (Gerhardt 1983, Ryan 1985, Cocroft & Ryan 1995, e apresenta adaptações que evitam ou minimizam a interferência acústica na comunicação (Grafe 1996, Martins & Jim 2003, Martins et al 2006, permitindo a coexistência de várias espécies no mesmo ambiente (Duellman & Pyles 1983, Cardoso & Viellard 1990, Márquez et al 1993, Bastos & Haddad 1995, Viellard & Cardoso 1996, Martins & Jim 2003e Martins et al 2006). Do ponto de vista da comunidade, a análise da vocalização indica que as espécies simpátricas vocalizam com diferenças significantes e com pequena sobreposição nos parâmetros acústicos (Duellman 1967, Hödl 1977, Cardoso & Viellard 1990, embora este padrão nem sempre seja encontrado (Chek et al 2003).…”

Section: Introductionunclassified

Bioacústica e sítio de vocalização em taxocenoses de anuros de área aberta no noroeste paulista

2008

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Abstract:The calling site and the acoustic parameters of the advertisement call were determined for 18 anuran species in six ponds in the northwest region of São Paulo State. The dominant frequency of the advertisement call was positively correlated with the CRC of the species: small size species vocalized in a higher frequency, whereas larger species vocalized in a lower frequency. The similarity in the spectral and temporal parameters of the advertisement call was high among 94% of the recorded species. The similarity on calling site was low; only 22% of species presented high overlap, in spite of about a half of the species have been generalist in calling site use. Analysing simultaneously the similarity on calling site, habitat and advertisement call parameters, the proportion of species with high overlap decreased from 94 to 11%, corresponding to the overlap between a single pair of species: Dendropsophus elianeae and D. minutus. The species that overlap in calling site presented segregation in acoustic parameters, and those that overlap in acoustic parameters tended to partition the calling site. This result suggests the occurrence of niche complementarity, since species that occupied a similar position in one dimension tended to differ in another dimension. The structural homogeneity of ponds, the climatic severity of the region and the high degree of habitat loss restrict the abundance of population and the species richness of the anuran assemblages. The low overlap on the calling site is probably associated with the insaturation of the sampled communities. Resumo: O sítio de vocalização e os parâmetros acústicos do canto de anúncio foram determinados para 18 espécies de anuros em seis corpos d'água na região noroeste paulista. A freqüência dominante do canto de anúncio foi positivamente correlacionada com o CRC das espécies: as espécies pequenas vocalizaram em uma freqüência mais alta e as maiores vocalizaram em uma freqüência mais baixa. A similaridade nos parâmetros espectrais e temporais do canto de anúncio foi alta entre 94% das espécies registradas. A similaridade no uso do sítio de vocalização foi baixa, apenas 22% das espécies apresentaram alta sobreposição, apesar de cerca de metade das espécies terem sido generalistas no uso de sítio de vocalização. Analisando conjuntamente a similaridade no uso de sítio de vocalização, no hábitat e nos parâmetros do canto de anúncio, a proporção de espécies com alta sobreposição diminui de 94% para 11%, correspondente à sobreposição entre um único par de espécies: Dendropsophus elianeae e D. minutus. Espécies com sobreposição no sítio de vocalização apresentaram segregação nos parâmetros acústicos e, espécies com sobreposição nos parâmetros acústicos tenderam a partilhar sítio de vocalização. Esse resultado sugere a ocorrência de complementaridade de nicho, pois as espécies que ocuparam uma posição similar em uma dimensão tenderam a diferir em outra dimensão. A homogeneidade estrutural dos corpos d'água, a severidade climática da região e o elevado grau de con...

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Section: Introductionunclassified

Bioacústica e sítio de vocalização em taxocenoses de anuros de área aberta no noroeste paulista

2008

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“…Specifically, the large differences in overall noise levels consistent with measured wind noise levels between the two substrate categories suggest that spiders on artificial substrates remain less sensitive to prey cues under natural noisy events. If sensitivity to prey cues is shaped by adaptation to natural noise levels as in other behaviours such as vocal signalling (Ficken, Ficken, & Hailman, 1974;Grafe, 1996;Lang, 1996), we may expect a mismatch between noise conditions and spiders' responses to them on artificial substrates. For example, in the presence of wind, insects are able to escape more readily from webs and if spiders do not elevate their response, they would be less likely to catch prey under these conditions.…”

Section: Discussionmentioning

confidence: 99%

Vibratory noise in anthropogenic habitats and its effect on prey detection in a web-building spider

Elias

2014

Animal Behaviour

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“…Our data show that such call timing leads to forward masking when males are in close proximity, making trailing calls less salient than leading calls in antiphonal call bouts. In several species, females have been found to prefer (in terms of approaching and mating with) males producing the leading calls (Bosch and Marquez, 2002;Dyson and Passmore, 1988;Grafe, 1996) and this also appears to be true in green treefrogs (Höbel, 2010(Höbel, , 2011Höbel and Gerhardt, 2007). Our results show that hearing calls would mitigate, but not eliminate, this effect.…”

Section: Effects Of Masking On Communicationmentioning

confidence: 99%

The effects of call-like masking diminish after nightly exposure to conspecific choruses in green treefrogs (Hyla cinerea)

Gall

Wilczynski

2016

Journal of Experimental Biology

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One of the major difficulties encountered by animals that select mates using acoustic signals is discriminating individual calls from the background noise generated by other conspecifics. Reducing the effects of conspecific masking could improve discrimination of individual calls from background noise. We used auditory evoked potentials to investigate the effects of forward masking on the responses to artificial calls in male and female treefrogs (Hyla cinerea), as well as whether hearing advertisement calls over several nights, as happens in natural frog choruses, could modify the effects of masking. We found that response amplitude decreased with decreasing interstimulus interval when the masker was equal in amplitude to the stimulus. We also found evidence of a priming effect, whereby response amplitude at lower masker amplitudes was greater than when the target stimulus was not preceded by a masker. Finally, we found that the effect of masking was diminished by 10 nights of chorus exposure (i.e. responses were stronger to target stimuli), whereas there was no change in response in the control group. Our results show that hearing dynamic social stimuli, such as frog choruses, can alter the responses of the auditory periphery in a way that could enhance the detection of and response to conspecific acoustic communication signals.

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The function of call alternation in the African reed frog ( Hyperolius marmoratus ): precise call timing prevents auditory masking

Cited by 144 publications

References 40 publications

Bioacústica e sítio de vocalização em taxocenoses de anuros de área aberta no noroeste paulista

Bioacústica e sítio de vocalização em taxocenoses de anuros de área aberta no noroeste paulista

Vibratory noise in anthropogenic habitats and its effect on prey detection in a web-building spider

The effects of call-like masking diminish after nightly exposure to conspecific choruses in green treefrogs (Hyla cinerea)

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