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Title: | Acoustic interference and recognition space within a complex assemblage of dendrobatid frogs |
Authors: | Amézquita, Adolfo Flechas, Sandra V. Lima, Albertina Pimental Gasser, Herbert Hödl, Walter |
Keywords: | Acoustic Interference Allobates Femoralis Ameerega Petersi Animals Communication Animals Experiment Auditory Stimulation Batrachochytrium Dendrobatidis Controlled Study Female Frog Multidimensional Scaling Nonhuman Priority Journal Signal Detection Signal Processing Sound Intensity Spatial Orientation Acoustic Stimulation Acoustics Animals Communication Animal Anura Biological Evolution Circadian Rhythm Male Models, Biological Peru Species Specificity Vocalization, Animals Animalsia Anura Dendrobatidae |
Issue Date: | 2011 |
metadata.dc.publisher.journal: | Proceedings of the National Academy of Sciences of the United States of America |
metadata.dc.relation.ispartof: | Volume 108, Número 41, Pags. 17058-17063 |
Abstract: | In species-rich assemblages of acoustically communicating animals, heterospecific sounds may constrain not only the evolution of signal traits but also the much less-studied signal-processing mechanisms that define the recognition space of a signal. To test the hypothesis that the recognition space is optimally designed, i.e., that it is narrower toward the species that represent the higher potential for acoustic interference, we studied an acoustic assemblage of 10 diurnally active frog species. We characterized their calls, estimated pairwise correlations in calling activity, and, to model the recognition spaces of five species, conducted playback experiments with 577 synthetic signals on 531 males. Acoustic co-occurrence was not related to multivariate distance in call parameters, suggesting a minor role for spectral or temporal segregation among species uttering similar calls. In most cases, the recognition space overlapped but was greater than the signal space, indicating that signal-processing traits do not act as strictly matched filters against sounds other than homospecific calls. Indeed, the range of the recognition space was strongly predicted by the acoustic distance to neighboring species in the signal space. Thus, our data provide compelling evidence of a role of heterospecific calls in evolutionarily shaping the frogs' recognition space within a complex acoustic assemblage without obvious concomitant effects on the signal. |
metadata.dc.identifier.doi: | 10.1073/pnas.1104773108 |
Appears in Collections: | Artigos |
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