Male orientation on vocalization perches could optimize acoustic signal transmission in anurans

 

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Bibliografiska uppgifter
Författarna: Sandoval Vargas, Luis Andrés, Barrantes Montero, Gilbert, Protti Sánchez, Francesca, García Rodríguez, Adrián
Materialtyp: artículo original
Utgivningstid:2020
Beskrivning:Acoustic signals are distorted by vegetation, wind currents, or other sounds when transmitted through the environment. Consequently, vocalizations with features that optimize sound transmission or behaviors that improve the efficacy of communication have evolved in many animal species. Among behavioral strategies, some species call from perches above the ground to increase the propagation distance of their acoustic signals. However, the orientation in the perch also influences the transmission of the vocalizations, so that frogs calling from different orientations (i.e., horizontal, upward, or downward) may affect differently the quality and efficacy of sound transmission. We implemented a sound transmission experiment to test for the effect of calling orientation (upward, downward, and horizontal) and distance on the attenuation and degradation of advertisement calls in the common dink frog Diasporus diastema. We broadcasted and re-recorded advertisement calls at 2 m height, setting the speaker in three directions (upward, downward, and horizontal) to simulate different signaler orientations. We found that attenuation of the advertisement calls is significantly reduced when the speaker was directed either upward or downward, rather than horizontally. However, the degradation of call is lower when the speaker is direct horizontally. Since calls produced from either upward or downward orientations could travel farther, they could be used to signal male spatial location, while calls produced from a horizontal position could provide information on male quality at shorter distances at advanced phases of courtship.
Land:Kérwá
Organisation:Universidad de Costa Rica
Repositorio:Kérwá
Språk:Inglés
OAI Identifier:oai:https://www.kerwa.ucr.ac.cr:10669/85715
Länkar:https://onlinelibrary.wiley.com/doi/abs/10.1111/eth.13097
https://hdl.handle.net/10669/85715
Access Level:acceso abierto
Nyckelord:Calling orientation
Common dink frog
Diasporus diastema
Eleutherodactylidae
Sound degradation
Sound transmission experiment