Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages

 

Show simple item record

dc.contributor.author Bastian, Anna
dc.contributor.author Jacobs, David Steve
dc.coverage.spatial South Africa en_ZA
dc.date.accessioned 2017-10-27T07:11:41Z
dc.date.available 2017-03-02
dc.date.available 2017-10-27T07:11:41Z
dc.date.issued 2015-03-01
dc.identifier.citation Bastian, A., & Jacobs, D. S. (2015). Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages. Animal Behaviour, 101, 141-154. en_ZA
dc.identifier.issn 0003-3472 en_ZA
dc.identifier.uri http://hdl.handle.net/11427/25854
dc.description.abstract Communication is a fundamental component of evolutionary change because of its role in mate choice and sexual selection. Acoustic signals are a vital element of animal communication and sympatric species may use private frequency bands to facilitate intraspecific communication and identification of conspecifics (acoustic communication hypothesis, ACH). If so, animals should show increasing rates of misclassification with increasing overlap in frequency between their own calls and those used by sympatric heterospecifics. We tested this on the echolocation of the horseshoe bat, Rhinolophus capensis, using a classical habituation-dishabituation experiment in which we exposed R. capensis from two phonetic populations to echolocation calls of sympatric and allopatric horseshoe bat species (Rhinolophus clivosus and Rhinolophus damarensis) and different phonetic populations of R. capensis. As predicted by the ACH, R. capensis from both test populations were able to discriminate between their own calls and calls of the respective sympatric horseshoe bat species. However, only bats from one test population were able to discriminate between calls of allopatric heterospecifics and their own population when both were using the same frequency. The local acoustic signalling assemblages (ensemble of signals from sympatric conspecifics and heterospecifics) of the two populations differed in complexity as a result of contact with other phonetic populations and sympatric heterospecifics. We therefore propose that a hierarchy of discrimination ability has evolved within the same species. Frequency alone may be sufficient to assess species membership in relatively simple acoustic assemblages but the ability to use additional acoustic cues may have evolved in more complex acoustic assemblages to circumvent misidentifications as a result of the use of overlapping signals. When the acoustic signal design is under strong constraints as a result of dual functions and the available acoustic space is limited because of co-occurring species, species discrimination is mediated through improved sensory acuity in the receiver. en_ZA
dc.language eng en_ZA
dc.publisher Elsevier Ltd. en_ZA
dc.source Animal Behaviour en_ZA
dc.source.uri http://www.sciencedirect.com/science/journal/00033472?sdc=1
dc.subject.other acoustic communication
dc.subject.other acoustic assemblages
dc.subject.other acoustic communication hypothesis
dc.subject.other bats
dc.subject.other echolocation
dc.title Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages en_ZA
dc.type Journal Article en_ZA
uct.type.publication Research en_ZA
uct.type.resource Article en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Bastian, A., & Jacobs, D. S. (2015). Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages. <i>Animal Behaviour</i>, http://hdl.handle.net/11427/25854 en_ZA
dc.identifier.chicagocitation Bastian, Anna, and David Steve Jacobs "Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages." <i>Animal Behaviour</i> (2015) http://hdl.handle.net/11427/25854 en_ZA
dc.identifier.vancouvercitation Bastian A, Jacobs DS. Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages. Animal Behaviour. 2015; http://hdl.handle.net/11427/25854. en_ZA
dc.identifier.ris TY - Journal Article AU - Bastian, Anna AU - Jacobs, David Steve AB - Communication is a fundamental component of evolutionary change because of its role in mate choice and sexual selection. Acoustic signals are a vital element of animal communication and sympatric species may use private frequency bands to facilitate intraspecific communication and identification of conspecifics (acoustic communication hypothesis, ACH). If so, animals should show increasing rates of misclassification with increasing overlap in frequency between their own calls and those used by sympatric heterospecifics. We tested this on the echolocation of the horseshoe bat, Rhinolophus capensis, using a classical habituation-dishabituation experiment in which we exposed R. capensis from two phonetic populations to echolocation calls of sympatric and allopatric horseshoe bat species (Rhinolophus clivosus and Rhinolophus damarensis) and different phonetic populations of R. capensis. As predicted by the ACH, R. capensis from both test populations were able to discriminate between their own calls and calls of the respective sympatric horseshoe bat species. However, only bats from one test population were able to discriminate between calls of allopatric heterospecifics and their own population when both were using the same frequency. The local acoustic signalling assemblages (ensemble of signals from sympatric conspecifics and heterospecifics) of the two populations differed in complexity as a result of contact with other phonetic populations and sympatric heterospecifics. We therefore propose that a hierarchy of discrimination ability has evolved within the same species. Frequency alone may be sufficient to assess species membership in relatively simple acoustic assemblages but the ability to use additional acoustic cues may have evolved in more complex acoustic assemblages to circumvent misidentifications as a result of the use of overlapping signals. When the acoustic signal design is under strong constraints as a result of dual functions and the available acoustic space is limited because of co-occurring species, species discrimination is mediated through improved sensory acuity in the receiver. DA - 2015-03-01 DB - OpenUCT DP - University of Cape Town J1 - Animal Behaviour LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 SM - 0003-3472 T1 - Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages TI - Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages UR - http://hdl.handle.net/11427/25854 ER - en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record