Document Detail

Call recognition in the bullfrog, Rana catesbeiana: generalization along the duration continuum.
MedLine Citation:
PMID:  15058356     Owner:  NLM     Status:  MEDLINE    
Male bullfrogs emit multicroak, quasiharmonic advertisement calls that function in mate attraction and neighbor recognition. The degree of variability of acoustic features in these calls can influence perceptual decisions by conspecific receivers. Analysis of duration of individual croaks in spontaneous advertisement calls of a sample of males shows considerable intraindividual variability in this feature, even within short chorusing bouts. The influence of this intraindividual variability on behavior was examined in a series of evoked calling experiments. When presented with synthetic calls whose croak durations varied over the range of the natural variability in this feature, males responded similarly to intermediate and long duration croaks, but significantly less to short duration croaks. When presented with playbacks of calls with croak durations outside the natural range of variability, males again responded significantly less to shorter durations. The response gradient for duration is thus asymmetrical, with stimuli at the shorter end of the continuum evoking fewer responses than stimuli at the longer end. This asymmetry may be related to the biological demands of rejecting perception of heterospecific advertisement calls, and of mediating appropriate responses to conspecific aggressive calls. The shape of the response gradient for duration may reflect a process of stimulus generalization.
Andrea Megela Simmons
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  115     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-04-02     Completed Date:  2004-07-23     Revised Date:  2010-09-20    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1345-55     Citation Subset:  IM    
Department of Psychology, Brown University, Providence, Rhode Island 02912, USA.
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MeSH Terms
Analysis of Variance
Auditory Perception / physiology*
Fourier Analysis
Rana catesbeiana / physiology*
Sound Spectrography
Tape Recording / methods
Vocalization, Animal / physiology*
Grant Support

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