Songbird frequency selectivity and temporal resolution vary with sex and season

Many species of songbirds exhibit dramatic seasonal variation in song output. Recent evidence suggests that seasonal changes in auditory processing are coincident with seasonal variation in vocal output. Here, we show, for the first time, that frequency selectivity and temporal resolution of the son...

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Bibliographic Details
Published in:Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2013-01, Vol.280 (1751), p.20122296-20122296
Main Authors: Gall, Megan D., Salameh, Therese S., Lucas, Jeffrey R.
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Analysis of Variance
Animals
Auditory Perception - physiology
Auditory-Evoked Potentials
Communication
Enzyme-Linked Immunosorbent Assay
Estradiol - blood
Evoked Potentials, Auditory - physiology
Female
House Sparrow
Indiana
Male
Plasticity
Seasonality
Seasons
Sex Factors
Sparrows - physiology
Testosterone - blood
Time Factors
Vocalization, Animal - physiology
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Summary:Many species of songbirds exhibit dramatic seasonal variation in song output. Recent evidence suggests that seasonal changes in auditory processing are coincident with seasonal variation in vocal output. Here, we show, for the first time, that frequency selectivity and temporal resolution of the songbird auditory periphery change seasonally and in a sex-specific manner. Male and female house sparrows (Passer domesticus) did not differ in their frequency sensitivity during the non-breeding season, nor did they differ in their temporal resolution. By contrast, female house sparrows showed enhanced frequency selectivity during the breeding season, which was matched by a concomitant reduction of temporal resolution. However, males failed to show seasonal plasticity in either of these auditory properties. We discuss potential mechanisms generating these seasonal patterns and the implications of sex-specific seasonal changes in auditory processing for vocal communication.
ISSN:0962-8452
1471-2945
1471-2954
DOI:10.1098/rspb.2012.2296