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Shift of song frequencies in response to masking tones

Goodwin, Sarah E ; Podos, Jeffrey

Animal Behaviour, February 2013, Vol.85(2), pp.435-440 [Periódico revisado por pares]

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  • Título:
    Shift of song frequencies in response to masking tones
  • Autor: Goodwin, Sarah E ; Podos, Jeffrey
  • Assuntos: Black-Capped Chickadee ; Communication ; Frequency ; Interference ; Masking ; Noise ; Overlap ; Plasticity ; Poecile Atricapillus ; Song ; Black-Capped Chickadee ; Communication ; Frequency ; Interference ; Masking ; Noise ; Overlap ; Plasticity ; Poecile Atricapillus ; Song
  • É parte de: Animal Behaviour, February 2013, Vol.85(2), pp.435-440
  • Descrição: Ambient noise can interfere with signal transmission and detection across many taxa and modalities. Evidence suggests that, over time, signals evolve to minimize interference from ambient noise and other signalling animals. Less well studied is the possibility of short-term behavioural responses to transient ambient noise, in which animals actively adjust signal parameters to recover signalling efficacy. Here we test animals' capacity to adjust vocal signal parameters in the face of transient acoustic interference. In field trials we monitored the songs of territorial male black-capped chickadees, Poecile atricapillus, determined the frequencies of their ‘fee-bee’ songs, and broadcast tones to closely mask subjects' ‘bee’ notes. We also presented control nonmasking tones of 5kHz, well above birds' song frequencies. Our main finding was that males responded to masking tones by shifting song frequencies after an average of 66.4s from tone onset, whereas frequency shifts in the presence...
  • Idioma: Inglês

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