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Journal of Neuroscience, Vol 3, 517-531, Copyright © 1983 by Society for Neuroscience
Song structure without auditory feedback: emendations of the auditory template hypothesis
P Marler and V Sherman
Motor patterns of songs of swamp and song sparrows, Melospiza georgiana and
M. melodia, deafened early in life display a significant degree of
species-specific structure. Normal songs of the two species differ in the
degree to which they are segmented. Swamp sparrow song consists of a single
segment, and song sparrow songs are multisegmental. Song and swamp sparrows
were deafened at 17 to 23 days, prior to the onset of song or subsong. The
song sparrows developed more segments in their singing than the swamp
sparrows. Species-specific trends were also evident in song durations and
frequency characteristics. Abnormalities were found, however, in the
morphology of the notes and syllables from which songs of early deafened
sparrows are constructed. These results require emendation of the auditory
template hypothesis of song learning in birds.
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