Title page for ETD etd-06232009-063231
|Type of Document
||A test of the signal transmission hypothesis of vocal imitation in the white-eyed vireo (Vireo griseus)
||Master of Science
|Adkisson, Curtis S.
|Cranford, Jack A.
|Fraser, James D.
|Hopp, S. L.
|Date of Defense
This study compared male response to playback and
interspecific vocal imitation in two White-eyed Vireo
populations, in southwestern Virginia and eastern North
Carolina. White-eyed Vireos are hypothesized to imitate
notes from other birds which transmit efficiently through
dense habitat. Male White-eyed Vireos did not respond
differently to playback of each other I s songs. The song
repertoires between Virginia and North Carolina were not found
to include strikingly different imitations despite the
different sound environments. Degradation and attenuation of
White-eyed Vireo song notes was also compared between the two
locations. There was no statistically significant difference
in degradation or attenuation of notes when compared to native
or foreign habitat. Notes occurring more frequently in the
population did not transmit more efficiently. Notes unique
to North Carolina did transmit more efficiently in their
native habitat, but this difference was explained by the
relatively less dense habitat in North Carolina.
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