The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes were balanced by repeated immigration and subsequent breeding: song flow.
More Quotes from Peter R. Grant:
Thus the genetic basis to the origin of bird species is to be sought in the inheritance of adult traits that are subject to natural and sexual selection.Peter R. Grant
We observe closely related species in sympatry and infer how they evolved from a common ancestor.
Peter R. Grant
Almost nothing is known from hybridization studies about the inheritance of courtship behavior of females, or of their responsiveness to particular male signals.
Peter R. Grant
Islands are known to differ in the food supply available to ground finches, mainly seeds.
Peter R. Grant
Species can be recognized by their morphological characteristics and songs.
Peter R. Grant
Exchange of breeding individuals between two populations tends to homogenize their gene pools.
Peter R. Grant
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