Beak Evolution Conclusion for the Podos Article.
Podos states that his findings were consistent with the proposed vocal constraint hypothesis, which essentially states that as beak size changes, various levels of beak mobility will in turn change song quality and sound. His data suggests that the change in sound was correlated to both beak size as well as mass, however he later presented contrary evidence for the mass’s effect on this. He then proposes that several factors, including resource changes leading to beak size adaptation, as well as cultural evolution and various acoustic environment. Finally, he suggests that the importance of prezygotic isolating mechanisms (mating songs) are indirectly influenced by adaptive diversity of beaks. This particular experimental group is powerful as there is a high number of species within a relatively small area and opportunity for hybridization. Despite this, there has been rapid speciation and he believes that his songs help ensure “correct” mating occurs.