Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States

@article{Moulton2015InconsistenciesAS,
  title={Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States},
  author={Michael P. Moulton and Wendell P. Cropper and Andrew J. Broz},
  journal={PeerJ},
  year={2015},
  volume={3}
}
The propagule pressure hypothesis asserts that the number of individuals released is the key determinant of whether an introduction will succeed or not. It remains to be shown whether propagule pressure is more important than either species-level or site-level factors in determining the fate of an introduction. Studies claiming to show that propagule pressure is the primary determinant of introduction success must assume that the historical record as reported by secondary sources is complete… 

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