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

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 i...

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Autores principales: Moulton, Michael P., Cropper, Wendell P., Broz, Andrew J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4671158/
https://www.ncbi.nlm.nih.gov/pubmed/26644981
http://dx.doi.org/10.7717/peerj.1447
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author Moulton, Michael P.
Cropper, Wendell P.
Broz, Andrew J.
author_facet Moulton, Michael P.
Cropper, Wendell P.
Broz, Andrew J.
author_sort Moulton, Michael P.
collection PubMed
description 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 and accurate. Here, examine a widely introduced game bird, the Chukar (Alectoris chukar), to the USA. We compare the records reported by two secondary sources (Long, 1981; Lever, 1987) to those in a primary source (Christensen, 1970) and to a recent study by Sol et al. (2012). Numerous inconsistencies exist in the records reported by Sol et al. (2012), Long (1981) and Lever (1987) when compared to the primary record of Christensen (1970). As reported by Christensen (1970), very large numbers of Chukars were released unsuccessfully in some states. Our results strongly imply that factors other than sheer numbers are more important. Site-to-site differences are the most likely explanation for the variation in success.
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spelling pubmed-46711582015-12-07 Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States Moulton, Michael P. Cropper, Wendell P. Broz, Andrew J. PeerJ Biodiversity 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 and accurate. Here, examine a widely introduced game bird, the Chukar (Alectoris chukar), to the USA. We compare the records reported by two secondary sources (Long, 1981; Lever, 1987) to those in a primary source (Christensen, 1970) and to a recent study by Sol et al. (2012). Numerous inconsistencies exist in the records reported by Sol et al. (2012), Long (1981) and Lever (1987) when compared to the primary record of Christensen (1970). As reported by Christensen (1970), very large numbers of Chukars were released unsuccessfully in some states. Our results strongly imply that factors other than sheer numbers are more important. Site-to-site differences are the most likely explanation for the variation in success. PeerJ Inc. 2015-11-30 /pmc/articles/PMC4671158/ /pubmed/26644981 http://dx.doi.org/10.7717/peerj.1447 Text en © 2015 Moulton et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Biodiversity
Moulton, Michael P.
Cropper, Wendell P.
Broz, Andrew J.
Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title_full Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title_fullStr Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title_full_unstemmed Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title_short Inconsistencies among secondary sources of Chukar Partridge (Alectoris chukar) introductions to the United States
title_sort inconsistencies among secondary sources of chukar partridge (alectoris chukar) introductions to the united states
topic Biodiversity
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4671158/
https://www.ncbi.nlm.nih.gov/pubmed/26644981
http://dx.doi.org/10.7717/peerj.1447
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