| Quantitative determination of rarity of freshwater fishes and implications for imperiled-species designations. | |
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MedLine Citation:
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PMID: 20337684 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Conserving rare species and protecting biodiversity and ecosystem functioning depends on sound information on the nature of rarity. Rarity is multidimensional and has a variety of definitions, which presents the need for a quantitative classification scheme with which to categorize species as rare or common. We constructed such a classification for North American freshwater fishes to better describe rarity in fishes and provide researchers and managers with a tool to streamline conservation efforts. We used data on range extents, habitat specificities, and local population sizes of North American freshwater fishes and a variety of quantitative methods and statistical decision criteria, including quantile regression and a cost-function algorithm to determine thresholds for categorizing a species as rare or common. Species fell into eight groups that conform to an established framework for rarity. Fishes listed by the American Fisheries Society (AFS) as endangered, threatened, or vulnerable were most often rare because their local population sizes were low, ranges were small, and they had specific habitat needs, in that order, whereas unlisted species were most often considered common on the basis of these three factors. Species with large ranges generally had few specific habitat needs, whereas those with small ranges tended to have narrow habitat specificities. We identified 30 species not designated as imperiled by AFS that were rare along all dimensions of rarity and may warrant further study or protection, and we found three designated species that were common along all dimensions and may require a review of their imperilment status. Our approach could be applied to other taxa to aid conservation decisions and serve as a useful tool for future revisions of listings of fish species. |
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Authors:
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Jeremy J Pritt; Emmanuel A Frimpong |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Conservation biology : the journal of the Society for Conservation Biology Volume: 24 ISSN: 1523-1739 ISO Abbreviation: Conserv. Biol. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-12-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882301 Medline TA: Conserv Biol Country: United States |
Other Details:
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Languages: eng Pagination: 1249-58 Citation Subset: IM |
Copyright Information:
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© 2010 Society for Conservation Biology. |
Affiliation:
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Department of Fisheries and Wildlife Science, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061-0321, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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