Everglades crayfish "electric blue
morph" (Procambarus alleni)
photo credit: Chris Lukhaup

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Publication

Taylor, C.A., G.A. Schuster, J.E. Cooper, R.J. DiStefano, A.G. Eversole, P. Hamr, H.H. Hobbs, III., H.W. Robison, C.E. Skelton, R.F. Thoma. 2007. A Reassessment of the conservation status of crayfishes of the United States and Canada after 10+ years of increased awareness. Fisheries 32(8): 372-389.

Available through: American Fisheries Society

U.S. Geological Survey | American Fisheries Society

Crayfish Conservation Status

Status Categories and Abbreviations

Endangered (E): a species or subspecies that is in danger of extinction throughout all or extirpation from a significant portion of its range. An asterisk (*) following the letter "E" indicates the taxon is possibly extinct.

Threatened (T): a species or subspecies that is likely to become endangered throughout all or a significant portion of its range.

Vulnerable (V): a species or subspecies that may become endangered or threatened by relatively minor disturbances to its habitat and deserves careful monitoring of its abundance and distribution. This status is equivalent to "Special Concern" as designated by Deacon et al. (1979), Williams et al. (1989), and many governmental agencies and nongovernmental organizations.

Currently Stable (CS): a species or subspecies whose distribution is widespread and stable and is not in need of immediate conservation management actions.

Taxonomic Investigation (†): dagger symbol denotes a species complex under taxonomic investigation.

Listing Criteria

The categories of threats to taxa on the list follow those used by the 1979 and 1989 AFS fish lists with minor modification. Listing criteria are as follows:

(1) existing or potential destruction, modification, or reduction of a species' habitat or range.

(2) over-utilization for commercial, sporting, scientific, or educational purposes.

(3) disease.

(4) other natural or anthropogenic factors affecting a species' continued existence (e.g., hybridization, introduction of nonindigenous or transplanted species, predation, competition).

(5) occurs in a restricted range.