Procambarus horsti 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Malacostraca Decapoda Cambaridae

Scientific Name: Procambarus horsti Hobbs & Means, 1972
Common Name(s):
English Big Blue Spring Cave Crayfish

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2010-06-01
Assessor(s): Crandall, K.A.
Reviewer(s): Collen, B. & Richman, N.
Contributor(s): Livingston, F., Livingston, F., Soulsby, A.-M., Batchelor, A., Dyer, E., Whitton, F., Milligan, H.T., Smith, J., Lutz, M.L., De Silva, R., McGuinness, S., Kasthala, G., Jopling, B., Sullivan, K. & Cryer, G.
Procambarus horsti has been assessed as Endangered under criteria B1ab(iii). This species has an estimated extent of occurrence of 98 km² and is only known from 2 locations in Jefferson and Leon Counties in Florida. While both sites fall with national parkland, both tourism and pollution of the freshwater aquifer from neighbouring pollution sources poses a threat to this species. Further research on the population trends of this species is needed given its restricted range.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is found in two localities in Jefferson and Leon counties, Florida and possibly in one other, but this is a questionable sighting and yet to be positively confirmed (Hobbs and Means 1972). This species has an estimated extent of occurrence of 98 km².
Countries occurrence:
United States (Florida)
Additional data:
Number of Locations:2
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The Big Blue Spring population of this species may be very large (Hobbs and Means 1972).
Current Population Trend:Unknown
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:This species is found in subterranean springs (Hobbs and Means 1972).

Threats [top]

Major Threat(s): The springs in which this species is found, are tourist attractions but swimming is not recommended due to the presence of alligators. Further research is needed on the impact of tourism on these springs (K. Crandall pers. comm. 2009). This species is very likely susceptible to pollution of the groundwater aquifer (NatureServe 2009).

Conservation Actions [top]

Conservation Actions:

This species has been given a NatureServe Global Heritage Status Rank of G1, and was assigned an American Fisheries Society Status of 'endangered' based on its restricted range and ongoing habitat degradation (Taylor et al. 2007, NatureServe 2009). One of the springs in which this species is found is surrounded by a national wildlife refuge. Further research is needed on the population trends.

Errata [top]

Errata reason: This errata version of this assessment has been published in order to correct a mistake in the rationale of the assessment regarding the distribution of this species. The distribution of this species now correctly reads that it is found in just two locations in Jefferson and Leon Counties in Florida.

Citation: Crandall, K.A. 2010. Procambarus horsti (errata version published in 2017). The IUCN Red List of Threatened Species 2010: e.T18201A121724441. . Downloaded on 24 September 2018.
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