Alabama Cave shrimp (Palaemonias alabamae)
Where Listed: WHEREVER FOUND
The Alabama cave shrimp is colorless and largely transparent with a total length of up to 20 mm (0.8 in.) (Cooper 1975; Smalley 1961). The only other species of Palaemonias is the endangered Kentucky cave shrimp, P. ganteri, known only from Mammoth Cave, Kentucky. Palaemonias alabamae is very similar to P. ganteri, but is smaller in size, has a shorter rostrum. generally lacks ventral rostral spines and has fewer dorsal rostral spines (Smalley 1961).
- States/US Territories in which the Alabama Cave shrimp, Wherever found is known to or is believed to occur: Alabama
- US Counties in which the Alabama Cave shrimp, Wherever found is known to or is believed to occur: View All
|Status||Date Listed||Lead Region||Where Listed|
|09/07/1988||Southeast Region (Region 4)||Wherever found|
» Federal Register Documents
|Date||Title||Plan Action Status||Plan Status|
|09/04/1997||Alabama Cave Shrimp Recovery Plan||View Implementation Progress||Final|
|Date||Citation Page||Title||Document Type|
|06/14/2005||70 FR 34492 34494||Initiation of 5-Year Reviews of 25 Southeastern Species||
|03/25/2014||79 FR 16366 16368||Endangered and Threatened Wildlife and Plants; 5-Year Status Reviews of 33 Southeastern Species||
|01/11/2016||Alabama Cave Shrimp (Palaemonias alabamae) 5-Year Review: Summary and Evaluation|
|08/29/2006||Alabama Cave Shrimp 5-Year Review|
» Critical Habitat
No critical habitat rules have been published for the Alabama Cave shrimp.
» Conservation Plans
No conservation plans have been created for Alabama Cave shrimp.
» Life History
Little is known about the habitat requirements of the ACS, other than it occurs in silt-bottomed pools in a cave environment (FWS 1997). Current knowledge is primarily based upon observations in Shelta and Bobcat caves. Only a few observations have been made in the HGB system; this system is different from Bobcat and Shelta caves in that the HGB system experiences substantial flows during spring and winter months (Rheams et al. 1992). Rheams and others (1992) reported that the cave bottom in this system had more sand and gravel compared to the other caves. Habitat in Muddy Cave is described as being similar to that found in Bobcat and the HGB cave system (McGregor, pers. comm. 2006). Habitat is extremely difficult to quantify due to the dynamic nature of cave systems. Basic chemical and physical conditions in the caves are highly influenced by land use in the recharge area and can be impacted by surface runoff from developments (e.g., residential) and manipulation of landscapes (e.g., clearing of forestland) in the recharge area. Efforts to determine potential threats are ongoing at Bobcat Cave by the Department of the Army RSA and Geological Survey of Alabama. As part of the Army Operational Range Assessment Program the Environmental Management Division at RSA is performing an assessment on the Army Installation to monitor munition constituents and has included water and sediment samples in Bobcat Cave in the analysis.
Movement / Home Range
The ACS was first collected in Shelta Cave in 1958 (Cooper 1975), yet it has not been seen there since the early 1970s. The population in Bobcat Cave has been monitored monthly from 1990 to the present and remains viable. With the discovery of populations in Hering/Glover (1991) and in Brazelton Cave (1994) (Rheams et al. 1994), and ACS found in Muddy Cave (2005) (Kuhajda, pers. comm. 2006a) the total range of the species extends approximately 20 km (12 miles) east-southeast across the Flint River and the Huntsville, Green, and Monte Sano mountains and southward to near the Tennessee River (McGregor et al. 1994). In December 1993, McGregor et al. (1994) mentioned three individual shrimp from a cave in western Jackson County about 24 km (15 miles) northeast of Hering Cave (reported by a recreational caver in Limrock Blowing Cave); however, this siting has never been confirmed.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.