Map_thumbnail_large_font

Cambarellus patzcuarensis

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA MALACOSTRACA DECAPODA CAMBARIDAE

Scientific Name: Cambarellus patzcuarensis
Species Authority: Villalobos, 1943

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2010-06-01
Assessor/s: Alvarez, F., López-Mejía, M. & Pedraza Lara, C.
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.
Justification:

Cambarellus patzcuarensis has been assessed as Endangered under criterion B1ab(iii). This species has an Extent of Occurrence of approximately 200 km2 and is only known from 1 - 5 locations based on ongoing water abstraction and pollution incidents. Aquatic systems in which this species is found, have been impacted by a variety of threats though the effects of these on population numbers is not known and therefore warrants further investigation. Should the population be found to be relatively stable, then this species would warrant listing under Near Threatened.

Geographic Range [top]

Range Description: This species is known from its type locality in Lake Patzcuaro, Michoacán, Mexico (Hobbs 1974).  This lake has a surface area of 130 km2 (Torres 1993) and is at an altitude of 2,035 m above sea level (Bradbury 2000). Furthermore, this species is also known to occur in springs in Chapultepec, Opopeo and Tzurumutaro, Mexico (M. López-Mejía., F. Alvarez. and C. Pedraza-Lara pers. comm. 2009). Although the basin is 982km2 this species is probably restricted to a limited area around the lake (C. Pedraza-Lara pers. comm 2010). It has been estimated that this species occurs in an area of approximately 200 km2.
Countries:
Native:
Mexico (Michoacán)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is thought to be abundant; in the1950s 400 individuals were collected during survey work. Furthermore, survey work conducted surrounding Janitzio Island within Lake Patzcuaro describes this species as abundant (M. López-Mejía., F. Alvarez. and C. Pedraza-Lara pers. comm. 2009).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This species is known from its type locality in Lake Patzcuaro, Michoacán, Mexico (Hobbs 1974).  This lake has a surface area of 130 km2 (Torres 1993) and is at an altitude of 2,035 m above sea level (Bradbury 2000). It is a warm polymictic lake, with a mean depth of 4.9 m and a maximum depth of  12 m (Torres 1993). Furthermore, this species is also known to occur in springs in Chapultepec, Opopeo and Tzurumutaro, Mexico (M. López-Mejía., F. Alvarez. and C. Pedraza-Lara pers. comm. 2009). These are usually to be isolated populations (Pedraza-Lara pers. comm. 2010). 
Systems: Freshwater

Threats [top]

Major Threat(s): Lake Patzcuaro is under threat from increasing siltation rates and inputs of raw sewage (Torres 1993). The lake basin is highly developed, with cattle ranching, water abstraction and deforestation occurring. Furthermore, this species is occasionally taken as by-catch and consumed (M. López-Mejía., F. Alvarez. and C. Pedraza-Lara pers. comm. 2009). However, it is not known what impact these threats may be having on this species (M. López-Mejía., F. Alvarez. and C. Pedraza-Lara pers. comm. 2009) .

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for this species, however Lake Pátzcuaro is a RAMSAR site (Pedraza-Lara pers. comm. 2010).  Further research is needed to look at population trends and how it has been impacted by the range of threats.
Citation: Alvarez, F., López-Mejía, M. & Pedraza Lara, C. 2010. Cambarellus patzcuarensis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided