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Cherax leckii 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Malacostraca Decapoda Parastacidae

Scientific Name: Cherax leckii Coughran, 2005

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2010
Date Assessed: 2009-06-05
Assessor(s): Coughran, J.
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:
Cherax leckii has been assessed as Critically Endangered under criterion B1ab(iii)+2ab(iii). This species is known only from the type locality, with an estimated extent of occurrence of 10 km²; its area of occupancy is almost certainly less than 10 km². Cattle trampling is evident at the site, and pesticide and herbicides are used in the area for park maintenance. There is also a growing concern over specimen collecting of rare crayfish species by hobbyists. Further research is urgently required to investigate the impact of threats, exact distribution and ecological requirements of this species in order for appropriate conservation measures to be made.

Geographic Range [top]

Range Description:This species is known only from a tributary of Koreelah Creek in the Koreelah National Park which can be found on the New South Wales/ Queensland Border in Australia (Coughran 2005). Two hundred and forty five sites were sampled in surrounding areas over a three year period (some sites were re-sampled) and no further specimens were found suggesting that this is a range restricted species (Coughran 2005).
Countries occurrence:
Native:
Australia (New South Wales)
Additional data:
Estimated area of occupancy (AOO) - km2:0-10
Number of Locations:1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is only known from a few specimens.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:Unknown

Habitat and Ecology [top]

Habitat and Ecology:Specimens were collected from beneath cobbles and boudlers, in shallow depressions and multi-chambered burrows. Surface water was absent, but there was water in a pool overlying bedrock, and further upstream. This species' occurrence above an elevation of 400 m, is unusual for the Cherax genus (Coughran 2005).
Systems:Freshwater

Threats [top]

Major Threat(s): There are a number of potential threats within this species' range: cattle trampling, pesticides and herbicides (used in park maintenance), and climate change (global temperature increase). A new and emerging threat is posed by specimen collection by hobbyists, especially for restricted range species such as this (J. Coughran pers. comm. 2010). Whilst the precise effects of these threats on the population are not known, they are considered a significant threat to this highly restricted range species.

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for this species though it is located within a national park.

Cherax leckii is of conservation concern, and further research is required on the biology and ecology of this species. Finer scale mapping of this species’ distribution within Koreelah National Park is recommended, along with detailed investigations of its environmental tolerances (Coughran, Leckie and Gartside 2008). Further research is urgently required to ascertain how the population is affected by threats.

Citation: Coughran, J. 2010. Cherax leckii. The IUCN Red List of Threatened Species 2010: e.T184424A8274399. . Downloaded on 23 September 2018.
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