|Scientific Name:||Euastacus urospinosus Riek, 1956|
|Red List Category & Criteria:||Endangered B1ab(iii) ver 3.1|
|Assessor(s):||Coughran, J. & Furse, 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.|
Eustacus urospinosus has been assessed as Endangered under criterion B1ab(iii). This species has a severely fragmented distribution, is known from only two locations, and has an extent of occurrence of approximately 200 km2. There has been a continuing decline in the quality of habitat due to the destructive nature of a number of exotic species in the area, some of which also predate upon this species. There is also destruction of suitable rainforest habitat in parts of its range. This species also faces the consequences of global temperature rise. As a restricted range species, dependent on cool, clear headwater streams, a slight increase in temperature could rapidly extirpate this species.This species is also thought to be subject to illegal fishing pressure, which is likely to drive significant declines in the population owing to its slow growth rate, coupled with fragmented distribution. Research should be initiated to include population assessment and monitoring, biological and life history information, habitat requirements, and resilience to effects of exotic species.
|Previously published Red List assessments:|
|Range Description:||This species is endemic to |
|Range Map:||Click here to open the map viewer and explore range.|
Few specimens have been collected of this species from the Maleny and Mapleton localities, but in a more intensive, long-term study in the Conondale Ranges, Borsboom (1998) collected it in high numbers (J. Coughran and J.M Furse pers. comm. 2009).
|Current Population Trend:||Unknown|
|Habitat and Ecology:|
This species inhabits cool, clear fast flowing headwaters in rainforested areas. Like other species of Euastacus, this species prefers heavily shaded, well oxygenated waters where it can burrow under logs and rocks (Horwitz 1990).
Given the apparently restricted range of each population, the species is susceptible to localized impacts, including bush fires, forest management, practices, habitat destruction and over exploitation by collectors. Climate change, including increasing temperature, alterations to hydrological regimes, severe weather events, loss of suitable rainforest habitat and increased potential for bushfires (Chiew and McMahon 2002, Howden 2003, Hughes 2003, Pittock 2003, Hennessy 2006, Westoby and Burgman 2006, IPCC 2007). There is a potential large scale threat from Cane Toads (Rhinella marina) (DEH 2004a) although there are no specific data on impacts for this species. Other exotic species (cats, foxes pigs, goats) that have generally been found to impact on crayfish (Green and Osbourne 1981, Horwitz 1990, Merrick 1995, Eyre et al. 1997, ACT Government 2007, O'Brien 2007) also occur in this species' range (DEH 2004a,c,d,e) and given the restricted distribution, could have impacts on this species by contributing to declines in its distribution and/or abundance (J. Coughran and J.M Furse pers. comm. 2009). Smith et al. (1998) considered the potential threat of illegal recreational fishing for the larger Euastacus hystricosus in the Conondale area, and this may also be a threat to E. urospinosus. Due to the narrow thermal tolerance of this species, and its restricted range (restricted to cool, headwater streams in forested catchments), global temperature increase has resulted in range contraction. This species is further compromised by the presence of exotic species (feral pigs, goats, foxes, Cane Toads and cats) which are known to predate on crayfish and degrade riparian habitat; while the precise effects of these threats on this species are not yet well understood, they are believed to be significantly impacting the long term viability of the population (J. Furse and J. Coughran pers. comm. 2010).
There are no species-specific conservation measures in place for this species, however it does occur in the Conondale and
All ‘spiny crayfish’ (Euastacus) species in
Australian Capital Territory (ACT) Government. 2007. Ribbons of Life: ACT Aquatic Species and Riparian Zone Conservation Strategy, Action Plan No. 29. Department of Territory and Municipal Services, Canberra, Australia.
Borsboom, A. 1998. Aspects of the biology and ecology of the Australian freshwater crayfish, Euastacus urospinosus (Decapoda: Parastacidae). Proceedings of The Linnean Society of New South Wales 119: 87-100.
Chiew, F.H.S. and McMahon, T.A. 2002. Modelling the impacts of climate change on Australian streamflow. Hydrological Processes 16: 1235-1245.
Department of Primary Industries and Fisheries, Queensland (DPIF). 2007. Recreational Fishing Rules and Regulations for Queensland: A Brief Guide. Freshwaters. Available at: http://www.dpi.qld.gov.au/cps/rde/dpi/hs.xsl/28_2981_ENA_HTML.htm.
Department of the Environment and Heritage. 2004a. European red fox (Vulpes vulpes). Invasive species fact sheet. Department of the Environment and Heritage, Canberra, Australian Capital Territory, Australia.
Department of the Environment and Heritage. 2004b. The feral cane toad (Bufo marinus). Invasive species fact sheet. Department of the Environment and Heritage, Canberra, Australian Capital Territory, Australia.
Department of the Environment and Heritage. 2004c. The feral cat (Felis catus). Invasive species fact sheet. Department of the Environment and Heritage, Canberra, Australian Capital Territory, Australia.
Department of the Environment and Heritage. 2004d. The feral goat (Capra hircus). Invasive species fact sheet. Department of the Environment and Heritage, Canberra, Australian Capital Territory, Australia.
Department of the Environment and Heritage. 2004e. The feral pig (Sus scrofa). Invasive species fact sheet. Department of the Environment and Heritage, Canberra, Australia Capital Territory, Australia.
Eyre, T., Barratt, D. and Venz, M. 1997. Systematic Vertebrate Fauna Survey Project: Stage II – Assessment of Habitat Quality for Priority Species in Southeast Queensland Bioregion. In: Queensland CRA/RFA Steering Committee (ed.). Queensland.
Fetzner, J.W. 2008. Crayfish Taxonomy Browser. Available at: http://iz.carnegiemnh.org/crayfish/NewAstacidea/infraorder.asp?io=Astacidea. (Accessed: June).
Fetzner, J. W. Jr. 2005. The crayfish and lobster taxonomy browser: A global taxonomic resource for freshwater crayfish and their closest relatives. Available at: http://iz.carnegiemnh.org/crayfish/NewAstacidea/. (Accessed: 16 December 2008).
Green, K. and Osbourne, W.F. 1981. The diet of foxes, Vulpes vulpes (L.) in relation to abundance of prey above the winter snowline in New South Wales. Australian Wildlife Research 8: 349-360.
Hennessy, K. 2006. Climate change scenarios for initial assessment of risk in accordance with risk management guidance. Commonwealth Scientific and Industrial Research Organization, Australia.
Horwitz, P. 1990. The conservation status of Australian freshwater crustacea with a provisional list of threatened species, habitats and potentially threatening processes. Report number 14. Australian National Parks and Wildlife Service, Canberra.
Howden, M. 2003. Climate trends and climate change scenarios. In: Howden, M., Hughes, L., Dunlop, M., Zethoven, I., Hilbert, D and Chilcott, C (eds), Climate Change Impacts On Biodiversity In Australia. Outcomes of a workshop sponsored by the Biological Diversity Advisory Committee, 1–2 October 2002, Canberra, Australia.
Hughes, L. 2003. Climate change and Australia: Trends, projections and impacts. Austral Ecology 28: 423-443.
Intergovernmental Panel on Climate Change. 2007. Climate Change 2007 – Synthesis Report. An Assessment of the Intergovernmental Panel on Climate Change. Intergovernmental Panel on Climate Change, Geneva, Switzerland.
IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: http://www.iucnredlist.org. (Accessed: 2 September 2010).
Merrick, J.R. 1995. Diversity, distribution and conservation of freshwater crayfishes in the eastern highlands of New South Wales. Proceedings of the Linnean Society of New South Wales 115: 247-258.
Morgan, G. J. 1988. Freshwater crayfish of the genus Euastacus Clark (Decapoda: Parastacidae) from Queensland. Memoirs of The Museum of Victoria 49: 1-49.
O'Brien, M.B. 2007. Freshwater and terrestrial crayfish (Decapoda, Parastacidae) of Victoria, status, conservation, threatening processes and bibliography. The Victorian Naturalist 14(4): 210-229.
Pittock, B. 2003. Climate Change: An Australian Guide to the Science and Potential Impacts. Australian Greenhouse Office, Canberra.
Riek, E.F. 1969. The Australian freshwater crayfish (Crustacea: Decapoda: Parastacidae), with descriptions of new species. Australian Journal of Zoology 17: 855-918.
Westoby, M. and Burgman, M. 2006. Commentary. Climate change as a threatening process. Austral Ecology 31: 549-550.
|Citation:||Coughran, J. & Furse, J. 2010. Euastacus urospinosus. The IUCN Red List of Threatened Species 2010: e.T8147A12891980.Downloaded on 22 July 2018.|
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