Marron, freshwater crayfish Cherax tenuimanus - Department of ...

In all other freshwater areas, low biosecurity culture facilities can be installed. It should be noted
that all these recommended levels of biosecurity should be implemented in conjunction with the
other preventative measures discussed in Section 11.
The construction of closed and partial recirculating facilities which treat water and/or recyclewater
should be encouraged wherever possible, to prevent the discharge of organisms and waste products
into the surrounding environment.
De Moor (2002) warns against the further import of live C. tenuimanus. He concludes that due to the
high risk posed by parasites of C. tenuimanus infecting indigenous species, and the damages already
caused by this, combined with the disappointing results that have been achieved so far in terms of
aquaculture, it is clear the environmental damage has already outweighed the economic benefits
from imports, and that there is no point in allowing the importation of species unlikely to be of
commercial value.
An assessment of the invasive potential of C. tenuimanus undertaken in accordance with the
European Non-Native Species Risk Analysis Scheme (ENSARS) suggests that C. tenuimanus should be
evaluated in more detail before further introduced to this country. Assessments conducted on the
potential impacts of this species on local fauna in areas where it has already been introduced
indicate that these impacts are potentially severe, especially the threat posed by diseases and
parasites. Scientific monitoring should be undertaken at the current aquaculture facilities to assess
the impacts of individual farms (and the techniques utilised in each facility).
13 References
Ackefors, H. &. Lindqvist, O.V. 1994. Cultivation of freshwater crayfishes in Europe. In: Huner, J.V.
(Ed.) Freshwater crayfish aquaculture in North America, Europe, and Australia. Food
Products Press, New York, USA. Pp.157-216.
ACWA. 2012. Aquaculture Council of Western Australia.
http://www.aquaculturecouncilwa.com/marron/guide-to-marron-farming Accessed: 10
September 2012.
Austin, C.M. & Ryan, S.G. 2002. Allozyme evidence for a new species of freshwater crayfish of the
genus Cherax Erichson (Decapoda: Parastacidae) from the south-west of Western Australia.
Invertebrate Systematics 16: 357-367.
Austin, C.M. & Bunn, J. 2010. Cherax tenuimanus. In: IUCN 2012. IUCN Red List of Threatened
Species. Version 2012.1. . Downloaded on 22 August 2012.
Avenant-Oldewage, A. 1993. Occurrence of Temnocephala chaeropsis on Cherax tenuimanus
imported into South Africa, and notes on its infestation of an indigenous crab. South African
Journal of Science 89: 427–428.
Borquin, O., Pike, T., Johnson, D., Rowe-Rowe, D. & Appleton, C.C. 1984. Alien animal species.
Internal report to the Natal Parks, Game and Fish Preservation Board, Pietermartizburg. Pp.
36.
Britz, P.J., Lee, B. & Botes, L. 2009. AISA 2009 Aquaculture Benchmarking Survey: Primary Production
and Markets. AISA report produced by Enviro-Fish Africa (Pty) Ltd. 117 pp.
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