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The yabbie in Western Australia: An invasion from the east

Beatty, S., Morgan, D. and Gill, H. (2006) The yabbie in Western Australia: An invasion from the east. In: ASFB 2006 Workshop and Conference, 28 Aug - 1 Sept 2006, Hobart, Tasmania.

Abstract

The presence of the introduced Yabbie Cherax destructor in a number of wild aquatic systems in the Pilbara and Southwest Coast Drainage Divisions of Western Australia is documented. This is of great concern as all native freshwater crayfi shes in Western Australia are endemic and restricted to the southwest while the Pilbara Division has no native species. An introduced, wild population of C. destructor was sampled monthly from the Hutt River (Pilbara Drainage Division) for determination of life-history and reproductive biology. The potential for this species to compete with the native (though also translocated) sympatric Marron Cherax cainii for food resources was also investigated in the system using stable isotope analyses. Proliferation of C. destructor in the Hutt River was attributed to specifi c traits typical of many other invasive crayfi sh species including: attaining fi rst maturity at the end of its fi rst year of life; a protracted spawning period (July to January); relatively high mean ovarian fecundity of 210.2 (±9.24 S.E.); and a rapid growth rate (curvature parameter K = 0.78 and asymptotic orbital carapace length OCL

Publication Type: Conference Item
Murdoch Affiliation: Centre for Fish and Fisheries Research
Conference Website: http://www.asfb.org.au/
Notes: Oral presentation
URI: http://researchrepository.murdoch.edu.au/id/eprint/6003
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