Document ID: chunk:federal_register_of_legislation:F2019L00106:body:0:p7
Version: federal_register_of_legislation:F2019L00106
Segment Type: other
Provision Reference: 
Character Range: 18698–21894

Victoria under the Flora and Fauna Guarantee Act 1988 and 'presumed extinct' in South Australia under the National Parks and Wildlife Act 1972. For up-to-date information on the listing status of this species under relevant state or territory legislation, see http://www.environment.gov.au/cgi-bin/sprat/public/sprat.pl
The Macquarie perch was eligible for listing under the EPBC Act as on 16 July 2000 as it was listed as Endangered under Schedule 1 of the preceding Act, the Endangered Species Protection Act 1992 (Cwlth). The main factors that make the species eligible for listing in the Endangered category are that the Macquarie perch has experienced past decline and the threats impacting the species may not have ceased and that it has a restricted geographic distribution which is severely fragmented and continued decline has been observed at a number of locations in recent years.

    3.3 Stock structure

Macquarie perch has several genetically divergent lineages across its range. Because of morphological and genetic differences between Murray-Darling Basin and eastern Macquarie perch (Hawkesbury-Nepean and Shoalhaven) there were calls for revising the taxonomic status to recognise the Shoalhaven, Hawkesbury-Nepean and Murray-Darling Basin as separate species (Dufty 1986; Faulks et al., 2010; Faulks et al., 2011; Pavlova et al., 2017a; 2017b).
Genetic analysis of complete mitochondrial genome sequences of 25 individuals by Pavlova et al. (2017b) found that differentiation among the Murray-Darling Basin, Hawkesbury-Nepean and Shoalhaven lineages supported emerging speciation, which had been inferred previously (Dufty 1986; Faulks et al., 2011; Pavlova et al., 2017a). However, there is no evidence that reproductive barriers have evolved between the Murray-Darling Basin and the Hawkesbury-Nepean Macquarie perch (Faulks et al., 2011; Pavlova et al., 2017b). A population of Macquarie perch has been established in Cataract Reservoir (Hawkesbury-Nepean system) derived solely from translocated individuals from the Murray-Darling Basin. Some individuals from this population have dispersed downstream of Cataract Dam and have hybridised with the natural Hawkesbury-Nepean lineage occurring in the Cataract River (Faulks et al., 2011; Pavlova et al., 2017b). Genetic analysis of microsatellite markers indicates that this dispersal may still be ongoing (Pavlova et al., 2017a). The Murray-Darling Basin and Hawkesbury-Nepean lineages diverged approximately 385 000 to 119 000 years ago (Pavlova et al., 2017b). There additionally appears to be divergence within the Hawkesbury-Nepean system, with the southern Hawkesbury-Nepean diverging from the northern Hawkesbury-Nepean approximately 191 000 to 58 000 years ago (Pavlova et al., 2017b).
An individual collected from the Kangaroo River (Shoalhaven system), prior to the presumed extinction of the Shoalhaven River lineage was found to be highly differentiated from both the Hawkesbury-Nepean and Murray-Darling Basin lineages (Pavlova et al., 2017b), supporting a long term evolutionary trajectory of the Shoalhaven lineage. Analysis of mitochondrial lineage divergence showed that the Shoalhaven Basin diverged from