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Draft National Recovery Plan for the Macquarie Perch (Macquaria Australasica)

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Draft National Recovery Plan for the Macquarie Perch (Macquaria Australasica) Draft National Recovery Plan for the Macquarie Perch (Macquaria australasica) March 2017 The Species Profile and Threats Database pages linked to this recovery plan is obtainable from: http://www.environment.gov.au/cgi-bin/sprat/public/sprat.pl © Commonwealth of Australia 2017 Draft National Recovery Plan for Macquarie Perch (Macquaria australasica) is licensed by the Commonwealth of Australia for use under a Creative Commons Attribution 4.0 International licence with the exception of the Coat of Arms of the Commonwealth of Australia, the logo of the agency responsible for publishing the report, content supplied by third parties, and any images depicting people. For licence conditions see: https://creativecommons.org/licenses/by/4.0/ This report should be attributed as ‘Draft National Recovery Plan for Macquarie Perch (Macquaria australasica), Commonwealth of Australia 2017’. The Commonwealth of Australia has made all reasonable efforts to identify content supplied by third parties using the following format ‘© Copyright, [name of third party] ’. Disclaimer While reasonable efforts have been made to ensure that the contents of this publication are factually correct, the Commonwealth does not accept responsibility for the accuracy or completeness of the contents, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the contents of this publication. General Acknowledgements The Department of the Environment and Energy is grateful to the organisations and individuals who contributed to or provided information for the preparation of this draft recovery plan and were or are still involved in implementing conservation and management actions that benefit Macquarie perch. In particular, the Department acknowledges the considerable input of the New South Wales Department of Primary Industries who provided much of the information contained within this draft recovery plan. Additionally, the Department acknowledges the effort provided by researchers and conservation experts, including academics, Non-Government Organisations, Australian Government and State Government staff, and members of the public, who contributed to and provided advice on the recovery plan’s preparation. Particularly, this extends to the participants of the workshop held to discuss and review the recovery plan and actions required. Images credits Cover page: Macquarie perch (Macquaria australasica). Luke Pearce, New South Wales Department of Primary Industries. 2 CONTENTS Tables & figures ...........................................................................................................................5 1 Summary ...........................................................................................................................6 2 Introduction .....................................................................................................................10 3 Species Information .......................................................................................................11 3.1 Names ................................................................................................................................11 3.2 Stock structure ...................................................................................................................11 3.3 Description .........................................................................................................................13 4 Biology and Ecology ......................................................................................................13 4.1 Age and growth ..................................................................................................................13 4.2 Habitat ................................................................................................................................14 4.3 Reproductive biology ..........................................................................................................15 4.4 Behaviour ...........................................................................................................................16 4.5 Diet .....................................................................................................................................17 5 Distribution and Populations .........................................................................................18 5.1 Historical distribution and abundance ................................................................................19 5.2 Present natural distribution and abundance .......................................................................19 5.3 Translocated populations ...................................................................................................22 5.4 Breeding and stocking ........................................................................................................23 6 Decline and Threats ........................................................................................................25 6.1 Decline ...............................................................................................................................25 6.2 Threats ...............................................................................................................................29 6.2.1 Habitat degradation .....................................................................................................29 6.2.2 Alien fish ......................................................................................................................32 6.2.3 Barriers to fish movement ............................................................................................34 6.2.4 Altered flow and thermal regimes ................................................................................35 6.2.5 Disease ........................................................................................................................37 6.2.6 Illegal/Incidental capture ..............................................................................................39 6.2.7 Chemical water pollution .............................................................................................39 6.2.7 Climate change ............................................................................................................40 7 Recovery Objectives and Strategies .............................................................................42 7.1 Recovery plan objective .....................................................................................................42 7.2 Recovery plan strategies ....................................................................................................42 8 Actions to Achieve the Objective ..................................................................................42 Strategy 1 – Conserve existing Macquarie perch populations .................................................43 Strategy 2 – Protect and restore Macquarie perch habitat .......................................................44 Draft National Recovery Plan for the Macquarie Perch (Macquaria australasica) 3 Strategy 3 – Investigate threats to Macquarie perch populations and habitats ........................44 Strategy 4 – Establish additional Macquarie perch populations. ..............................................45 Strategy 5 – Improve understanding of the biology and ecology of the Macquarie perch, and its distribution and abundance .................................................................................................46 Strategy 6 – Increase participation by community groups in Macquarie perch conservation ...47 9 Duration and Cost of the Recovery Process ................................................................48 10 Current Management Practices .....................................................................................49 11 Effects on other Native Species and Biodiversity Benefits ........................................50 12 Social, Economic and Cultural considerations ...........................................................50 13 Affected Interests............................................................................................................51 14 Consultation ....................................................................................................................52 15 References ......................................................................................................................54 Draft National Recovery Plan for the Macquarie Perch (Macquaria australasica) 4 TABLES & FIGURES Figure 1: Typical adult Macquarie perch from the Murray-Darling Basin. ...................................12 Figure 2: Typical adult Macquarie perch from the Hawkesbury-Nepean system........................12 Figure 3: Current and historical distribution of Macquarie perch (Macquaria australasica) in south-eastern Australia.........................................................................................................18 Table 1: Major fish barriers by catchment ...................................................................................34 Table 2: Strategy 1 Actions .........................................................................................................43 Table 3: Strategy 2 Actions .........................................................................................................44 Table 4: Strategy 3 Actions .........................................................................................................44
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