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Prioritisation of High Conservation Status

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Prioritisation of High Conservation Status PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS Prepared for Department of the Environment, Water, Heritage and the Arts 26 November 2018 PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS Prioritisation of High Conservation Status Mainland Islands PREPARED FOR Department of the Environment, Water, Heritage and the Arts PROJECT NO 09SUTNRM-0002 DATE 26 November 2018 © ECO LOGICAL AUSTRALIA P T Y L T D ii PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS DOCUMENT TRACKING ITEM DETAIL Project Name Mainland Island Conservation Status Prioritisation Project Number 09SUTNRM-0002 File location Mainland_islands_report_FINAL.doc Prepared by Dr Ailsa Kerswell Joanne Daly Approved by Darren James Status Final Version Number v1 Last saved on 26 November 2018 This document has been printed on 100% recycled paper. ACKNOWLEDGEMENTS This document has been prepared by Eco Logical Australia Pty Ltd with support from the Department of the Environment, Water, Heritage and the Arts. Special thanks go to the staff from the Environmental Biosecurity Section and ERIN, in particular Julie Quinn, Wayne Gregson, Karl Bossard, Simon Bennett and Lisa Winsemius. ELA would also like to thank attendees of the workshop for their input into the definition of a mainland island. Members of the VPC and state/territory agencies must also be thanked for their input regarding the location of additional mainland islands. Disclaimer This document may only be used for the purpose for which it was commissioned and in accordance with the contract between Eco Logical Australia Pty Ltd and DEWHA. The scope of services was defined in consultation DEWHA (Wayne Gregson), by time and budgetary constraints imposed by the client, and the availability of reports and other data on the subject area. Changes to available information, legislation and schedules are made on an ongoing basis and readers should obtain up to date information. Eco Logical Australia Pty Ltd accepts no liability or responsibility whatsoever for or in respect of any use of or reliance upon this report and its supporting material by any third party. Information provided is not intended to be a substitute for site specific assessment or legal advice in relation to any matter. Unauthorised use of this report in any form is prohibited. © ECO LOGICAL AUSTRALIA P T Y L T D i PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS Contents Contents ..................................................................................................................................................... ii List of Figures ............................................................................................................................................ iv List of Tables ............................................................................................................................................. iv Abbreviations ............................................................................................................................................. v Executive Summary .................................................................................................................................. 1 1 Introduction .............................................................................................................................. 3 1.1 Background .............................................................................................................................. 3 1.2 Project aims ............................................................................................................................. 3 1.3 Scope ....................................................................................................................................... 3 2 Identifying Mainland Islands .................................................................................................... 5 2.1 Introduction .............................................................................................................................. 5 2.2 Data ......................................................................................................................................... 5 2.3 Analyses .................................................................................................................................. 6 2.3.1 Stage 1 Analyses ............................................................................................................... 6 2.3.2 Weighting conservation values .......................................................................................... 8 2.3.3 Stage 2 Analyses ............................................................................................................... 8 2.3.4 State/Territory Consultation ............................................................................................... 8 2.4 Results ................................................................................................................................... 10 2.5 Discussion ............................................................................................................................. 12 2.5.1 Limitations of the analysis ............................................................................................... 12 3 Prioritisation Analysis ............................................................................................................ 14 3.1 Introduction ............................................................................................................................ 14 3.2 Methods ................................................................................................................................. 14 3.2.1 Determining Conservation Value ..................................................................................... 14 3.2.2 Determining Threat Level ................................................................................................ 15 3.2.3 Island Priority Level ......................................................................................................... 19 3.2.4 Ranking Islands ............................................................................................................... 19 3.3 High prioritiy mainland islands ............................................................................................... 20 © ECO LOGICAL AUSTRALIA P T Y L T D ii PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS 3.4 Discussion ............................................................................................................................. 25 3.4.1 Limitations of the analysis ............................................................................................... 25 4 Analysis of management regimes ......................................................................................... 26 4.1 Pest management in australia ............................................................................................... 26 4.1.1 Pest management at a national level .............................................................................. 26 4.1.2 Pest management at a state/territory level ...................................................................... 27 4.1.3 Vertebrate Pests as Key Threatening Processes ........................................................... 32 4.2 Best practise pest management principles ............................................................................ 33 4.3 Summary of pest management for mainland islands ............................................................ 34 5 Summary of key findings ....................................................................................................... 36 6 Recommendations ................................................................................................................. 37 6.1 Pest management.................................................................................................................. 37 6.2 This and future studies .......................................................................................................... 37 6.3 Data and resources ............................................................................................................... 38 References .............................................................................................................................................. 39 Appendix A: Top 100 Ranked Islands ..................................................................................................... 42 Appendix B: Mainland Island Fact Sheets .............................................................................................. 45 © ECO LOGICAL AUSTRALIA P T Y L T D iii PRIORITISATION OF HIGH CONSERVATION STATUS MAINLAND ISLANDS List of Figures Figure 1: Candidate areas for mainland islands. ........................................................................................ 7 Figure 2: Mainland islands ....................................................................................................................... 11 Figure 3: Priority level of all mainland islands .......................................................................................... 22 Figure 4: Top 100 ranked islands ............................................................................................................. 23 Figure 5: Conservation value and threat levels for all mainland islands .................................................
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