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Status reports of the fisheries and aquatic resources of Western Australia 2011/12 PDF

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Status reports of the fisheries and aquatic resources of Western Australia 2011/12 State of the fisheries Status reports of the fisheries and aquatic resources of Western Australia 2011/12 State of the fisheries Edited by W.J. Fletcher and K. Santoro Produced by the Fisheries Research Division based at the WA Fisheries and Marine Research Laboratories Published by the Department of Fisheries 3rd Floor, The Atrium 168 St Georges Terrace Perth WA 6000 Website: www.fish.wa.gov.au ABN: 55 689 794 771 ISSN 2200-7849 (Print) ISSN 2200-7857 (Online) Suggested citation format: Entire report: Fletcher, W.J. and Santoro, K. (eds). 2012. Status Reports of the Fisheries and Aquatic Resources of Western Australia 2011/12: The State of the Fisheries. Department of Fisheries, Western Australia. Individual status report: Hart, A., Brown, J., Fabris, F. and Warnbrunn, A. 2012. Roe’s Abalone Fishery Status Report. In: Status Reports of the Fisheries and Aquatic Resources of Western Australia 2011/12: The State of the Fisheries eds. W.J. Fletcher and K. Santoro, Department of Fisheries, Western Australia, pp. 49-61. CONTENTS OVERVIEW FROM THE DIRECTOR Exmouth Gulf Prawn Managed Fishery GENERAL ........................................................... 1 Status Report ............................................ 140 EDITOR'S INTRODUCTION ............................. 2 Gascoyne Demersal Scalefish Fishery HOW TO USE THIS VOLUME ......................... 3 Status Report ............................................ 146 OVERVIEW OF THE STATUS OF KEY Inner Shark Bay Scalefish Fishery Status ECOLOGICAL RESOURCES (ASSETS) .......... 9 Report ...................................................... 154 ECOSYSTEM STRUCTURE AND Gascoyne Coast Blue Swimmer Crab BIODIVERSITY .............................................. 9 Fishery Status Report ............................... 161 GENERAL ENVIRONMENTAL AQUACULTURE ........................................ 167 IMPACTS....................................................... 10 COMPLIANCE AND COMMUNITY WEST COAST BIOREGION ............................ 25 EDUCATION .............................................. 167 ABOUT THE BIOREGION ........................... 25 NORTH COAST BIOREGION ...................... 171 SUMMARY OF FISHING AND ABOUT THE BIOREGION ........................ 171 AQUACULTURE ACTIVITIES ................... 25 SUMMARY OF FISHING AND ECOSYSTEM MANAGEMENT ................... 25 AQUACULTURE ACTIVITIES ................. 171 ECOSYSTEM BASED FISHERIES ECOSYSTEM MANAGEMENT ................ 172 MANAGEMENT ........................................... 26 ECOSYSTEM BASED FISHERIES INTRODUCED PESTS STATUS REPORT .. 36 MANAGEMENT ......................................... 172 FISHERIES .................................................... 37 INTRODUCED PESTS STATUS REPORT 178 West Coast Rock Lobster Fishery Status FISHERIES .................................................. 179 Report ......................................................... 37 North Coast Prawn Managed Fisheries Roe’s Abalone Fishery Status Report ........ 49 Status Report ............................................ 179 Abrolhos Islands and Mid West, South North Coast Nearshore and Estuarine West Trawl Managed Fisheries and Fishery Status Report ............................... 191 South Coast Trawl Fishery Status Report .. 62 North Coast Demersal Fisheries Status West Coast Blue Swimmer Crab Fishery Report ...................................................... 198 Status Report .............................................. 68 Mackerel Managed Fishery Report: West Coast Deep Sea Crab (Interim) Statistics Only .......................................... 218 Managed Fishery Status Report ................. 76 Northern Shark Fisheries Status Report .. 222 West Coast Nearshore and Estuarine Pearl Oyster Managed Fishery Status Finfish Resources Status Report ................ 80 Report ...................................................... 229 West Coast Purse Seine Fishery Report: Beche-de-mer Fishery Status Report ....... 235 Statistics Only ............................................ 98 North Coast Crab Fishery Status Report . 239 West Coast Demersal Scalefish Resource AQUACULTURE ........................................ 246 Status Report ............................................ 100 COMPLIANCE AND COMMUNITY Octopus Fishery Status Report ................. 111 EDUCATION .............................................. 247 AQUACULTURE ........................................ 116 SOUTH COAST BIOREGION ....................... 250 COMPLIANCE AND COMMUNITY ABOUT THE BIOREGION ........................ 250 EDUCATION ............................................... 117 SUMMARY OF FISHING AND GASCOYNE COAST BIOREGION ............... 121 AQUACULTURE ACTIVITIES ................. 250 ABOUT THE BIOREGION ......................... 121 ECOSYSTEM MANAGEMENT ................ 250 SUMMARY OF FISHING AND ECOSYSTEM BASED FISHERIES AQUACULTURE ACTIVITIES ................. 121 MANAGEMENT ......................................... 251 ECOSYSTEM MANAGEMENT ................. 122 FISHERIES .................................................. 255 ECOSYSTEM BASED FISHERIES South Coast Crustacean Fisheries MANAGEMENT ......................................... 122 Report: Statistics Only ............................. 255 FISHERIES .................................................. 130 Greenlip/Brownlip Abalone Fishery Shark Bay Prawn and Scallop Managed Status Report ............................................ 258 Fisheries Status Report............................. 130 South Coast Nearshore and Estuarine Finfish Resources Status Report .............. 266 STATUS REPORTS OF THE FISHERIES AND AQUATIC RESOURCES OF WESTERN AUSTRALIA 2011/12 i South Coast Purse Seine Fishery Report: COMPLIANCE AND COMMUNITY Statistics Only .......................................... 279 EDUCATION .............................................. 321 Temperate Demersal Gillnet and STATEWIDE .................................................. 324 Demersal Longline Fisheries Status ECOSYSTEM BASED FISHERIES Report ....................................................... 282 MANAGEMENT ......................................... 324 South Coast Demersal Scalefish FISHERIES .................................................. 326 Resource Report: Statistics Only ............. 295 Marine Aquarium Fish Managed Fishery AQUACULTURE ........................................ 298 Report: Statistics Only ............................. 326 COMPLIANCE AND COMMUNITY Specimen Shell Managed Fishery Status EDUCATION ............................................... 298 Report ...................................................... 328 NORTHERN INLAND BIOREGION............. 301 APPENDICES ................................................. 331 ABOUT THE BIOREGION ......................... 301 APPENDIX 1 ............................................... 331 SUMMARY OF FISHING AND Fisheries Research Division staff AQUACULTURE ACTIVITIES ................. 301 publications 2010/11 ................................ 331 ECOSYSTEM MANAGEMENT ................. 301 APPENDIX 2 ............................................... 335 ECOSYSTEM BASED FISHERIES Table of catches from fishers’ statutory MANAGEMENT ......................................... 301 monthly returns for 2010/11 .................... 335 FISHERIES .................................................. 303 APPENDIX 3 ............................................... 342 Lake Argyle Silver Cobbler Fishery Research Division - Other Activities ....... 342 Report: Statistics Only ............................. 303 Activities of the Pemberton Freshwater AQUACULTURE ........................................ 305 Research Centre 2011/12 ......................... 342 COMPLIANCE AND COMMUNITY Activities of the Fish Health Unit during EDUCATION ............................................... 306 2011/12 .................................................... 345 SOUTHERN INLAND BIOREGION ............. 309 Activities of the Biosecurity Group ABOUT THE BIOREGION ......................... 309 during 2011/12 ......................................... 346 SUMMARY OF FISHING AND Indian Ocean Territories Fishery Status AQUACULTURE ACTIVITIES ................. 309 Report ...................................................... 348 ECOSYSTEM MANAGEMENT ................. 309 Finfish Ageing Laboratory ...................... 354 ECOSYSTEM BASED FISHERIES APPENDIX 4 ............................................... 357 MANAGEMENT ......................................... 309 Annual performance for commercial FISHERIES .................................................. 313 fisheries subject to export approval under Licensed South-West Recreational the Commonwealth Government’s Freshwater Angling Fishery Report: Environment Protection and Biodiversity Statistics only ........................................... 313 Conservation Act 1999 ............................ 357 Licensed Recreational Marron Fishery APPENDIX 5 ............................................... 366 Report ....................................................... 315 Fisheries Research Division staff adjunct AQUACULTURE ........................................ 321 positions and supervision of students ...... 366 GLOSSARY OF ACRONYMS ................... 368 ii DEPARTMENT OF FISHERIES OVERVIEW FROM THE DIRECTOR GENERAL The Status Reports of the Fisheries and Aquatic Resources of assessed as posing only negligible or minor risks to bycatch Western Australia provide the public with an annual update species, protected species, habitats or the broader ecosystem. on the state of the fish and other aquatic resources of Western The small number of fisheries which have generated risks to Australia managed by the Department. These reports outline these non-‘capture species’, and therefore require direct the cumulative risk status for each of the ecological resources management, continue to meet their annual performance (assets) within WA’s six Bioregions using an Ecosystem- targets or have targeted research programs to reduce their Based Fisheries Management (EBFM) approach. This world interactions. The only ecosystems and component species in leading approach details all the fisheries and fishing-related WA considered to be at unacceptable levels continue to be activities within each of the Bioregions but also includes the estuarine and river systems of the south west region. analyses and reports on the activities and processes These risks are not the result of fishing related activities. undertaken by the Department to manage the broader aquatic The report also documents that the vast majority of Western environment, such as habitats and ecosystems. Australia’s significant fisheries continue to be in a healthy The Status Reports of the Fisheries and Aquatic Resources of condition. For the first time all (100%) of managed fisheries Western Australia essentially summarise the outcomes of had catches that are considered to be appropriate based on the Departmental activities undertaken during 2011/12 and status of the stocks involved and the current environmental preceding years. It documents recent changes to and market conditions. Moreover, approximately 94% of management or policy settings, compliance and education commercial fisheries are now targeting stocks where no operations, the assessment and monitoring of stock levels and additional management is required to either maintain or ecosystem condition. This document should, therefore, achieve an acceptable breeding stock level. The research provide a valuable reference point for the current status of program to examine the status of the herring stocks in south Western Australian aquatic resources including those of west WA will be soon available to determine whether this major importance to the commercial and recreational fishing stock is at acceptable levels. sectors, the aquaculture industry, the tourism industry, and A summary report from this document is included in the for those in the community interested in the overall health of Department’s Annual Report to Parliament, which includes the aquatic environment. the Department’s non-financial (fishery) performance Western Australia is one of the first fisheries jurisdictions in indicators. The Annual Report is available through the the world to fully implement a comprehensive and practical Department’s website (www.fish.wa.gov.au). EBFM framework. EBFM provides a thorough, risk based I would like to take this opportunity to express my framework for the overall management of aquatic resources appreciation to all Departmental staff who contributed to this because it explicitly considers all ecological resources and important, annual performance review of WA’s aquatic community values within a Bioregion to determine which resources. In addition, many commercial and recreational may require direct management intervention. This approach fishers, science collaborators and other stakeholders is expected to provide the Department with a good basis for throughout the State are to be commended for their positive progressing the third party certification initiative that has support for the Department’s monitoring and research recently been announced by the WA Government. programs and management initiatives, without which such a It is pleasing that a key finding from these reports is that the high level of sustainability would not be achieved. risk to most aquatic ecological resources in Western Australia are currently at acceptable levels. Given the comprehensive systems of management that are in place, fishing in WA does not present an unacceptable risk to the marine, estuarine and freshwater ecosystems underpinning them. The fishing methods that may affect the habitat (e.g. trawling) are highly Stuart Smith regulated with over 90% of WA coastline effectively Director General protected from these types of activities. The overwhelming October 2012 majority of Western Australian fisheries have also been STATUS REPORTS OF THE FISHERIES AND AQUATIC RESOURCES OF WESTERN AUSTRALIA 2011/12 1 EDITOR'S INTRODUCTION The Status Reports of the Fisheries and Aquatic Resources of access to vessels and information which are essential to the Western Australia 2011/12 uses the Ecosystem Based generation of many of the status reports presented in this Fisheries Management (EBFM) framework which is now the document. The input from other science groups from WA, basis for management of Western Australia’s aquatic other parts of Australia and internationally is also resources (Fletcher, et al., 2010, 20121). Consequently, the acknowledged. There has been an increasing trend over the format for this document is fully consistent with the past decade for collaborative research projects to be implementation of a risk-based approach to resource undertaken to assist in the development of new monitoring management (Fletcher 20122). and assessment techniques or to help further our understanding of issues that affect management (e.g. The introductory section for each Bioregion outlines each of determining the causes of the recent low rock lobster the key ecological resources (assets) within the region and puerulus settlement levels). summarises their current overall (cumulative) risk status. The assets that are examined in each bioregion include each While the Status Reports of the Fisheries and Aquatic of the IMCRA3 meso-scale ecosystems plus the key habitats, Resources of Western Australia 2011/12 provides the general captured species and protected species categories. There is public, interested fishers and other stakeholders with a ready also a section for the external drivers, such as climate change, reference source, it also meets the reporting requirements of coastal development and introduced pests/diseases, which the Department, including the need to annually report on the may affect the Department’s ability to effectively manage ‘state of fisheries managed under’ the FRMA4 to the Western WA’s aquatic resources. Australian Parliament and to the Commonwealth Government, on the performance of fisheries that are relevant For each Bioregion the set of individual fishery reports are under their EPBC Act. now resource-based rather than activity (sector) based. Each of the different fisheries accessing the same category of The report is directly accessible on the Department’s website ecological assets is now covered in a single report (e.g. West (www.fish.wa.gov.au/docs/sof), where users are encouraged Coast Nearshore and Estuarine Finfish) with each report to download relevant sections for personal use. If quoting containing descriptions of all the commercial and recreational from the document, please give appropriate acknowledgment activities.Taking a Bioregional approach to the management using the citation provided at the front of the report. of ecological assets ensures that the aggregate catch Finally, I would like to thank all of my Departmental harvested from each stock is identified to enable their colleagues across all Divisions who have assisted in the cumulative effect to be assessed. This approach is also production of this volume and its many status reports. Thanks consistent with the Department’s IFM initiative and the are once again due to Ms Karen Santoro who has managed dtructure of the reports should enable readers to more easily both the coordination and publication processes to enable the assess the interrelationships between fisheries and how the production of this important report. catch is shared among sectors. The long-standing involvement by our commercial, recreational and aquaculture stakeholders in specific research projects and monitoring programs is recognised. This includes the provision of logbook data, biological samples, Dr Rick Fletcher Executive Director Research 1 W.J. Fletcher, J. Shaw, S.J. Metcalf & D.J. Gaughan October 2012. (2010) An Ecosystem Based Fisheries Management framework: the efficient, regional-level planning tool for management agencies. Marine Policy 34 (2010) 1226– 1238 Fletcher, W.J., Gaughan, D.J., Shaw, J. and Metcalf, S.J. (2012) Ecosystem Based Fisheries Management: Case Study Report West Coast Bioregion. Fisheries Research Report No. 212, Department of Fisheries, Western Australia 104p. 2 Fletcher, W.J., (2012) National Application of Sustainability Indicators for Australian Fisheries- Part 2: Ecosystem based frameworks for aquaculture, multi-fishery and international applications. FRDC Report – Project 2000/145 Part 2. Fisheries Research Report No 235 Department of Fisheries, Western Australia. 3 Commonwealth of Australia (2006) A guide to the Integrated Marine and Coastal Regionalisation of Australia - version 4.0 June 2006 (IMCRA v4.0). http://www.environment.gov.au/coasts/mbp/publications/im cra/pubs/imcra4.pdf 4 Section 263 of the FRMA. 2 DEPARTMENT OF FISHERIES HOW TO USE THIS VOLUME To obtain full benefit from the information provided in this It now also has a section that outlines the current risk status edition of the Status Reports of Fisheries and Aquatic of each of the high level, ecological resources/assets located Resources of Western Australia, readers need to understand within each Bioregion (see below). various terms and headings used in the text and summarised in the fishery status overview table (which also appeared in the Department of Fisheries Annual Report 2011/12 to Assessment of Regional Level Parliament) and especially those associated with the Ecological Resources (Assets) in ecological resource level reports. each Bioregion The terms and headings are a combination of the reporting structures first outlined in the national Ecologically Consistent with the adoption of the EBFM framework for Sustainable Development (ESD) reporting structure (Fletcher each bioregion we have identified the high level set of et al. 2002)1, plus the more recent Ecosystem Based Fisheries ecological resources/assets that are to be managed under the Management (EBFM) framework (Fletcher et al. 2010)2 and FRMA (see Introduction Figure 2). The ecological Resource Assessment Framework (DoF, 2011)3. In addition resources/assets in each Bioregion include the ecosystems to the explanations provided below, acronyms are expanded and their constituent habitats, captured species and protected at their first occurrence in a section of the text and are also species. The potential complexity of EBFM is dealt with by listed in a glossary at the end of the volume. using a step-wise, risk-based approach to integrate the individual issues identified and information gathered into a form that can be used by the Department. Similarly, the Bioregions levels of knowledge needed for each of the issues only need As noted above, with the adoption of the EBFM approach, to be appropriate to the risk and the level of precaution readers need to note the fully bioregional structure of this adopted by management. Implementing EBFM does not, report. A ‘Bioregion’ refers to a region defined by common therefore, automatically generate the need to collect more oceanographic characteristics in its marine environment or by ecological, social or economic data or require the climate/rainfall characteristics in its inland river systems. development of complex ‘ecosystem’ models, it only requires the consideration of each of these elements to determine The marine bioregional boundaries used here are broadly which (if any) required direct management to achieve consistent with “A guide to The Integrated Marine and acceptable performance. Full details of how the EBFM Coastal Regionalisation of Australia” - version 4.0 June 2006 process is undertaken are presented in Fletcher et al. (2012)5 (IMCRA v4.0)4 except for the inclusion of the Gascoyne with a summary description outlined below. Coast as a separate Bioregion, reflecting its nature as the transition zone between tropical and temperate waters. Ecosystems: Within each Bioregion, one or more ecosystems, as defined by the IMCRA process, were The precise boundaries of the Bioregions reflect functional identified with some of these further divided into estuarine geographic separations and data recording systems. Each and marine ecosystems where relevant. individual Bioregion has been provided with a general introduction outlining the main features of its aquatic Habitats: The habitat assets in each Bioregion were divided environment, plus the major commercial and recreational into estuarine and marine categories and again where fisheries and aquaculture industries that operate in the area. necessary the latter category was further divided into nearshore and offshore components. Captured Fish: The captured fish were subdivided into finfish, crustaceans and molluscs with each of these further divided into estuarine/embayments, nearshore, inshore and offshore demersal and pelagic (finfish only) suites (see also 1 Fletcher, W.J., Chesson, J., Fisher, M., Sainsbury, K.J., DoF, 2011). Hundloe, T., Smith, A.D.M. and Whitworth, B. 2002. Protected Species: This category was subdivided into National ESD reporting framework for Australian fisheries: protected ‘fish’ (e.g. White Sharks) and protected ‘non-fish’ The ‘how to’ guide for wild capture fisheries. Fisheries Research and Development Corporation (FRDC) project as defined in the FRMA (e.g. mammals). 2000/145, ESD Reporting and Assessment Subprogram, Fisheries Research and Development Corporation, Canberra. 2 Fletcher, W.J., Shaw, J., Metcalf, S.J. & D.J. Gaughan (2010) An Ecosystem Based Fisheries Management framework: the efficient, regional-level planning tool for management agencies. Marine Policy 34 (2010) 1226–1238 5 Fletcher, W.J., (2012) National Application of Sustainability 3 Department of Fisheries (2011) Resource Assessment Indicators for Australian Fisheries- Part 2: Ecosystem Framework for Finfish Resources in Western Australia. based frameworks for aquaculture, multi-fishery and Fisheries Occasional Publication. No. 85 24pp. international applications. FRDC Report – Project 4http://www.environment.gov.au/coasts/mbp/publications/imcra 2000/145 Part 2. Fisheries Research Report No 235 /pubs/imcra4.pdf Department of Fisheries, Western Australia. STATUS REPORTS OF THE FISHERIES AND AQUATIC RESOURCES OF WESTERN AUSTRALIA 2011/12 3 HOW TO USE THIS VOLUME Risk Assessment Status environmental effects or recruit survival, not the level of the breeding stock. The risks associated with each individual ecological asset are Recovering: reflects situations where the parental biomass examined separately using formal qualitative risk assessment has previously been depleted to unacceptable levels by (consequence x likelihood) or more-simple problem assessment processes, as detailed in Fletcher (2005, 2010)1. fishing or some other event (e.g. the virus attacks on pilchards in the 1990s) but is now considered to be This enables the analysis of risk (using a five year time recovering at an acceptable rate due to management action horizon) for objectives related to captured species, habitat and/or natural processes. and community structure/ecosystem sustainability, plus social and economic outcomes to be completed in a practical Inadequate: reflects situations where excessive fishing and consistent manner (Introduction Table 1). pressure (catch) or some external event has caused parental biomass to fall to levels where the breeding stock is depleted The accepted international definition of risk is “the to levels that may affect recruitment and management of the uncertainty associated with achieving objectives” (ISO, 2009)2, therefore any uncertainties from a lack of specific stock is not currently in an acceptable recovery phase (often called recruitment overfished if caused by fishing). data are explicitly incorporated into the assessment enabling the calculation of risk to be completed with whatever data are available. All risk scoring considers both current level of Retained Species (Stock activities and management controls already in place or planned. Assessment Methods) Within each Bioregion, the EBFM process initially identified In only some cases is the breeding stock directly measured. hundreds of separate ecological assets, social, economic and In most cases a variety of indirect measures are used. Each of governance issues and risks3. This complexity has been the status reports now clearly identifies what type of stock addressed by first assessing each of the individual risks and assessment method(s) have been used to determine the status then consolidating these into bioregional or category level of stocks. The specific methods used for monitoring and risks. The Department’s primary objective is to manage the assessment vary among stocks and indicator species which is sustainability of the community’s ecological assets from affected by many factors including the level of ecological which economic or social outcomes are generated. Therefore risk, the biology and the population dynamics of the relevant the various ecological, social and economic risks and values species; the type, size and value of the fishery exploiting the associated with each of these ecological assets are integrated species; data availability and historical level of monitoring. using a multi-criteria analysis into approximately 80 The methods therefore vary from the relatively simple Departmental-level priorities distributed across the six analysis of catch levels and catch rates, through to more Bioregions. sophisticated analyses that involve sampling of the catch (fishing mortality), direct surveys up to highly complex and expensive age structured simulation models. The range of Breeding stock status methods have been categorised into five broad levels: The assessments of breeding stock for captured species are Level 1 Catch data only undertaken using a number of techniques to determine if the Level 2 Level 1 plus fishery-dependent effort or stock is considered to be at an adequate level or not (see other relative abundance data below). Level 3 Levels 1 and/or 2 plus fishery-dependent Adequate: reflects levels of parental biomass of a stock biological sampling of landed catch (e.g. where annual variability in recruitment of new individuals average size; fishing mortality, etc. (recruits) to the stock is considered to be mostly a function of estimated from representative samples) Level 4 Levels 1, 2 or 3 plus fishery-independent surveys of relative abundance, 1 Fletcher W.J. (2005) Application of Qualitative Risk exploitation rate, recruitment etc. Assessment Methodology to Prioritise Issues for Fisheries Level 5 Levels 1 to 3 and/or 4 integrated within a Management. ICES Journal of Marine Research 2005; simulation, stock assessment model. 62:1576-1587 Fletcher W.J. (2010) Planning processes for the management Multi species assessments: For each marine bioregion, of the tuna fisheries of the Western and Central Pacific each species of finfish and invertebrate is now allocated to Region using an Ecosystem Approach. Forum Fisheries one of five ‘suites’ estuarine, nearshore, inshore demersal, Agency, Honiara. Facilitators version 6.1 January 2010, offshore demersal or pelagic (DoF, 20114). For each of these 61pp http://www.fisheries- suites one or more ‘indicator species’ (which in general esd.com/a/pdf/EAFM%20BASED%20GUIDE%20FOR%20 usually includes the most vulnerable species in the suite) TMP%20DEVELOPMENT%20v6%201.pdf have been selected to reflect the status of the entire suite. If 2 AS/NZS ISO 31000 (2009) Risk management – Principles one or more indicator species is considered to be at risk, the and guidelines. Sydney, Australia: Standards Australia. entire suite is considered to be at risk. 3 Fletcher, W.J., Shaw, J., Gaughan, D.J. and Metcalf, S.J. 2011 Ecosystem Based Fisheries Management case study report – West Coast Bioregion. Fisheries Research Report 4 Department of Fisheries (2011) Resource Assessment No. 225. Department of Fisheries, Western Australia. Framework for Finfish Resources in Western Australia. 116pp. Fisheries Occasional Publication. No. 85 24pp. 4 DEPARTMENT OF FISHERIES

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Produced by the Fisheries Research Division based at the WA Fisheries and Marine Research Laboratories. Published . Shark Bay Prawn and Scallop Managed. Fisheries .. on the state of the fish and other aquatic resources of Western risk to most aquatic ecological resources in Western Australia.
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