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Periwinkle Fishery of Tasmania: Supporting Management and a Profitable Industry

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Periwinkle Fishery of Tasmania: Supporting Management and a Profitable Industry Periwinkle Fishery of Tasmania: Supporting Management and a Profitable Industry J.P. Keane, J.M. Lyle, C. Mundy, K. Hartmann August 2014 FRDC Project No 2011/024 © 2014 Fisheries Research and Development Corporation. All rights reserved. ISBN 978-1-86295-757-2 Periwinkle Fishery of Tasmania: Supporting Management and a Profitable Industry FRDC Project No 2011/024 June 2014 Ownership of Intellectual property rights Unless otherwise noted, copyright (and any other intellectual property rights, if any) in this publication is owned by the Fisheries Research and Development Corporation the Institute for Marine and Antarctic Studies. This publication (and any information sourced from it) should be attributed to Keane, J.P., Lyle, J., Mundy, C. and Hartmann, K. Institute for Marine and Antarctic Studies, 2014, Periwinkle Fishery of Tasmania: Supporting Management and a Profitable Industry, Hobart, August. CC BY 3.0 Creative Commons licence All material in this publication is licensed under a Creative Commons Attribution 3.0 Australia Licence, save for content supplied by third parties, logods and the Commonwealth Coat of Arms. Creative Commons Attribution 3.0 Australia Licence is a standard form licence agreement that allows you to copy, distribute, transmit and adapt this publication provided you attribute the work. A summary of the licence terms is available from creativecommons.org/licenses/by/3.0/au/deed.en. The full licence terms are available from creativecommons.org/licenses/by/3.0/au/legalcode. Inquiries regarding the licence and any use of this document should be sent to: [email protected]. Disclaimerd The authors do not warrant that the information in this document is free from errors or omissions. The authors do not accept any form of liability, be it contractual, tortious, or otherwise, for the contents of this document or for any consequences arising from its use or any reliance placed upon it. The information, opinions and advice contained in this document may not relate, or be relevant, to a readers particular circumstances. Opinions expressed by the authors are the individual opinions expressed by those persons and are not necessarily those of the publisher, research provider or the FRDC. The Fisheries Research and Development Corporation plans, invests in and manages fisheries research and development throughout Australia. It is a statutory authority within the portfolio of the federal Minister for Agriculture, Fisheries and Forestry, jointly funded by the Australian Government and the fishing industry. Researcher Contact Details FRDC Contact Details Name: Dr Jeremy Lyle Address: 25 Geils Court Address: Institute for Marine and Antarctic Studies Deakin ACT 2600 University of Tasmania Phone: 02 6285 0400 Private Bag 49 Fax: 02 6285 0499 Taroona, TAS 7053 Email: [email protected] Phone: (03) 6227 7255 Web: www.frdc.com.au Fax: (03) 6227 8035 Email: [email protected] In submitting this report, the researcher has agreed to FRDC publishing this material in its edited form. Periwinkle Fishery of Tasmania Contents List of Tables......................................................................................................................................... iii List of Figures ....................................................................................................................................... iv Acknowledgments ................................................................................................................................. vi Abbreviations ........................................................................................................................................ vi Executive Summary ............................................................................................................................ vii Introduction ........................................................................................................................................... 1 Tasmanian Commercial Dive Fishery ............................................................................................... 1 The periwinkle ................................................................................................................................... 1 Previous research ............................................................................................................................... 2 Ecology ....................................................................................................................................... 2 Life History ................................................................................................................................. 3 Fisheries ...................................................................................................................................... 3 Need ................................................................................................................................................... 4 Objectives ............................................................................................................................................... 5 Methodology .......................................................................................................................................... 5 Commercial fishery data .................................................................................................................... 5 Logbook data ............................................................................................................................... 5 On-board catch sampling ............................................................................................................ 6 Fisher survey ............................................................................................................................... 6 Fisheries biology ................................................................................................................................ 7 Sites ............................................................................................................................................. 7 Biological measurements ............................................................................................................ 8 Growth ......................................................................................................................................... 8 Gonad maturation and size at maturity........................................................................................ 8 Markets and economics ................................................................................................................... 11 Market survey ............................................................................................................................ 11 Market data and modelling: Sydney Fish Market ..................................................................... 11 Fishery value ............................................................................................................................. 12 Report card ....................................................................................................................................... 12 Results .................................................................................................................................................. 13 Management overview ..................................................................................................................... 13 Fishery operations ............................................................................................................................ 15 Catch and effort ............................................................................................................................... 15 State-wide trends ....................................................................................................................... 15 Regional catch and effort .......................................................................................................... 20 Daily catches ............................................................................................................................. 23 Fisher dynamics ............................................................................................................................... 24 Fisher characterisation and behaviour ....................................................................................... 24 Fisher participation / licensing .................................................................................................. 24 Management changes and current concerns .................................................................................... 25 Zoning and TAC........................................................................................................................ 25 Flexibility regarding the incidental take of a small amount of undersize periwinkles .............. 26 Fisher observations and feedback: fishery limitations, threats and management concerns. ............ 26 Periwinkle habitat and aggregations ......................................................................................... 26 FRDC Final Report Page i Catch and effort ........................................................................................................................ 27 Localised overfishing ..............................................................................................................
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