Corner Inlet-Nooramunga Fishery Assessment 2012
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Corner Inlet‐Nooramunga Fishery Assessment 2012 Kemp J, Brown L, Bruce T, Bridge N and Conron S June 2013 Fisheries Victoria Assessment Report Series No. 68 If you would like to receive this Author Contact Details: Dr Jodie Kemp information/publication in an Fisheries Victoria accessible format (such as large Fisheries Management & Science Branch print or audio) please call the PO Box 114, Queenscliff Vic 3223 Customer Service Centre on: Authorised by the Victorian Government, National Relay Service/TTY: 1 Spring Street, Melbourne 133 677, or email Printed by Fisheries Victoria, Queenscliff, [email protected] Victoria Published by the Department of Primary The State of Victoria, Department of Primary Industries. Industries, 2013. Copies are available from the website: This publication is copyright. No part may be www.dpi.vic.gov.au/fishing reproduced by any process except in accordance with the provisions of the Copyright Act 1968. General disclaimer This publication may be of assistance to you but Preferred way to cite this publication: the State of Victoria and its employees do not Kemp J, Brown L, Bruce T, Bridge N and Conron guarantee that the publication is without flaw of C (2013). Corner Inlet and Nooramunga Fishery any kind or is wholly appropriate for your Assessment 2012. Fisheries Victoria Assessment particular purposes and therefore disclaims all Report Series No. 68. liability for any error, loss or other consequence which may arise from you relying on any ISSN 1329‐7287 information in this publication. ISBN 978‐1‐74326‐481‐2 (Print) Corner Inlet‐Nooramunga Fishery Assessment 2012 ii Table of Contents Corner Inlet and Nooramunga fishery assessment summary ...................... 1 Types of fisheries .............................................................................................................................................. 1 Commercial fishery ................................................................................................................................................ 1 Recreational fishery ................................................................................................................................................ 1 Management of Fisheries ................................................................................................................................ 2 Fishery assessments ................................................................................................................................................ 2 Corner Inlet Fishery Assessment 2012 .......................................................................................................... 2 Status of the Corner Inlet Fishery .................................................................................................................. 2 Assessment Process ............................................................................................... 5 This report .......................................................................................................................................................... 5 Stock structure of key species ............................................................................. 6 Stock indicators and status key .......................................................................... 7 Assessment figures and tables ............................................................................ 9 Integrating local Knowledge ............................................................................. 27 Overview of assessment data collection methods ........................................ 32 Description of the Corner Inlet‐Nooramunga commercial fishery ........... 33 Overview of management arrangements ........................................................ 34 Key species’ life‐history information .............................................................. 35 Seagrass in Corner Inlet ..................................................................................... 38 Acknowledgements ............................................................................................. 40 References ............................................................................................................. 41 Corner Inlet‐Nooramunga Fishery Assessment 2012 iii List of figures Figure 1. Map of Corner Inlet and Nooramunga showing commercial fishing zones numbered 1 to 5. ...... 9 Figure 2. Trends in annual commercial catch (tonnes) and wholesale market value for the Corner Inlet‐Nooramunga fishery. .............................................................................................................................. 9 Figure 3. Trends in annual commercial fishing effort (days) for the Corner Inlet‐Nooramunga fishery. .............................................................................................................................................................. 10 Figure 4. Trends in annual commercial harvest (tonnes) of key finfish species of the Corner Inlet‐ Nooramunga fishery. ..................................................................................................................................... 11 Figure 5. The proportion of key species’ catch harvested from each fishing zone in Corner Inlet‐ Nooramunga. Data is from 2006/07‒2009/10 combined. ........................................................................... 12 Figure 6. Composition of retained and released catch by recreational anglers from telephone survey data (Ryan et al. 2009; Henry and Lyle 2003) for Corner Inlet. ................................................................. 13 Figure 7. Estimated regional recreational fishing effort from telephone survey data (Henry and Lyle 2003). ................................................................................................................................................................. 13 Figure 8. Annual commercial catch (tonnes) and catch rate (kg/shot) of Australian salmon, and effort (shots) targeting Australian salmon and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. ....................................................................................................................... 14 Figure 9. Annual commercial catch (tonnes) and catch rate (kg/shot) of flounder (greenback and unspecified), and effort (shots) targeting flounder and other species in Corner Inlet‐ Nooramunga by haul seine from 1978/79 to 2010/11. ................................................................................ 15 Figure 10. Annual commercial catch (tonnes) and catch rate (kg/km‐lift) of gummy shark, and effort (km‐lifts) targeting Australian salmon and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. ....................................................................................................................... 16 Figure 11. Annual commercial catch (tonnes) and catch rate (kg/shot) of King George whiting, and effort (shots) targeting King George whiting and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. .............................................................................................................. 17 Figure 12. Length‐frequency distributions of King George whiting harvested by commercial haul seines in Corner Inlet‐Nooramunga from 2006/07 to 2010/11. ................................................................. 18 Figure 13. Age‐frequency distributions of King George whiting harvested by commercial haul seines in Corner Inlet‐Nooramunga from 2003/04 to 2010/11 (excluding 2005/06−2007/08). ........................... 19 Figure 14. Annual commercial catch (tonnes) and catch rate (kg/shot) of silver trevally, and effort (shots) targeting silver trevally and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. ................................................................................................................................. 20 Figure 15. Annual commercial catch (tonnes) and catch rate (kg/shot) of southern calamari, and effort (shots) targeting southern calamari and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. .............................................................................................................. 21 Figure 16. Annual commercial catch (tonnes) and catch rate (kg/shot) of southern sea garfish, and effort (shots) targeting southern sea garfish and other species in Corner Inlet‐Nooramunga by haul seine from 1978/79 to 2010/11. .............................................................................................................. 22 Figure 17. Annual commercial catch (tonnes) and catch rate (kg/km‐lift) of rock flathead, and effort (km‐lifts) targeting rock flathead and other species in Corner Inlet‐Nooramunga by mesh net from 1978/79 to 2010/11. ................................................................................................................................. 23 Figure 18. Length‐frequency distributions of rock flathead harvested by commercial mesh nets in Corner Inlet‐Nooramunga from 2006/07 to 2009/10. ................................................................................. 24 Corner Inlet‐Nooramunga Fishery Assessment 2012 iv Figure 19. Cohort strength distributions of rock flathead harvested by commercial mesh nets in Corner Inlet‐Nooramunga from 1996/97 to 2009/10 (excluding 1997/98, 1999/00−2006/07 and 2008/09)............................................................................................................................................................