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Southern Calamary (Sepioteuthis Australis) Fishery Southern Calamary (Sepioteuthis australis) Fishery Report to PIRSA MA Steer, MT Lloyd and WB Jackson August 2007 SARDI Publication Number F2007/000528-2 SARDI Research Report Series Number 229 Southern Calamary (Sepioteuthis australis) Fishery Report to PIRSA MA Steer, MT Lloyd and WB Jackson August 2007 SARDI Publication Number F2007/000528-2 SARDI Research Report Series Number 229 i This publication may be cited as: Steer MA, Lloyd MT and Jackson WB (2007). Southern Calamary (Sepioteuthis australis) Fishery. Fishery Assessment Report to PIRSA. South Australian Research and Development Institute (Aquatic Sciences), Adelaide, F2007/000528-2. South Australian Research and Development Institute SARDI Aquatic Sciences PO Box 120 West Beach SA 5024 Telephone: (08) 8207 5400 Facsimile: (08) 8207 5406 http://www.sardi.sa.gov.au Disclaimer The authors warrant that they have taken all reasonable care in producing this report. The report has been through the SARDI Aquatic Sciences internal review process, and has been formally approved for release by the Chief Scientist. Although all reasonable efforts have been made to ensure quality, SARDI Aquatic Sciences does not warrant that the information in this report is free from errors or omissions. SARDI Aquatic Sciences does not accept any liability for the contents of this report or for any consequences arising from its use or any reliance placed upon it. © 2007 SARDI Aquatic Sciences This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the author. Printed in Adelaide August 2007 SARDI Aquatic Science Publication No. F2007/000528-2 SARDI Research Report Series No. 229 Author(s): MA Steer, MT Lloyd and WB Jackson Reviewers: G. Ferguson and B. Page Approved by: T. Ward Signed: Date: 17 August 2007 Distribution : PIRSA Fisheries, SARDI Aquatic Sciences library Circulation: Public Domain ii TABLE OF CONTENTS TABLE OF CONTENTS ......................................................................................................................iii LIST OF TABLES .....................................................................................................................................v LIST OF FIGURES..................................................................................................................................vi ACKNOWLEDGEMENTS...................................................................................................................ix 1. EXECUTIVE SUMMARY............................................................................................................1 2. INTRODUCTION..........................................................................................................................3 2.1. Overview.....................................................................................................................................3 2.2. Description of fishery...............................................................................................................4 2.3. Recreational fishery...................................................................................................................5 2.4. Management regulations...........................................................................................................6 2.5. Performance Indicators and Limit reference points............................................................7 2.6. Biology of southern calamary..................................................................................................8 2.6.1. Distribution .........................................................................................................................8 2.6.2. Genetic stocks ......................................................................................................................8 2.6.3. Movement and Migration .....................................................................................................8 2.6.4. Age and Growth..................................................................................................................9 2.6.5. Reproductive Biology...........................................................................................................10 2.6.6. Early Life History.............................................................................................................12 3. COMMERCIAL FISHERY STATISTICS.............................................................................15 3.1. State-wide trends .....................................................................................................................15 3.2. Regional trends ........................................................................................................................18 3.2.1. Far West Coast (GARFIS Block 8, 9, 10)......................................................................20 3.2.2. South West Spencer Gulf (GARFIS Block 29, 30, 31) ...................................................22 3.2.3. Northern Spencer Gulf (GARFIS Block 21, 22, 23).......................................................24 3.2.4. South East Spencer Gulf (GARFIS Block 32, 33)..........................................................26 3.2.5. North West Gulf St. Vincent (GARFIS Block 34, 35) ..................................................28 3.2.6. Kangaroo Island (GARFIS Block 41, 42) .......................................................................30 3.2.7. South Central Gulf St. Vincent (GARFIS Block 41, 42) ...............................................32 3.3. Long-term trends in licence holders.....................................................................................34 4. CALAMARY BY-PRODUCT IN THE SA PRAWN FISHERIES................................37 4.1. Spencer Gulf calamary by-product.......................................................................................38 4.2. Gulf St. Vincent calamary ‘by-product’ scientific surveys ................................................39 4.3. West Coast calamary by-product ..........................................................................................45 5. POPULATION DYNAMICS AND REPRODUCTIVE ECOLOGY...........................46 5.1. Field sampling..........................................................................................................................46 5.2. Size structure............................................................................................................................49 5.3. Age structure............................................................................................................................50 5.4. Size and age at first maturity..................................................................................................52 5.5. Maturity stages .........................................................................................................................52 5.6. Distribution and abundance of eggs.....................................................................................53 6. CALAMARY PRE-RECRUIT INDICES...............................................................................56 6.1. Environmental proxies ...........................................................................................................57 6.2. Egg surveys...............................................................................................................................62 6.3. Trawl ‘pre-recruit’ surveys......................................................................................................63 6.4. Synthesis....................................................................................................................................64 7. PERFORMANCE INDICATORS...........................................................................................67 7.1. Total commercial catch ..........................................................................................................67 7.2. Targeted effort.........................................................................................................................68 7.2.1. Targeted jig effort................................................................................................................68 iii 7.2.2. Targeted haul net effort.......................................................................................................69 7.3. Targeted CPUE .......................................................................................................................70 7.3.1. Targeted jig CPUE ...........................................................................................................70 7.3.2. Targeted haul net CPUE...................................................................................................71 8. GENERAL DISCUSSION..........................................................................................................72 8.1. Available information .............................................................................................................72 8.2. Current Status ..........................................................................................................................73 8.3. Future research ........................................................................................................................74 9. LITERATURE CITED................................................................................................................75
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