DOCSLIB.ORG

Silver Trevally (Pseudocaranx Georgianus)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Silver Trevally (Pseudocaranx Georgianus) I & I NSW WILD FISHERIES RESEARCH PROGRAM Silver Trevally (Pseudocaranx georgianus) EXPLOITATION STATUS GROWTH OVERFISHED Minimum legal length (MLL) of 30 cm total length was implemented in September 2007 but recent size composition data indicate silver trevally should still be considered ‘growth overfished’. Status should be reviewed after the impact of the MLL implementation has been fully assessed. SCIENTIFIC NAME STANDARD NAME COMMENT Pseudocaranx georgianus silver trevally Was recently known as P. dentex. Pseudocaranx georgianus Image © Bernard Yau Background samples from Botany Bay between December and August, however the life history of juvenile Recent research determined that the silver trevally is poorly known. trevally in south-eastern Australian and northern New Zealand waters is distinct from Silver trevally is a relatively long lived, slow the larger tropical form (Pseudocaranx dentex) growing species, attaining a maximum age and the old name (P. georgianus) has been in excess of 25 years. In NSW coastal waters restored. Silver trevally occur in estuarine and trevally reach a maximum size of about coastal waters of southern Australian states 65 cm FL and weight of about 4 kg. Since the ranging from about Coffs Harbour in NSW 1980s, the average size of silver trevally in to about Perth in WA. Most of the Australian catches has declined considerably and in recent commercial catch is taken in NSW and eastern years fish greater than about 35 cm in length Victoria. Silver trevally is a schooling species, (or 0.75 kg in weight) have been very poorly inhabiting mainly sandy substrates and feeding represented in catches. Commercial catches are on benthic invertebrates, including worms and dominated by young fish, less than about five molluscs, and also on benthic and planktonic years of age. crustaceans. Commercial landings of silver trevally increased Silver trevally mature between 18 and 24 cm significantly to more than 1000 t per annum fork length (FL), at 2 - 4 years of age. Females during the early 1980s. Annual landings then have moderate fecundity (50,000–200,000 steadily declined to less than 500 t in the eggs) and spawn during an extended period late 1990s. Commercial landings have been from spring to autumn. Larvae occur in coastal around 200 to 300 t for the past decade. The waters throughout this period, and may enter bulk of the commercial catch of silver trevally estuaries before settling out as juveniles. is taken in ocean waters by otter trawling. Fish less than 10 cm in length were found in Smaller quantities are taken by fish trapping. STATUS OF FISHERIES RESOURCES IN NSW, 2008/09 SilvER TREvallY | P 291 WILD FISHERIES RESEARCH PROGRAM Commercial catches of silver trevally from Catch estuarine waters have declined significantly following the declaration of a Recreational Recreational Catch of Silver Trevally Fishing Haven in Botany Bay in 2002. In recent The annual recreational harvest of silver trevally years, buy-outs of trawling licences associated in NSW is likely to lie between 100 and 210 t. with the implementation of Marine Parks have This estimate is based upon the results of the resulted in a further decline in landings of offsite National Recreational and Indigenous silver trevally. Most trevally are sold fresh at the Fishing Survey (Henry and Lyle, 2003) and Sydney and Melbourne fish markets where the onsite surveys undertaken by I & I NSW. species receives moderate prices depending on the size grade and quality of handling after Historical Landings of Silver Trevally capture. Significant catches of silver trevally are taken by 1500 recreational fishers in both estuarine and ocean waters. In the mid 1990s the annual catch of silver trevally from ocean waters by recreational 1000 fishers was estimated to be between 150 and 210 t; however it is thought that recent catches have been lower. Landings (t) 500 Additional Notes • A minimum legal length (MLL) of 30 cm total 0 length was implemented in September 2007, 48/49 58/59 68/69 78/79 88/89 98/99 08/09 however this regulation does not apply to fish Financial Year Commercial landings (including available historical caught under Commonwealth jurisdiction. records) of silver trevally for NSW from 1944/45 to • The implementation of the zoning plan 2008/09 for all fishing methods. Note that the decline in reported catch during the late 1990s was due to changes for the Batemans Marine Park off the NSW in catch recording requirements for fishers with both south coast in 2007 resulted in the closure NSW and Commonwealth licences. to trawling of significant areas where silver trevally were previously targeted. A number Landings by Commercial Fishery of Silver Trevally of trawl licences were also bought out during the implementation of this Marine Park. Ocean Trap and Line (Primary Species) Fish Trawl (Primary Species) • NSW landings in 2007/08 were 133 t, and Estuary General size composition monitoring is continuing * Ocean Hauling (Target Species) at the Sydney Fish Market following the implementation of the MLL. 500 • There was a large reduction in the Commonwealth Total Allowable Catch (TAC) 400 for silver trevally from 270 t in 2006 to 146 t in 2007, but only 67 t was landed in 2007. For 300 2008 the TAC was increased again to 296 t Landings (t) and landings were 112 t. 200 • The Commonwealth status of ‘not overfished’ 100 was based on an analysis of catch rate data 0 - that the stock may be considered ‘growth 97/98 99/00 01/02 03/04 05/06 07/08 overfished’ is not considered relevant to the Financial Year assessment (Wilson et al. 2009). Reported landings of silver trevally by NSW commercial • There is a minimum legal length of fisheries from 1997/98. * Fisheries which contribute less 30 cm total length for silver trevally and a than 2.5% of the landings are excluded for clarity and privacy. recreational bag limit of 20 for all trevallies. P 292 | SilvER TREvallY STATUS OF FISHERIES RESOURCES IN NSW, 2008/09 Catch Per Unit Effort Information of Silver Trevally Length Frequency of Silver Trevally Harvested by Fish Trawling in NSW 1980/81−1998/99 n = 20 568 0.20 1.0 0.15 0.8 0.10 0.6 Proportion 0.05 0.4 Relative Catch Rate 0.00 0.2 10 20 30 40 50 60 0.0 98/99 00/01 02/03 04/05 06/07 08/09 2000/01−2006/07 Financial Year n = 12 254 0.20 Catch rates of silver trevally harvested using fish trawling for NSW. Two indicators are provided: (1) median catch 0.15 rate (lower solid line); and (2) 90th percentile of the catch rate (upper dashed line). Note that catch rates are not a 0.10 robust indicator of abundance in many cases. Caution Proportion should be applied when interpreting these results. 0.05 0.00 10 20 30 40 50 60 Growth Curve of Silver Trevally 2007/08−2008/09 n = 3573 0.20 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 0.15 50 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 0.10 ● ● ● ● ● ● Proportion ● ● 40 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 0.05 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● FL (cm) ● ● ● ● ● ● ● ● ● ● ● 30 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 0.00 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 10 20 30 40 50 60 ● ● ● ● ● ● ● ● ● ● ● ● ● 20 ● ● ● ● ● ● ● ● FL (cm) ● ● ● ● ● ● ● ● ● ● ● The proportion of larger (> 30 cm fork length (FL)) ● ● ● silver trevally landed by NSW commercial fishers has 10 declined between 1980 and 2000, and recent catches 0 5 10 15 20 have comprised mainly fish between 20 and 30 cm FL. In Ring Count (years) September 2007 a minimum legal length of 30 cm total Age-length data with fitted growth curve for silver length (equivalent to 25 cm FL) was introduced for silver trevally (Rowling & Raines, 2000). Lengths are presented trevally in NSW. as fork length (FL). SilvER TREvallY | P 293 WILD FISHERIES RESEARCH PROGRAM Further Reading Broadhurst, M.K., C.A. Gray, D.D. Reid, M.E.L. Wooden, Stewart, J. and J. M. Hughes (2008). Determining D.J. Young, J.A. Haddy and C. Damiano (2005). appropriate sizes at harvest for species shared Mortality of key fish species released by recreational by the commercial trap and recreational fisheries anglers in an Australian estuary, Journal of in New South Wales. FRDC Project No. 2004/035. Experimental Marine Biology and Ecology 321: 171- Fisheries Final Report Series No.97 Cronulla, NSW 179. Department of Primary Industries: 282pp. Henry, G.W. and J.M. Lyle (2003). The National Wilson, D., R. Curtotti, G. Begg and K. Phillips, Eds. Recreational and Indigenous Fishing Survey. Final (2009). Fishery Status Reports 2008: status of fish Report to the Fisheries Research & Development stocks and fisheries managed by the Australian Corporation and the Fisheries Action Program Government. Canberra, Bureau of Rural Sciences Project FRDC 1999/158. NSW Fisheries Final Report & Australian Bureau of Agricultural and Resource Series No. 48. 188. Cronulla, NSW Fisheries. Economics. Rowling, K.R. and L.P. Raines (2000). Description of the biology and an assessment of the fishery for silver Please visit the CSIRO website, trevally Pseudocaranx dentex off New South Wales. http://www.marine.csiro.au/caab/ and search for the Final Report to Fisheries Research and Development species code (CAAB) 37 337062, common name or Corporation. Project 97/125. NSW Fisheries Final Report Series No. 24. Cronulla, NSW Fisheries: 69pp. scientific name to find further information. Smith-Vaniz, W.F. and H.L. Jelks (2006). Australian trevallies of the genus Pseudocaranx (Teleostei: Carangidae), with description of a new species from Western Australia. Memoirs of Museum Victoria 63 (1): 97-106. Steffe, S., J. Murphy, D. Chapman, B.E. Tarlington, G.N.G. Gordon and A. Grinberg (1996). An assessment of the impact of offshore recreational fishing in New South Wales on the management of commercial fisheries. Project 94/053. Sydney, NSW Fisheries Research Institute: 139 pp. Stewart, J.
Load more

Recommended publications
  • New Zealand Fishes a Field Guide to Common Species Caught by Bottom, Midwater, and Surface Fishing Cover Photos: Top – Kingfish (Seriola Lalandi), Malcolm Francis
    New Zealand fishes A field guide to common species caught by bottom, midwater, and surface fishing Cover photos: Top – Kingfish (Seriola lalandi), Malcolm Francis. Top left – Snapper (Chrysophrys auratus), Malcolm Francis. Centre – Catch of hoki (Macruronus novaezelandiae), Neil Bagley (NIWA). Bottom left – Jack mackerel (Trachurus sp.), Malcolm Francis. Bottom – Orange roughy (Hoplostethus atlanticus), NIWA. New Zealand fishes A field guide to common species caught by bottom, midwater, and surface fishing New Zealand Aquatic Environment and Biodiversity Report No: 208 Prepared for Fisheries New Zealand by P. J. McMillan M. P. Francis G. D. James L. J. Paul P. Marriott E. J. Mackay B. A. Wood D. W. Stevens L. H. Griggs S. J. Baird C. D. Roberts‡ A. L. Stewart‡ C. D. Struthers‡ J. E. Robbins NIWA, Private Bag 14901, Wellington 6241 ‡ Museum of New Zealand Te Papa Tongarewa, PO Box 467, Wellington, 6011Wellington ISSN 1176-9440 (print) ISSN 1179-6480 (online) ISBN 978-1-98-859425-5 (print) ISBN 978-1-98-859426-2 (online) 2019 Disclaimer While every effort was made to ensure the information in this publication is accurate, Fisheries New Zealand does not accept any responsibility or liability for error of fact, omission, interpretation or opinion that may be present, nor for the consequences of any decisions based on this information. Requests for further copies should be directed to: Publications Logistics Officer Ministry for Primary Industries PO Box 2526 WELLINGTON 6140 Email: [email protected] Telephone: 0800 00 83 33 Facsimile: 04-894 0300 This publication is also available on the Ministry for Primary Industries website at http://www.mpi.govt.nz/news-and-resources/publications/ A higher resolution (larger) PDF of this guide is also available by application to: [email protected] Citation: McMillan, P.J.; Francis, M.P.; James, G.D.; Paul, L.J.; Marriott, P.; Mackay, E.; Wood, B.A.; Stevens, D.W.; Griggs, L.H.; Baird, S.J.; Roberts, C.D.; Stewart, A.L.; Struthers, C.D.; Robbins, J.E.
    [Show full text]
  • Biology, Stock Status and Management Summaries for Selected Fish Species in South-Western Australia
    Fisheries Research Report No. 242, 2013 Biology, stock status and management summaries for selected fish species in south-western Australia Claire B. Smallwood, S. Alex Hesp and Lynnath E. Beckley Fisheries Research Division Western Australian Fisheries and Marine Research Laboratories PO Box 20 NORTH BEACH, Western Australia 6920 Correct citation: Smallwood, C. B.; Hesp, S. A.; and Beckley, L. E. 2013. Biology, stock status and management summaries for selected fish species in south-western Australia. Fisheries Research Report No. 242. Department of Fisheries, Western Australia. 180pp. Disclaimer The views and opinions expressed in this publication are those of the authors and do not necessarily reflect those of the Department of Fisheries Western Australia. While reasonable efforts have been made to ensure that the contents of this publication are factually correct, the Department of Fisheries Western Australia does not accept responsibility for the accuracy or completeness of the contents, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the contents of this publication. Fish illustrations Illustrations © R. Swainston / www.anima.net.au We dedicate this guide to the memory of our friend and colleague, Ben Chuwen Department of Fisheries 3rd floor SGIO Atrium 168 – 170 St Georges Terrace PERTH WA 6000 Telephone: (08) 9482 7333 Facsimile: (08) 9482 7389 Website: www.fish.wa.gov.au ABN: 55 689 794 771 Published by Department of Fisheries, Perth, Western Australia. Fisheries Research Report No. 242, March 2013. ISSN: 1035 - 4549 ISBN: 978-1-921845-56-7 ii Fisheries Research Report No.242, 2013 Contents ACKNOWLEDGEMENTS ...............................................................................................
    [Show full text]
  • Landcorp Denmark East Development Precinct Flora and Fauna Survey
    LandCorp Denmark East Development Precinct Flora and Fauna Survey October 2016 Executive summary Introduction Through the Royalties for Regions “Growing our South” initiative, the Shire of Denmark has received funding to provide a second crossing of the Denmark River, to upgrade approximately 6.5 km of local roads and to support the delivery of an industrial estate adjacent to McIntosh Road. GHD Pty Ltd (GHD) was commissioned by LandCorp to undertake a biological assessment of the project survey area. The purpose of the assessment was to identify and describe flora, vegetation and fauna within the survey area. The outcomes of the assessment will be used in the environmental assessment and approvals process and will identify the possible need for, and scope of, further field investigations will inform environmental impact assessment of the road upgrades. The survey area is approximately 68.5 ha in area and includes a broad area of land between Scotsdale Road and the Denmark River and the road reserve and adjacent land along East River Road and McIntosh Road between the Denmark Mt Barker Road and South Western Highway. A 200 m section north and south along the Denmark Mt Barker Road from East River Road was also surveyed. The biological assessment involved a desktop review and three separate field surveys, including a winter flora and fauna survey, spring flora and fauna survey and spring nocturnal fauna survey. Fauna surveys also included the use of movement sensitive cameras in key locations. Key biological aspects The key biological aspects and constraints identified for the survey area are summarised in the following table.
    [Show full text]
  • Preliminary Consideration of the Biology of Several of South Australia’S Marine Fish Species That Have Conservation Or Management Interest
    Preliminary consideration of the biology of several of South Australia’s marine fish species that have conservation or management interest Report to the Department for Environment and Heritage R.J. Saunders, S.R. Bryars1 and A.J. Fowler 1Nature Conservation, Conservation Policy and Programs, Department for Environment and Heritage SARDI Publication No. F2009/000693-1 SARDI Research Report Series No. 426 SARDI Aquatic Sciences PO Box 120 Henley Beach SA 5022 February 2010 Preliminary consideration of the biology of several of South Australia’s marine fish species that have conservation or management interest Report to the Department for Environment and Heritage R.J. Saunders, S.R. Bryars1 and A.J. Fowler 1Nature Conservation, Conservation Policy and Programs, Department for Environment and Heritage SARDI Publication No. F2009/000693-1 SARDI Research Report Series No. 426 February 2010 ii This publication may be cited as: Saunders, R.J., Bryars, S.R. and Fowler, A.J (2010). Preliminary consideration of the biology of several of South Australia’s marine fish species that have conservation or management interest. Report to the Department for Environment and Heritage. South Australian Research and Development Institute (Aquatic Sciences), Adelaide. SARDI Publication No. F2009/000693-1. SARDI Research Report Series No. 426. 41p. South Australian Research and Development Institute SARDI Aquatic Sciences 2 Hamra Avenue 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, Aquatic Sciences.
    [Show full text]
  • Mcmillan NZ Fishes Vol 2
    New Zealand Fishes Volume 2 A field guide to less common species caught by bottom and midwater fishing New Zealand Aquatic Environment and Biodiversity Report No. 78 ISSN 1176-9440 2011 Cover photos: Top – Naked snout rattail (Haplomacrourus nudirostris), Peter Marriott (NIWA) Centre – Red pigfish (Bodianus unimaculatus), Malcolm Francis. Bottom – Pink maomao (Caprodon longimanus), Malcolm Francis. New Zealand fishes. Volume 2: A field guide to less common species caught by bottom and midwater fishing P. J McMillan M. P. Francis L. J. Paul P. J. Marriott E. Mackay S.-J. Baird L. H. Griggs H. Sui F. Wei NIWA Private Bag 14901 Wellington 6241 New Zealand Aquatic Environment and Biodiversity Report No. 78 2011 Published by Ministry of Fisheries Wellington 2011 ISSN 1176-9440 © Ministry of Fisheries 2011 McMillan, P.J.; Francis, M.P.; Paul, L.J.; Marriott, P.J; Mackay, E.; Baird, S.-J.; Griggs, L.H.; Sui, H.; Wei, F. (2011). New Zealand fishes. Volume 2: A field guide to less common species caught by bottom and midwater fishing New Zealand Aquatic Environment and Biodiversity Report No.78. This series continues the Marine Biodiversity Biosecurity Report series which ended with MBBR No. 7 in February 2005. CONTENTS PAGE Purpose of the guide 4 Organisation of the guide 4 Methods used for the family and species guides 5 Data storage and retrieval 7 Acknowledgments 7 Section 1: External features of fishes and glossary 9 Section 2: Guide to families 15 Section 3: Guide to species 31 Section 4: References 155 Index 1 – Alphabetical list of family
    [Show full text]
  • Indirect Effects on Seabirds in Northern North Island POP2017-06 (Milestone 7 Report)
    Indirect effects on seabirds in northern North Island POP2017-06 (Milestone 7 Report) Comparison of availability of food species in fish shoals and how those items are represented in different seabird diets in the region 1 20 June 2019 Prepared by Chris Gaskin, Project Coordinator, Northern New Zealand Seabird Trust (for NNZST), and Nigel Adams (Unitec Institute of Technology), with an appended report by Lily Kozmian- Ledward (Sea Lily Ltd), Associate Professor Andrew Jeffs (University of Auckland) and Chris Gaskin - Analysis of zooplankton samples 2018-2019. Funding support from the and the Birds NZ Research Fund Cover photo: (top) Fluttering shearwaters, fairy prions and fish school activity. Photo: Edin Whitehead; (bottom) Kahawai and trevally with euphausiids. Screenshot from video: NNZST Figure 1 (above). Australasian gannet with saury. Photo: Edin Whitehead 2 Introduction This project (POP2017-06) builds on the findings of INT2016-04 (Gaskin 2017). A range of commercial fisheries target aggregations of surface shoaling fish. Purse seining is commonly used to capture these fish schools. The dense fish schools create a phenomenon known as fish workups. These fish drive up prey items to the sea surface and observations suggest that this forms an important food source for a range of seabird species. There is currently poor knowledge of both the diet of surface-foraging seabirds and what prey items are being made available to seabirds from fish workups. This has limited our understanding of the mechanisms through which changes in the distribution and/or abundance of fish workups may be driving seabird population changes (population status and annual breeding success).
    [Show full text]
  • UNCOMMON, CRYPTIC and SITE-ASSOCIATED REEF FISHES: RESULTS of SURVEYS ALONG FLEURIEU PENINSULA & in ENCOUNTER BAY 2009
    UNCOMMON, CRYPTIC and SITE-ASSOCIATED REEF FISHES: RESULTS OF SURVEYS ALONG FLEURIEU PENINSULA & IN ENCOUNTER BAY 2009 J. Baker1, H. Crawford2, D. Muirhead3, S. Shepherd4, J. Brook5, A. Brown6, and C. Hall3 1 J.L. Baker, Marine Ecologist, Somerton Park, SA, 5044. Email: [email protected] 2 H. Crawford, Visual Artist [email protected] 3 Marine Life Society of South Australia (MLSSA) 4Senior Research Fellow, SARDI Aquatic Sciences PO Box 120 Henley Beach SA 5022 5 PO Box 111, Normanville, SA. 5204 6 Dept for Environment and Heritage, GPO Box 1047, Adelaide SA 5011 Photo: J. Baker Report for: Adelaide and Mt Lofty Ranges Natural Resources Management Board August 2009 UNCOMMON, CRYPTIC and SITE-ASSOCIATED REEF FISHES: RESULTS OF SURVEYS ALONG FLEURIEU PENINSULA & IN ENCOUNTER BAY 2009 SUMMARY Reef locations along the Fleurieu Peninsula and Encounter Bay were surveyed by diving and snorkelling, from December 2008 to June 2009. The surveys are part of a series we began in 2007, through which we have aimed to (i) develop a suitable non-destructive technique to search for various uncommon reef fishes (mostly benthic, and many cryptic) throughout South Australia; and (ii) record and photograph such fishes, in order to learn more about their distribution, habitats, and habits. Our target list comprises more than 50 species from 14 families, for which little information is available on full distribution within South Australia, and habitat. Examples of our records during the 2009 survey period included (i) one uncommonly recorded endemic
    [Show full text]
  • State of Fisheries Report
    SOUTH COAST BIOREGION South Coast Nearshore and Estuarine Finfish Resources Status Report Main Features Status Current Landings (2010) Stock levels: Commercial total 689 t (finfish only) Australian herring Uncertain South Coast Salmon Fishery 289 t (salmon only) Australian salmon Acceptable South Coast herring trap net fishery 147 t (herring only) Sea mullet Acceptable South Coast Estuarine Fishery 223 t (finfish only) Black bream (Stokes Inlet) Acceptable Other commercial 30 t (finfish only) Black bream (Beaufort Inlet) Acceptable Black bream (Wilson Inlet) Acceptable Recreational not available for current year. Black bream (Oyster Harbour) Acceptable Most recent survey was in 2000/01. Black bream (Walpole-Nornalup Inlet) Not assessed 2000/01 finfish catch 368 t (key species only) Cobbler (Wilson Inlet) Acceptable Cobbler (Oyster Harbour) Acceptable Fishing Level Acceptable Fishery Description Commercial - Nearshore Coast Estuarine Managed Fishery. This is a multi-species Beach-based commercial fishers in nearshore waters of the fishery targeting many estuarine finfish species, with the South Coast Bioregion catch various finfish species, mainly main fishing methods being gill net and haul net. The main using trap nets (herring only), beach seines, haul nets and gill target species are cobbler (Cnidoglanis macrocephalus), nets. The main target species are Australian salmon (Arripis black bream (Acanthopagrus butcheri), sea mullet and truttaceus) and Australian herring (Arripis georgianus), with Australian herring. small quantities of southern sea garfish (Hyporhamphus Recreational melanochir) and sea mullet (Mugil cephalus) also taken. Most finfish caught recreationally in South Coast Bioregion Australian salmon form large migratory schools, particularly estuaries and nearshore waters are taken by line fishing. during the autumn spawning season, that move along the Shore and boat-based fishing are both popular.
    [Show full text]
  • Silver Trevally (2016)
    STATUS OF AUSTRALIAN FISH STOCKS REPORT Silver Trevally (2016) Silver Trevally (2016) Pseudocaranx georgianus, Pseudocaranx sp. "dentex" & Pseudocaranx wrighti Rowan Chick: Department of Primary Industries, New South Wales, Anthony Roelofs: Department of Agriculture and Fisheries, Queensland, Corey Green: Department of Economic Development, Jobs, Transport and Resources, Victoria, David Fairclough: Department of Fisheries, Western Australia, John Stewart: Department of Primary Industries, New South Wales, Lee Georgeson: Australian Bureau of Agricultural and Resource Economics and Sciences, Timothy Emery: Institute for Marine and Antarctic Studies, University of Tasmania STOCK STATUS OVERVIEW Jurisdiction Stock Fisheries Stock status Indicators Commonwealth Commonwealth SESSF (CTS) Sustainable Catch, CPUE Western Australia Western CSFNMF, WL Sustainable Catch Australia (WC), GDSMF, JASDGDLMF, SCEMF, WCDSIMF, WCEMF, WL (SC) Queensland Queensland CRFFF, Undefined Catch ECIFFF, RRFFF New South Wales New South EGF, OTF, Transitional- Catch, CPUE, size/age Wales OTLF depleting composition Victoria Victoria CIF, GLF, OF, Undefined Catch, CPUE PPBF Tasmania Tasmania SF Undefined Catch, Effort SESSF (CTS) Southern and Eastern Scalefish and Shark Fishery (Commonwealth Trawl Sector) (CTH), EGF Estuary General Fishery (NSW), OTF Ocean Trawl Fishery (NSW), OTLF Ocean Trap and Line (NSW), CRFFF Coral Reef Fin Fish Fishery (QLD), ECIFFF East Coast Inshore Fin Fish Fishery (QLD), RRFFF Rocky Reef Fin Fish Fishery (QLD), SF Scalefish Fishery (TAS), CIF
    [Show full text]
  • The Etyfish Project © Christopher Scharpf and Kenneth J
    CARANGIFORMES (part 1) · 1 The ETYFish Project © Christopher Scharpf and Kenneth J. Lazara COMMENTS: v. 1.0 - 18 July 2020 Series CARANGARIA Order CARANGIFORMES (part 1 of 4) Suborder CENTROPOMOIDEI Family LATIDAE Giant Perches 3 genera · 14 species · Taxonomic note: nested within Centropomidae by some workers. Hypopterus Gill 1861 hypo-, ventral or below; pterus, fin, allusion not explained, presumably referring to anal fin, described as longer than dorsal fin Hypopterus macropterus (Günther 1859) macro-, long or large; ptera, fin, allusion not explained, presumably referring “very long” third spine of dorsal fin and/ or “long” anal fin Lates Cuvier 1828 from latès or latos, local name for L. niloticus since the “time of the ancients” (translation) Lates angustifrons Boulenger 1906 angustus, narrow; frons, front, face or brow, referring to “much narrower interorbital region” compared to the closely related L. microlepis Lates calcarifer (Bloch 1790) calcar, spur; fero, to bear, referring to four spines on operculum, “which resemble a spur” (translation) Lates japonicus Katayama & Taki 1984 Japanese, known only from the western North Pacific of Japan Lates lakdiva Pethiyagoda & Gill 2012 Lakdiva, Sinhalese name for island of Sri Lanka, only known area of occurrence Lates longispinis Worthington 1932 longus, long; spinis, spine, proposed as a subspecies of L. niloticus with a longer third spine of dorsal fin Lates macrophthalmus Worthington 1929 macro-, large; ophthalmus, referring to larger eye compared to L. niloticus Lates mariae Steindachner 1909 in honor of Maria Horn who, with her husband Adolf, explored German East-Africa (present-day Burundi and Tanzania), collecting specimens for the Vienna Museum, including type of this one Lates microlepis Boulenger 1898 micro-, small; lepis, scale, referring to smaller scales compared to L.
    [Show full text]
  • The Fish Communities and Main Fish Populations of the Jurien Bay Marine Park
    The fish communities and main fish populations of the Jurien Bay Marine Park Fairclough, D.V., Potter, I.C., Lek, E., Bivoltsis, A.K. and Babcock, R.C. Strategic Research Fund for the Marine Environment Collaborative Research Project Final Report May 2011 2 The fish communities and main fish populations of the Jurien Bay Marine Park Fairclough, D.V. Potter, I.C. Lek, E. Bivoltsis, A.K. Babcock, R.C. May 2011 Centre for Fish and Fisheries Research Murdoch University, South Street, Murdoch Western Australia 6150 ISBN: 978-0-86905-999-9 This work is copyright. Except as permitted under the Copyright Act 1968 (Cth), no part of this publication may be reproduced by any process, electronic or otherwise, without the specific written permission of the copyright owners. Neither may information be stored electronically in any form whatsoever without such permission. 3 4 Table of Contents 1.0 Executive Summary...........................................................................................................v 2.0 Acknowledgements ..........................................................................................................vii 3.0 General Introduction.........................................................................................................1 3.1 Marine protected areas.....................................................................................................1 3.1.1 Fisheries management goals .....................................................................................1 3.1.2 Indirect effects of MPAs...........................................................................................2
    [Show full text]
  • Functional Biodiversity of New Zealand's Marine Fishes Versus Depth and Latitude
    Copyright is owned by the Author of the thesis. Permission is given for a copy to be downloaded by an individual for the purpose of research and private study only. The thesis may not be reproduced elsewhere without the permission of the Author. Functional biodiversity of New Zealand’s marine fishes versus depth and latitude A thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Statistics at Massey University, Auckland, New Zealand Elisabeth Miro Valerie Myers June 2020 i Thesis Abstract Understanding patterns and processes governing biodiversity along broad-scale environmental gradients requires an assessment of not only taxonomic richness, but also morphological and functional traits of organisms. The deep sea is the largest habitat on earth and provides many important ecosystem services. Decreases in light, temperature, and trophic resources, along with increases in pressure that occur with greater depth, renders the deep sea one of the most constraining environments for supporting life. However, little is known about how biodiversity, and especially functional biodiversity, changes along the depth gradient. This thesis aimed to fill this gap by using a combination of traits associated with food acquisition and locomotion to quantify and characterise patterns of functional diversity across large-scale depth and latitude gradients and to investigate potential mechanisms driving biodiversity. First, to identify the major selective forces acting on morphology, I documented patterns of variation in the traits of fishes at broad spatial scales. I found that with increasing depth, fishes, on average, became larger and more elongate, and had a larger oral gape and eye size.
    [Show full text]