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Bluethroat Wrasse (2018)

Notolabrus tetricus

  • Bradley Moore (Institute for Marine and Antarctic Studies, University of Tasmania)
  • Anthony Fowler (South Australian Research and Development Institute)
  • Jeremy Lyle (Institute for Marine and Antarctic Studies, University of Tasmania)
  • Julian Hughes (Department of Primary Industries, New South Wales)
  • Paul Hamer (Victorian Fisheries Authority)

You are currently viewing a report filtered by jurisdiction. View the full report.

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Summary

Found on rocky reefs around south-eastern Australia, Bluethroat Wrasse stocks are sustainable in VIC, TAS and SA. In NSW the stock is negligible.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
South Australia South Australia NZRLF, SZRLF, MSF Sustainable Catch, effort, catch rates
MSF
Marine Scalefish Fishery (SA)
NZRLF
Northern Zone Rock Lobster Fishery (SA)
SZRLF
Southern Zone Rock Lobster Fishery (SA)
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Stock Structure

Bluethroat Wrasse are found on rocky reefs around south eastern Australia, including southern New South Wales, through Victorian and Tasmanian waters, to South Australia [Edgar 1997]. There is currently no information available regarding the biological stock structure of Bluethroat Wrasse in Australian waters. The species has a planktonic larval duration ranging from 44 to 66 days [Welsford 2003]. Once settled, Bluethroat Wrasse show a high degree of site fidelity [Edgar et al. 2004], suggesting that the exploited populations in each jurisdiction potentially represent different stocks.

Here, assessment of stock status is presented at the jurisdictional level—New South Wales, Victoria, Tasmania and South Australia.

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Stock Status

South Australia

Bluethroat Wrasse is considered a tertiary species of the South Australia's commercial multispecies, multi-gear and multi-sectoral Marine Scalefish Fishery. The most recent assessment for Bluethroat Wrasse was completed in 2018 [Steer et al. 2018] that considered data to December 2017. Bluethroat Wrasse are taken by commercial and recreational fishers. For the commercial sector, there is a small targeted fishery for which the captured fish are sold either as fresh, ice-slurried product or for the live fish market [Steer et al. 2018]. They are taken as by-product when other more valuable species are targeted, which is also the case for the recreational sector. Numerous species of wrasse are taken by the commercial sector and are reported as Bluethroat Wrasse. As such, it is not possible to differentiate the fishery statistics amongst species. Nevertheless, it is likely since the Bluethroat Wrasse is the largest and most abundant species that has historically dominated the catches.

The primary measures of biomass and fishing mortality are total catch, total line fishing effort and total line catch rates [Steer et al. 2018]. Total commercial catch of wrasse was relatively consistent at around 20 t per year between 1996 and 2011. Since then, it has declined to 13 t in 2017, associated with declining effort. Since 2009, annual catch rates have been relatively stable at a medium level compared with historic levels. The above evidence indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired. Furthermore, the above evidence indicates that the current level of fishing mortality is unlikely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, Bluethroat Wrasse in South Australia is classified as a sustainable stock.

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Biology

Bluethroat Wrasse biology [Barrett 1995, May and Maxwell 1986, Smith et al., 2003]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Bluethroat Wrasse 23 years, 500 mm TL  8 years, 250 mm TL
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Distributions

Distribution of reported commercial catch of Bluethroat Wrasse

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Tables

Fishing methods
South Australia
Commercial
Hook and Line
Demersal Longline
Indigenous
Handline
Recreational
Handline
Management methods
Method South Australia
Commercial
Limited entry
Size limit
Indigenous
Bag limits
Size limit
Recreational
Bag limits
Size limit
Active vessels
South Australia
38 in MSF, 4 in NZRLF, 4 in SZRLF
MSF
Marine Scalefish Fishery (SA)
NZRLF
Northern Zone Rock Lobster Fishery (SA)
SZRLF
Southern Zone Rock Lobster Fishery (SA)
Catch
South Australia
Commercial 13.42t in MSF, NZRLF, SZRLF
Indigenous Unknown
Recreational Unknown
MSF
Marine Scalefish Fishery (SA)
NZRLF
Northern Zone Rock Lobster Fishery (SA)
SZRLF
Southern Zone Rock Lobster Fishery (SA)

Victoria – Indigenous (Management methods) In Victoria, regulations for managing recreational fishing may not apply to fishing activities by Indigenous people. Victorian traditional owners may have rights under the Commonwealth's Native Title Act 1993 to hunt, fish, gather and conduct other cultural activities for their personal, domestic or non-commercial communal needs without the need to obtain a licence. Traditional Owners that have agreements under the Traditional Owner Settlement Act 2010 (Vic) may also be authorised to fish without the requirement to hold a recreational fishing licence. Outside of these arrangements, Indigenous Victorians can apply for permits under the Fisheries Act 1995 (Vic) that authorise fishing for specific Indigenous cultural ceremonies or events (for example, different catch and size limits or equipment). There were no Indigenous permits granted in 2017 and hence no Indigenous catch recorded.

Tasmania – Commercial (catch) Catches reported for the Tasmanian Scalefish Fishery are for the period 1 July to 30 June the following year. The most recent assessment available is for 2016–17.

Tasmania – Commercial (catch) A trip limit of 30 kg for landed dead Wrasse is in place if not the holder of a Wrasse licence.

Tasmania – Recreational (management methods) In Tasmania, a recreational licence is required for fishers using dropline or longline gear, along with nets, such as gillnet or beach seine. A minimum size limit of 300 mm is in place for all Wrasse species in Tasmanian waters. A bag limit of five fish and a possession limit of ten fish (all Wrasse species) is in place for recreational fishers.

Tasmania – Indigenous (management methods) In Tasmania, Indigenous persons engaged in aboriginal fishing activities in marine waters are exempt from holding recreational fishing licences, but must comply with all other fisheries rules as if they were licensed. Additionally, recreational bag and possession limits also apply. If using pots, rings, set lines or gillnets, Indigenous persons must obtain a unique identifying code (UIC). The policy document Recognition of Aboriginal Fishing Activities for issuing a UIC to a person for Aboriginal Fishing activity explains the steps to take in making an application for a UIC.

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Catch Chart

Commercial catch of Bluethroat Wrasse - note confidential catch not shown

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References

  1. Barrett, NS 1995, Aspects of the biology and ecology of six temperate reef fishes (families: Labridae and Monacanthidae). PhD thesis, University of Tasmania.
  2. Edgar, G 1997, Australian Marine Life: the plants and animals of temperate waters. Reed Books, Melbourne.
  3. Edgar, GJ, Barrett, NS and Morton, AJ 2004 Patterns of fish movement on eastern Tasmanian rocky reefs, Environmental Biology of Fishes, 70: 273–284.
  4. Lyle, JM, Stark, KE and Tracey, SR 2014, 2012–13 survey of recreational fishing in Tasmania. Institute for Marine and Antarctic Studies, Hobart.
  5. May, JL and Maxwell, JGH 1986, Trawl fish from temperate waters of Australia. CSIRO Division of Fisheries Research, Tasmania. 492 p.
  6. Moore, B, Lyle J and Hartmann K 2018, Tasmanian Scalefish Fishery Assessment 2016/17. Institute for Marine and Antarctic Studies, University of Tasmania.
  7. Smith, DC, Montgomery, I, Sivzkumaran, KP, Krusic Golub K, Smith K and Hodge R 2003, The fisheries biology of Bluethroat Wrasse (Notolabrus tetricus) in Victorian Waters. Fisheries Research and Development Corporation project 97/128, Fisheries Research and Development Corporation and Department of Primary Industries, Victoria.
  8. Steer, MA, Fowler, AJ, McGarvey, R, Feenstra, J, Westlake, EL, Matthews, D, Drew ,M, Rogers PJ and Earl J 2018, Assessment of the South Australian Marine Scalefish Fishery in 2016. Report to PIRSA Fisheries and Aquaculture. South Australian Research and Development Institute (Aquatic Sciences), Adelaide. SARDI Publication No. F2017/000427-1. SARDI Research Report Series No. 974. 250 pp.
  9. VFA 2017, Harvest strategy for the Victorian Wrasse (Ocean) Fishery.
  10. VFA 2017, Review of key Victorian fish stocks—2017 Victorian Fisheries Authority Science Report Series No. 1.
  11. Welsford, DC 2003, Early life-history settlement dynamics and growth of the temperate wrasse, Notolabrus furicola (Richardson 1840), on the east coast of Tasmania. PhD thesis, University of Tasmania, Hobart.
  12. West, LD, Stark, KE, Murphy, JJ, Lyle, JM and Ochwada-Doyle, FA 2015, Survey of recreational fishing in New South Wales and the ACT, 2013–14, Fisheries final report series 149, NSW Department of Primary Industries, Wollongong.