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Blue-eye Trevalla (2018)

Hyperoglyphe antarctica

  • Lee Georgeson (Australian Bureau of Agricultural and Resource Economics and Sciences)
  • Luke Albury (Department of Agriculture and Fisheries, Queensland)
  • Corey Wakefield (Department of Primary Industries and Regional Development, Western Australia)
  • Jeremy Lyle (Institute for Marine and Antarctic Studies, University of Tasmania)
  • Rowan Chick (Department of Primary Industries, New South Wales)
  • Fabian Trinnie (Department of Primary Industries and Regional Development, Western Australia)

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

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Summary

Blue-eye Trevalla is a sustainable species around the Australian coastline. It is mainly targeted by commercial fishing, but catch is highly variable.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Fisheries Stock status Indicators
Western Australia Western Australia WCDSIMF, WL (SC) Sustainable Catch, fishing mortality
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)
WL (SC)
Open Access in the South Coast (WA)
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Stock Structure

Recently, three lines of evidence, based on phenotypic variation in age and growth, otolith chemistry and potential larval dispersal, suggest spatial patterns that may delineate natural subpopulations of Blue-eye Trevalla [Williams et al. 2017]. This research identified four geographically distinct subpopulations around the Australian coast: West, South, East and Seamounts-Lord Howe.

The results of the study by Williams et al. [2017] have not been implemented into management. Given that a single biological stock of Blue-eye Trevalla has been assumed for eastern Australian waters for the purposes of stock assessment and management, assessment of stock status is presented here at the biological stock level—Eastern Australia and Western Australia.

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Stock Status

Western Australia

Stock assessment for Blue-eye Trevalla in the Western Australia biological stock is based on assessment of fishing mortality derived from catch curve analysis of representative samples of the age structure in the state-managed demersal fisheries (West Coast Demersal Scalefish Interim Managed Fishery, Joint Authority Southern Demersal Gillnet and Demersal Longline Managed Fishery and Wet Line Fishery [South Coast, Western Australia]). These fishing mortality based assessments use reference levels (target, threshold and limit) based on ratios of natural mortality (M) for each species (Ftarget = 2/3M, Fthreshold = M and Flimit = 3/2M [DPIRD 2017]). Recent fishing mortality based assessments indicated that the estimated fishing mortality rate on Blue-eye Trevalla in this biological stock was stable at close to the threshold level in 2011 and 2014. This indicates that current fishing pressure is not having an unacceptable impact on the age structure of the population. The above evidence indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired.

Blue-eye Trevalla catches from the state-managed demersal fisheries (Western Australia biological stock) from 1999–2017 ranged between 1.3 and 19.0 t, with catches over the last 10 year period from 2008–2017, averaging 5.0 t per year. 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, the Western Australia biological stock is classified as a sustainable stock.

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Biology

Blue-eye Trevalla biology [Baelde 1995, Stobutzki et al. 2009]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Blue-eye Trevalla Eastern Australia: 42 years, 1 400 mm TL Western Australia: 65 years, 1 300 mm TL Males 620 mm TL, females 720 mm TL Males 8–9 years, females 11–12 years
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Distributions

Distribution of reported commercial catch of Blue-eye Trevalla

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Tables

Fishing methods
Western Australia
Commercial
Hand Line, Hand Reel or Powered Reels
Dropline
Unspecified
Charter
Handline
Recreational
Handline
Management methods
Method Western Australia
Charter
Bag limits
Limited entry
Passenger restrictions
Spatial closures
Spatial zoning
Commercial
Gear restrictions
Limited entry
Spatial closures
Spatial zoning
Total allowable catch
Vessel restrictions
Indigenous
Laws of general application
Recreational
Bag limits
Licence (Recreational Fishing from Boat License)
Spatial closures
Active vessels
Western Australia
<3 in Charter, 3 in WCDSIMF, 16 in WL (SC)
Charter
Tour Operator (WA)
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)
WL (SC)
Open Access in the South Coast (WA)
Catch
Western Australia
Commercial 10.05t in WCDSIMF, WL (SC)
Charter 2.03 t
Indigenous Unknown
Recreational 1.38 t ± 0.93 t se
WCDSIMF
West Coast Demersal Scalefish (Interim) Managed Fishery (WA)
WL (SC)
Open Access in the South Coast (WA)

Commonwealth – Recreational The Australian Government does not manage recreational fishing in Commonwealth waters. Recreational fishing in Commonwealth waters is managed by the state or territory immediately adjacent to those waters, under its management regulations.

Commonwealth – Indigenous The Australian Government does not manage non-commercial Indigenous fishing in Commonwealth waters, with the exception of the Torres Strait. In general, non-commercial Indigenous fishing in Commonwealth waters is managed by the state or territory immediately adjacent to those waters.

Western Australia – Recreational (Catch) Boat-based recreational catch is from 1 September 2015–31 August 2016. These data are derived from those reported in Ryan et al. 2017.

Western Australia – Recreational (Management Methods) A Recreational Fishing from Boat License is required for the use of a powered boat to fish or to transport catch or fishing gear to or from a land-based fishing location.

Western Australia – Indigenous Subject to the defence that applies under Section 211 of the Native Title Act 1993 (Cth), and the exemption from a requirement to hold a recreational fishing licence, the non-commercial take by indigenous fishers is covered by the same arrangements as that for recreational fishing.

New South Wales – Commercial Dropline cannot be automated in New South Wales.

New South Wales – Indigenous (Management Methods) (a) The Aboriginal cultural fishing authority is the authority that Indigenous persons can apply to take catches outside the recreational limits under the Fisheries Management Act 1994 (NSW), Section 37 (1d)(3)(9), Aboriginal cultural fishing authority; and (b) In cases where the Native Title Act 1993 (Cth) applies fishing activity can be undertaken by the person holding native title in line with S.211 of that Act, which provides for fishing activities for the purpose of satisfying their personal, domestic or non-commercial communal needs. In managing the resource where native title has been formally recognised, the native title holders are engaged with to ensure their native title rights are respected and inform management of the State's fisheries resources.

Queensland – Indigenous (Management Methods) In Queensland, under the Fisheries Act 1994 (Qld), Indigenous fishers are able to use prescribed traditional and non-commercial fishing apparatus in waters open to fishing. Size and possession limits, and seasonal closures do not apply to Indigenous fishers. Further exemptions to fishery regulations may be applied for through permits.

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.

Tasmania – Charter (management Methods) In New South Wales there are four charter boat endorsement categories (Estuarine Fishing; Nearshore Bottom Fishing and Sportfishing; Gamefishing; and Deep Sea Bottom Fishing). The different categories have limitations on the species of fish they can access.

Tasmania – Indigenous (Management Methods) In Tasmania, aborigines 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, Aborigines 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 Blue-eye Trevalla - note confidential catch not shown.

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References

  1. AFMA 2014, 'SESSF Fishery Slope Resource Assessment Group (SlopeRAG), minutes, 30 October 2014, Hobart', SlopeRAG, AFMA, Canberra.
  2. Baelde, P 1995, Blue-eye trevalla 1994, compiled by Pascale Baelde for the South East Fishery Assessment Group, Australian Fisheries Management Authority, Canberra.
  3. DPIRD 2017, North Coast demersal scalefish resource harvest strategy 2017 – 2021. Version 1.0. Fisheries Management Paper No. 285. Department of Primary Industries and Regional Development, Government of Western Australia, Perth, Australia. 35p.
  4. Haddon 2017, Tier 4 Assessment for Blue-eye trevalla (data to 2016), CSIRO.
  5. Haddon, M 2016, Tier 4 analyses for selected species in the SESSF (data from 1986–2015), draft version, CSIRO Oceans and Atmosphere, Hobart.
  6. Henry, GW and Lyle, JM 2003, The national recreational and Indigenous fishing survey. Fisheries Research and Development Corporation, Canberra.
  7. Kailola, PJ, Williams, MJ, Stewart, PC, Reichelt, RE, McNee, A and Grieve, C, 1993, Australian fisheries resources. Bureau of resource sciences, department of primary industries and energy. Fisheries Research and Development Corporation, Canberra, Australia.
  8. Queensland Department of Agriculture and Fisheries 2018, Queensland Stock Status Assessment Workshop Proceedings 2018. Species Summaries. 19–20 June 2018, Brisbane.
  9. Ryan, KL, Hall, NG, Lai, EK, Smallwood, CB, Taylor, SM, Wise, BS 2017, Statewide survey of boat-based recreational fishing in Western Australia 2015/16. Fisheries research Report No. 287. Department of Primary Industries and Regional Development, Government of Western Australia, Perth. 
  10. Stobutzki, I, Patterson, H, Ward, P, Sampaklis, A, Sahlqvist, P, Moore, A and Viera, S 2009, Commonwealth Trawl and Scalefish Hook Sectors, in Wilson, D, Curtotti, R and Begg, G (eds) 2009, Fishery status reports 2009: status of fish stocks and fisheries managed by the Australian Government, Australian Bureau of Agricultural and Resource Economics – Bureau of Rural Sciences, Canberra.
  11. Webley, J, McInnes, K, Teixeira, D, Lawson, A and Quinn, R 2015, Statewide Recreational Fishing Survey 2013-14, Queensland Department of Agriculture and Fisheries, Brisbane.
  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 No. 149. NSW Department of Primary Industries, Wollongong.
  13. Williams, A, Hamer, P, Haddon, M, Robertson, S, Althaus, F, Green, M and Kool, J 2017, Determining Blue-eye Trevalla stock structure and improving methods for stock assessment, FRDC final report, FRDC project no. 2013/015

Downloadable reports

Click the links below to view reports from other years for this fish.