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Eastern School Prawn (2020)

Metapenaeus macleayi

  • Matthew D. Taylor (Department of Primary Industries, New South Wales)
  • Anthony Roelofs (Department of Agriculture and Fisheries, Queensland)
  • Victorian Fisheries Authority (Victorian Fisheries Authority)

Date Published: June 2021

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Summary

Eastern School Prawn fisheries occur along the east coast of Australia. Stock status is sustainable in QLD, NSW and VIC.

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Stock Status Overview

Stock status determination
Jurisdiction Stock Stock status Indicators
Queensland Queensland Sustainable

Catch, CPUE, risk assessment

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Stock Structure

Eastern School Prawn fisheries occur along the east coast of Australia, in Queensland, New South Wales and Victoria. Genetic work on the biological stock structure of this species is limited. There is evidence for some minor genetic differentiation of Eastern School Prawn in the Tweed River and Noosa River from Eastern School Prawn in other estuaries, but estuaries within New South Wales appear to be generally genetically homogenous [Mulley and Latter 1981]. No genetic information is available for Victorian populations.

As a result of uncertainty regarding the biological stock structure of Eastern School Prawn, assessment of stock status is presented at the jurisdictional level—Queensland, New South Wales and Victoria.

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Stock Status

Queensland

Biomass and fishing pressure evidence for the status of Eastern School Prawn in Queensland is primarily derived from the River and Inshore Beam Trawl Fishery (RIBTF), which targets this species. Catch and effort within the East Coast Otter Trawl Fishery is opportunistic and highly variable, and has not been used to determine stock status. Annual catches in the RIBTF have tended to be variable, peaking at more than 130 tonnes (t) in 1991, 1995 and 2004, but averaging 52 t over the entire period 1990–2019 [QFISH 2020]. The mean annual catch (4 t) in recent years (2013–19) has been well below the long-term average. Nominal catch rates were reasonably stable over the early part of the fishery and then increased from 47 kg per day in 2000 (64 per cent of the 1990–2019 long-term average of 82 kg per day) to more than 183 kg per day in 2018 and 2019 (>123 per cent above the long-term average). Eastern School Prawn inhabit numerous estuarine habitats in Queensland and a portion of this biomass remains unfished, with fishing effort being confined to accessible sections of larger river systems due to vessel size. The above evidence indicates that the biomass of this stock is unlikely to be depleted and that recruitment is unlikely to be impaired.

Fishing effort has declined steadily over the history of the fishery, particularly since 2009, following several licence reduction schemes. After fluctuating around an average of about 930 days fished per year from 1990–2010, effort decreased to around 280 days fished per year over the 2011–13 period, declining further to average about 26 days fished per year in 2014–19 [QFISH 2020]. An ecological risk assessment established that Eastern School Prawn had a high resilience to fishing pressure [QDAF 2018], and found that the species was at a low risk of being overfished at 2009 effort levels (760 days, 20 vessels). Current effort (days fished) is substantially less than 2009 effort levels and the number of licences reporting catch is also at historically low levels. This current low level of fishing mortality is unlikely to cause the stock to become recruitment impaired.

On the basis of the evidence provided above, Eastern School Prawn in Queensland is classified as a sustainable stock.

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Biology

Eastern School Prawn biology [Rowling et al. 2010]

Biology
Species Longevity / Maximum Size Maturity (50 per cent)
Eastern School Prawn Male 32 months, 32 mm CL Female 32 months, 32 mm CL Male 97 mm TL Female 132 mm TL
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Distributions

Distribution of reported commercial catch of Eastern School Prawn

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Tables

Fishing methods
Queensland
Commercial
Beam Trawl
Otter Trawl
Net
Recreational
Cast Net
Beach Seine
Indigenous
Various
Management methods
Method Queensland
Commercial
By-catch reduction devices
Effort limits
Limited entry
Spatial closures
Temporal closures
Vessel number restrictions
Recreational
Gear restrictions
Possession limit
Catch
Queensland
Commercial 2.53t
Indigenous Unknown
Recreational Unknown

Queensland – Indigenous (management methods) for more information see https://www.daf.qld.gov.au/business-priorities/fisheries/traditional-fishing

New South Wales – Commercial (Management Methods) Size limit – Prawn counts apply to commercial fisheries in NSW and serve as a proxy to size limit.

New South Wales – Indigenous (Management Methods) see https://www.dpi.nsw.gov.au/fishing/aboriginal-fishing.

New South Wales – Recreational (Catch) Murphy et al. [2020].

Victoria – Indigenous (Management Methods) A person who identifies as Aboriginal or Torres Strait Islander is exempt from the need to obtain a Victorian recreational fishing licence, provided they comply with all other rules that apply to recreational fishers, including rules on equipment, catch limits, size limits and restricted areas. Traditional (non-commercial) fishing activities that are carried out by members of a traditional owner group entity under an agreement pursuant to Victoria’s Traditional Owner Settlement Act 2010 are also exempt from the need to hold a recreational fishing licence, subject to any conditions outlined in the agreement. Native title holders are also exempt from the need to obtain a recreational fishing licence under the provisions of the Commonwealth’s Native Title Act 1993.

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Catch Chart

Commercial catch of Eastern School Prawn - note confidential catch not shown

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References

  1. Ives, MC, Scandol, JP, Montgomery, SS, Suthers, IM, 2009, Modelling the possible effects of climate change on an Australian multi-fleet prawn fishery, Marine and Freshwater Research, 60: 1211-1222
  2. Mulley, J, Latter, B, 1981, Geographic differentiation of eastern Australian penaeid prawn populations, Marine and Freshwater Research, 32: 889–895.
  3. Murphy, JJ, Ochwada-Doyle, FA, West, LD, Stark, KE, Hughes, JM, 2020. The NSW Recreational Fisheries Monitoring Program - survey of recreational fishing, 2017/18. NSW DPI - Fisheries Final Report Series No. 158
  4. Pinto, U, Maheshwari, B, 2012, Impacts of water quality on the harvest of school prawn (Metapenaeus macleayi) in a peri-urban river system, Journal Of Shellfish Research, 31: 847–853.
  5. QFish, Department of Agriculture and Fisheries, www.qfish.gov.au
  6. Queensland Department of Agriculture and Fisheries 2018, An ecological risk assessment of the East Coast Trawl Fishery in southern Queensland including the River and Inshore Beam Trawl Fishery, Queensland Department of Agriculture, Fisheries and Forestry, Brisbane.
  7. Racek, AA, 1959, Prawn investigations in eastern Australia, State Fisheries Research Bulletin, 6: 1–57.
  8. Rowling, K, Hegarty, A and Ives, M, 2010, Status of fisheries resources in NSW 2008–09, New South Wales Industry and Investment, Cronulla.
  9. Ruello, NV, 1973, Influence of rainfall on distribution and abundance of school prawn Metapenaeus macleayi in Hunter River Region (Australia), Marine Biology, 23: 221–228.
  10. simpleSA: A package containing functions to facilitate relatively simple stock assessments. R package version 0.1.18.
  11. Taylor, M.D. 2020 Status of Australian Fish Stocks 2020—NSW Stock Status Summary—Eastern School Prawn (Metapenaeus macleayi).

Downloadable reports

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