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Environment
PROJECT NUMBER • 1984-020
PROJECT STATUS:
COMPLETED

The fishery for red spot king prawns (Penaeus longistylus) off the central Queensland coast

The fishery for king prawns which occurs between 18°S and 21°S has been investigated over a three year period. The fishery takes place predominantly during winter months. Availability of alternative target stocks as well as recruitment timing is responsible for the fishery's timing. Annual...
ORGANISATION:
Department of Primary Industries (QLD)
Environment
PROJECT NUMBER • 1983-032
PROJECT STATUS:
COMPLETED

Port Phillip Bay and Bass Strait scallop research

During the 3 years of the study, scallop spatfall was observed to occur over a short period (October-December) after the scallops had spawned in spring. Growth was rapid and scallops reached an acceptable harvestable size of 70mm within 16 months. Spatfall one year can therefore be related to...
ORGANISATION:
Agriculture Victoria
Industry
PROJECT NUMBER • 2022-137
PROJECT STATUS:
COMPLETED

Ensuring market-focused value adding capabilities are available to SA Seafood companies today and through to 2030

Context Fresh premium seafood has long been the best pathway to a viable consumer. That remains true for premium SA wildcatch species (e.g., rock lobster, prawn, abalone) that are, and will continue to be, prosperous. But processing and value adding have never been more critical to attract retail...
ORGANISATION:
Ridge Partners

Tactical Research Fund: Shark Futures - determining the most suitable index of abundance for the school shark (Galeorhinus galeus) stock assessment: review and future directions to ensure best recovery estimates

Project number: 2011-078
Project Status:
Completed
Budget expenditure: $39,717.72
Principal Investigator: Charlie Huveneers
Organisation: SARDI Food Safety and Innovation
Project start/end date: 31 May 2012 - 30 Nov 2012
Contact:
FRDC

Need

Theme 1 - Demonstrating Sustainability: Evidence-Based and Low Risk Management for Shark-Associated Fisheries

Since 1992, school shark stocks were assessed as overfished in Australia and has been ever since. The most recent stock production of school sharks was estimated between 9–14% of original levels leading school sharks to be considered seriously overfished and listed as Conservation Dependent under the EPBC Act 1999. Under such listing, a stock rebuilding strategy policy had to be developed and needs to be implemented as conditions of the SESSF Wildlife Trade Operation (WTO) accreditation. The objectives of this rebuilding strategy states that school shark stocks have to recover to the limit reference biomass level within a biologically reasonable timeframe. The TAC for incidental take of the species was progressively reduced to well below the sustainable yield estimated by the SharkRAG. Although this reduction of TAC was considered to be sufficient, current models suggest school shark stocks will not rebuild within the period required under the Rebuilding Strategy. This lack of recovery is in apparent disagreement with catch observations by fishers and SharkRAG industry members. However, management of the stock aimed at reducing catch levels has altered the fishing pattern so that the traditional CPUE index of abundance can no longer be relied on as an index of stock size for school shark. The model is therefore unable to update current assumptions regarding the productivity of the stock. If the model is in error regarding such productivity, so that rebuilding is occurring at a faster or slower rate than predicted, such trends will not be identified. Such uncertainty associated with the school shark assessment has to a significant extent paralysed SE MAC consideration of management arrangements for this species. A valid index of abundance that will reveal current trends in stock status is required.

Objectives

1. Identify key scientists able to provide advice regarding suitable indices of abundance
2. Organise a 2-day workshop to foster discussion about an index of abundance for the SESSF school shark stock
3. Review of the current stock assessment and identify the potential issues leading to uncertainties regarding model outputs
4. Consider and assess alternative indices of abundance for school shark to input into the stock assessment model
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