18 results

Prawn and Crab harvest optimisation: a biophysical management tool

Project number: 2008-011
Project Status:
Completed
Budget expenditure: $299,901.00
Principal Investigator: Stephen Mayfield
Organisation: SARDI Food Safety and Innovation
Project start/end date: 30 Sep 2008 - 29 Sep 2010
:

Need

1) There is need to incorporate environmental data in understanding larval dispersal and stock-recruitment relationships for two major crustacean fisheries, prawns and blue crabs, in SG.
2) There is a need to identify regions critical for spawning and settlement success for prawns and blue crabs.
3) There is a need to develop optimal harvesting strategies for prawns during the pre-Christmas fishing period, to maximise catch and minimise the impact on future recruitment to the fishery.
4) There is a need to understand the effect natural variations in physical environmental parameters (including winds and tides) have on larval ecology and recruitment success for prawns and blue crabs in SG.
5) There is a need to develop tools to inform on the threat for major fishery resources from climate change by understanding impacts of temperature change on stock-recruitment relationships for these fisheries.

Objectives

1. Develop biological models for the reproductive and larval biology of prawns and blue crabs.
2. Develop a passive particle hydrodynamic model of Spencer Gulf.
3. Develop the base case physical/biological model for prawns and blue crabs. Conduct sensitivity studies for different scenarios of environmental conditions (e.g. water temperature, wind strength).
4. Determine scenarios to optimise the harvest of western king prawns during the early spawning season.
Industry
PROJECT NUMBER • 2016-213
PROJECT STATUS:
COMPLETED

Building economics into fisheries management decision making - to utilise a suite of SA case studies

The aim of this project was to develop a set of economic analysis guidelines for use at an individual fishery level to aid harvest strategy and other fisheries management decisions. The project sought to demonstrate how economics can be incorporated in fisheries management frameworks in lower value...
ORGANISATION:
Econsearch Pty Ltd
Environment
PROJECT NUMBER • 2017-047
PROJECT STATUS:
COMPLETED

Understanding environmental and fisheries factors causing fluctuations in mud crab and blue swimmer crab fisheries in northern Australia to inform harvest strategies

This project investigated relationships between environmental factors and harvests of crabs in the Gulf of Carpentaria (GoC), northern Australia. Desktop correlative analyses clearly indicated that recent fluctuations in the catches of Giant Mud Crabs in the GoC are most likely driven by...
ORGANISATION:
Department of Primary Industries (QLD)
Environment
Environment
PROJECT NUMBER • 1998-208
PROJECT STATUS:
COMPLETED

Habitat modification and its influence on prawn and crab fisheries

Experimental trawling in Gulf St Vincent indicated that epifaunal assemblages experienced substantial trawling mortality, which varied depending on sediment characteristics. Locations with strong currents and coarse sediments experienced minimal effects, whereas those with weak currents and...
ORGANISATION:
SARDI Food Safety and Innovation
Communities
PROJECT NUMBER • 2016-034
PROJECT STATUS:
COMPLETED

Golden fish: evaluating and optimising the biological, social and economic returns of small-scale fisheries

This project investigates recreational and commercial fisher motivations for using a fishery and the beliefs, attitudes and perceived benefits of aquaculture-based enhancement programs and other management options. It also determines the total economic value for recreational fishing for Blue Swimmer...
ORGANISATION:
Murdoch University
Environment
Industry
PROJECT NUMBER • 2018-024
PROJECT STATUS:
COMPLETED

Investigation and improvement of live Blue Swimmer Crab handling in NSW

This report presents pivotal findings from an in-depth investigation into optimising live handling practices for the commercial Blue Swimmer Crab (Portunus armatus) industry in New South Wales (NSW), with the overarching goal of unlocking high-value live trade opportunities. Initiated in...
ORGANISATION:
Department of Primary Industries (QLD)
Communities
PROJECT NUMBER • 2015-220
PROJECT STATUS:
COMPLETED

Isolating social and economic objectives within multiple stakeholder fisheries – a case study: the South Australian Marine Scalefish Fishery

The South Australian Marine Scalefish Fishery (MSF) has sustained extensive management change over time, influencing its demographics. Now fishers in the MSF community are dispersed both physically and in perspective. These factors have made it harder for the MSF to connect with and...
ORGANISATION:
University of Adelaide
Environment
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