18 results

Investigation and improvement of live Blue Swimmer Crab handling in NSW

Project number: 2018-024
Project Status:
Completed
Budget expenditure: $102,107.00
Principal Investigator: Paul Exley
Organisation: Department of Primary Industries (QLD)
Project start/end date: 1 Apr 2019 - 27 Aug 2020
Contact:
FRDC

Need

As the NSW fishing industry moves forward into the future with quota managed fisheries, there is a need for industry to develop procedures and process on catching, holding and transporting Blue swimmer crab that would value add to the wild harvest sector’s product – particularly for the live sales market.

The current market is predominantly made of sales of cooked and raw blue swimmer crabs. An approx. price range of blue swimmer crab for 2015 / 2016 was $8.50 $9.00 per kilo. The live trade in blue swimmer crab in 2016 / 2017 is approx. $20.00 per kilo. A move to selling into the live market would provide a better return for effort and would help in maximizing return on investment in the blue swimmer crab quota fishery.

The “Live Blue Swimmer Crab” trade is in its infancy and it is timely to invest in technologies that will assist in lowering the mortality rates of these animals. Any investment now will accelerate the development of this fishery and ensure the best chance for the restructure of the NSW fishery to achieve its goals.ie viability and efficient use of a quota species.

The industry needs to have an easy to read handling guideline developed and training workshops to improve their access to the market and reduce mortality rates.

Objectives

1. To produce handling guidelines and conduct a series of industry training workshops to reduce the mortality rate of blue swimmer crabs and thereby increase the volume of live product to market
2. To improve fishermen returns who adopt the guidelines and undertake the training provided

Final report

Author: Paul Exley and Donna Cawthorn
Final Report • 2025-02-19 • 2.65 MB
2018-024-DLD.pdf

Summary

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 2019, the research was conducted by an experienced team of scientists at the Queensland Department of Primary Industries (DPI) in Coopers Plains, Brisbane. The primary objective was to develop effective handling protocols to improve the survival rates of Blue Swimmer Crabs from capture to market, thereby increasing the volume and quality of crabs available for sale. The study combined extensive literature review, laboratory trials and stakeholder engagement to provide a practical framework for fishers wishing to pursue the live Blue Swimmer Crab market, focusing on methods to reduce stress, minimise mortalities and maximise marketable yields.

Industry
PROJECT NUMBER • 2017-238
PROJECT STATUS:
COMPLETED

Water treatment to control influent water biosecurity risk on Australian prawn farms. Effectiveness and impacts on production ponds.

This project assessed the performance of mechanical filtration as a means by which Australian prawn farmers could lower the risk of disease agent transfer into farms by selective removal of disease hosts and other vectors naturally present in farm source water. The project sought to provide...
ORGANISATION:
Department of Primary Industries (QLD)
People
Industry
PROJECT NUMBER • 2017-057
PROJECT STATUS:
COMPLETED

Stock predictions and spatial population indicators for Australia's east coast saucer scallop fishery

This project undertook analyses to understand the role of overfishing and the environment on saucer scallops. The analyses indicated reduced numbers of spawning scallops. Historical levels of fishing and environmental influences such as from increased sea surface temperatures (SST) have amplified...
ORGANISATION:
Department of Primary Industries (QLD)
Industry
PROJECT NUMBER • 2017-048
PROJECT STATUS:
COMPLETED

Improving mortality rate estimates for management of the Queensland Saucer Scallop fishery

This research was undertaken on the Queensland saucer scallop (Ylistrum balloti) fishery in southeast Queensland, which is an important component of the Queensland East Coast Otter Trawl Fishery (QECOTF). The research was undertaken by a collaborative team from the Queensland Department...
ORGANISATION:
Department of Primary Industries (QLD)
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)
Industry
PROJECT NUMBER • 2017-019
PROJECT STATUS:
COMPLETED

Freshwater fish attracting structures (FAS): Evaluating a new tool to improve fishing quality and access to fisheries resources in Australian impoundments

This document has been compiled from various sources and, to the authors’ knowledge, represents the best advice currently available regarding the use of fish attracting structures to improve recreational angling in Australian impoundments. Although the principles outlined in this document may...
ORGANISATION:
Department of Primary Industries (QLD)

Improving survival and quality of crabs and lobsters in transportation from first point of sale to market.

Project number: 2017-018
Project Status:
Completed
Budget expenditure: $158,459.00
Principal Investigator: Sue Poole
Organisation: Department of Primary Industries (QLD)
Project start/end date: 10 Sep 2017 - 25 Sep 2019
Contact:
FRDC

Need

Industry producers and processors have identified that crabs and lobsters suffer quality deterioration
during transportation, which then results in downgrading and consequent price reduction. As lobsters and crabs are highly sought products, losses incurred through current handling chains cause significant waste of this valuable resource. In NSW eastern rock lobster, mud crab and spanner crab resources are fully fished and hence, full revenue return can only be gained by mitigating the wastage occurring.

It is known that quality loss in crustaceans is often caused by stress imposed along the supply chain. To reduce the likelihood of downgrading of product, there is a need to undertake an examination of the handling and transport issues pertinent to various landing ports, distribution chains and market sales points. Identification of specific stress factors and where they occur most severely will enable development of specific mitigation measures for Industry implementation.

The need for the research was noted in the NSW FRAC research priorities, 2016.

Objectives

1. Document current handling practices and transport pathways within the three crustacean industries and identify the factors contributing most to animal stress
2. Develop adapted handling and transport protocols that minimise the critical stress factors
3. Trial amended protocols within commercial operations
4. Evaluate success by change in number of downgrades and market price achieved for live product
5. Extend knowledge to industry sectors and encourage adoption by demonstration of protocols at local port meetings.

Final report

ISBN: 978-0-7345-0466-1
Author: Sue Poole and Paul Exley
Final Report • 2020-05-01 • 1.66 MB
2017-018-DLD.pdf

Summary

Eastern rock lobsters, spanner crabs and mud crabs command a high price when supplied to the market as live product. Being aquatic animals, the demands to retain maximum quality and liveliness through the supply chain are challenging. Once taken from water, these crustaceans are subject to multiple hurdles resulting in cumulative stress and diminishing probability of survival. For the past two years, scientists from Queensland Department of Agriculture and Fisheries have been working with the New South Wales (NSW) crab and lobster Industries to determine ways to reduce stress imposed on the animals from capture to market. Through temperature monitoring along the supply chain, two key areas were identified as having high impact on the crustaceans. Handling by individual fishers from point of capture was critical to keep animals cool, damp, out of light and with minimal disturbance. Temperature during transport of crabs and lobsters often imposed severe stress, arising from truck refrigeration temperatures being set below the tolerance of live animals and the influence of cold truck floor-beds reducing live animal temperatures. The importance of careful handling after capture was emphasised with fishers and co-operative management staff regularly at every landing location visit. Simple modifications for protecting live animals from cold temperatures during transport were developed to reduce stress on the live animals. The benefit gained from adapted practices was successfully demonstrated within commercial operations.
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