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National Strategy for the Survival of Released Line Caught Fish: planning, project management and communications

Project number: 2002-099
Project Status:
Completed
Budget expenditure: $518,889.00
Principal Investigator: Bill Sawynok
Organisation: Infofish Australia Pty Ltd
Project start/end date: 13 Sep 2002 - 30 Sep 2004
Contact:
FRDC

Need

Nationally about 25-30% of the Australian population participates annually in recreational fishing. This equates to around 5m people.

The Fishcount survey in Northern Territory in 1995 found 0.8 million of all fish caught (43%) were released. The 1997 RFISH survey in Queensland showed that 24.4 million of all fish caught (53%) recreational were released. A similar survey in 1999 showed that 24.8 million of all fish caught (51%) were released. Rates of captured tagged fish that are released in Suntag in Queensland have risen from 38% in 1990/91 to 54% in 2000/01. The National Recreational and Indigenous Survey found that around 30% of fish caught in Australia were released. The total number of fish released nationally is not yet available although an early estimate is that about 100 million fish are caught annually by recreational fishers. The rate of survival of the released fish is unknown.

Regulation of recreational catches through bag and size limits and participation in catch and release fishing are resulting in the high level of fish being released. Where bag limits are set low (eg 2-3 fish), fishers are undertaking a form of high grading as part of their strategy to get more trophy fish. More and more Australian fisheries are becoming subject to management plans with increased regulation that reduces the numbers of fish that can be kept. Recreational fishers are also becoming more aware of the need to conserve fish stocks and are practicing catch and release as a means of minimising their own impact and maximizing the quality and enjoyment they obtain from fishing. These factors will ensure that the trend towards releasing fish continues to grow.

Information on handling fish is being distributed and used by recreational fishers but this is being done in an ad hoc manner with limited scientific input, not necessarily based on best practices and no overall objectives or delivery strategy.

As a result of this:

1) Fishers catch a lot of fish that are released, particularly undersize target species.
2) There is a considerable amount of information on fish release techniques from Australia and in particular overseas – the problem is not lack of data.
3) The key outcome is management of fisher’s behaviour to ensure they are informed and trained in best practice.
4) This requires a culture change – fisheries management is about managing people not fish.
5) This application uses a different paradigm from usual fisheries projects in that it aims to build on known information and through involvement of industry change behaviour.
6) The key R&D need is to:
a) Develop a package of communication products from known information that fits the target audience.
b) Assess the attitudes and practices of existing recreational fishers to obtain a benchmark.
c) Using a wide range of communication and extension techniques to deliver information on fish survival strategies.
d) Quantify the performance of the communication strategy and recommend changes to improve adoption.
e) Given that this initiative will involve several related projects and future investment to achieve the planned outcomes there is a need to provide a mechanism for a greater level of project management similar to what FRDC provides for a subprogram activity.
7) The strategy will have the added benefit in that it will also inform the broader community on the responsible way recreational fishers are approaching sustainability of fish.

To deliver the planned outcomes will require investing in various aspects of line caught fish survival and a mechanism is required to plan, manage and deliver on this R&D investment. There is a need for the interim steering committee to be formalised to guide the development and implementation of the national strategy.

Objectives

1. To develop and implement a communication and extension program based on the best current available knowledge for releasing line caught fish by recreational fishers.
2. To assess changes in different recreational sectors and regional groups on their adoption of best practice line caught release methods and provide recommendations for improvement.
3. To transfer ongoing responsibility for the developed communication and extension program to the recreational sector.
4. To provide national leadership for Australia’s investment in R&D in line caught fish survival.

Final report

Enhancement of yabbie production from Western Australian farm dams

Project number: 1994-075
Project Status:
Completed
Budget expenditure: $350,948.14
Principal Investigator: Noel Morrissy
Organisation: Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date: 20 Jul 1994 - 25 Mar 1999
Contact:
FRDC

Objectives

1. To increase harvests from WA farm dams by providing farmers with: Population control method(s) which increase the proportion of yabbies of marketable weights
2. Quantified methods for reducing dam environmental factors limiting yabbie production and causing variation in dam productivity
3. a manual of methods for stocking and managing farm dams to increase harvest per dam

Final report

ISBN: 0 7309 1984 6
Author: Craig Lawrence
Final Report • 1998-11-23 • 1.78 MB
1994-075-DLD.pdf

Summary

Farmers receive higher prices per kilo for large yabbies.  Yabby farmers have reported that the majority of yabbies trapped from farm dams are below market size (< 30 g) and therefore of no economic value.  In addition, farmers also report that while dams produce large yabbies when first harvested, after a number of years the proportion of large animals gradually decreases.

To identify why yabbies in farm dams stunted and how farmers could increase the size of small yabbies the project had three main experimental areas: Research station experiments, industry farm dam recording system, and Genetics and Reproduction Laboratory.

This project has shown that population control methods to increase the proportion of marketable yabbies are required. This study has also shown that it is possible to convert yabbies below market size (< 30) to high value animals by improving feeding and management practices. The application of these results will produce larger yabbies and directly result in increased returns to farmers. In addition the increase in market-sized yabbies from farm dams will provide a higher catch rate per unit of trapping effort.  Consequently, the harvesting of yabbies from more isolated dams will become economically viable. 

Keywords:  Cherax albidus, crayfish culture, pond culture, aquaculture techniques, feeding, stocking density, reproduction, hybrid culture.

Project products

Manual • 10.01 MB
1994-075 Yabby Farming Book Frequently Asked Questions Lawrence Morrissy2000.pdf

Summary

Yabbies are indigenous to central and eastern Australia and have created considerable aquaculture interest. Although some yabbies are produced in ponds on purpose-built farms, the vast majority of commercial aquaculture yabby production in Australia comes from trapping yabbies in farmers’ dams. This use of existing farm dams originally built to water stock has enabled rapid expansion of the industry due to low entry costs. The yabby industry currently harvests around 4,000 farm dams, with most spread throughout Western Australia’s  wheatbelt region.

The aim of this information is to assist farmers already engaged in this interesting and unusual new industry,  and to encourage more people to become involved.  Much of the information contained in this publication is the result of a research program jointly supported by Fisheries WA, FRDC, Aquaculture Development Fund (WA), the WA yabby industry, Agriculture WA and The University of Western Australia, Animal Science Group, Faculty of Agriculture. This document replaces Yabby Questions and Answers (1995) by N Morrissy, Aquainfo #1, Fisheries Department of WA.

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