4 results

Australian eel aquaculture industry development strategy & associated investment analysis

Project number: 2000-264
Project Status:
Completed
Budget expenditure: $60,000.00
Principal Investigator: Geoff Gooley
Organisation: Agriculture Victoria
Project start/end date: 23 May 2001 - 28 Mar 2004
Contact:
FRDC

Need

Before proceeding to implementation of the R&D plan, FRDC has now identified the logical next step in addressing the strategic needs of the eel aquaculture industry sector. Indeed the FRDC has determined that the R&D Plan in itself is insufficient to determine an appropriate level of R&D investment in eel aquaculture in the absence of key business and economic information. Such a nexus is consistent with the vagaries of many new and developing aquaculture species. Furthermore, there are few examples/templates of such information databases to support R&D investment decisions for such new commercial entrants.

Specifically, the need to describe an appropriate industry development strategy, together with an analysis of the investment potential for eel aquaculture in Australia, is now needed. This strategy is intended to complement the R&D strategy and effectively provide the commercial rationale for further investment in eel R&D and associated industry development in Australia.

Although intended to focus on the new and developing eel aquaculture sector in Australia, the proposed analysis is expected to also address attendant issues relevant to the wild glass eel and elver fishery, recognising the need for wild seedstock to support eel aquaculture at the present time. Furthermore, the analysis will consider both existing commercially significant eel species in Australia, viz., shortfinned and longfinned eels.

Objectives

1. To analyse shortfin and longfin eel aquaculture investment potential in Australia, including development of an appropriate Decision Support Information database for Government and industry
2. To determine strategic guidelines for development of the Australian shortfin and longfin eel aquaculture industry, including evaluation of national R&D priorities.

Final report

Assessment of the impacts of hydro-electric dams on eel stocks in Tasmania and an evaluation and assessment of mitigation strategies

Project number: 2000-186
Project Status:
Completed
Budget expenditure: $282,684.00
Principal Investigator: Phillip Boxall
Organisation: University of Tasmania (UTAS)
Project start/end date: 23 May 2001 - 9 Aug 2004
Contact:
FRDC

Need

Stock enhancement strategies can be a cost-effective means of restoring or maintaining fisheries, and have proven essential in catchments with barriers to migration (Knights and White 1998). Regulation of natural river systems has obstructed eel migration in many catchments, and with the implementation of appropriate management tools such as fish passes / ladders and translocation through trapping / netting programs, restoration of stocks can be achieved. Such strategies have not only proven successful in increasing commercial fishery yields, but also contribute to enhanced spawning stocks and increased silver eel escapements.

Hydro electric operations (dams and power generating turbines) reduce the chance of successful emigration of silver eel, especially for larger female eel (Dekker 1999), and, depending on flow and turbine type and number, may represent a major source of mortality to pre-spawning adults (Ritter et al 1997).The design of downstream passage ways and the use of non-generating periods to reduce mortality have been trialled and implemented in New Zealand, the USA and Europe, but have yet to be adopted or investigated in Australia.

The sustainability of the eel resource in Tasmania and of existing (and potentially new) commercial eel fisheries in hydro-impounded catchments will ultimately depend on the implementation of appropriate and effective mitigation strategies (passage and/or translocations) specific to both upstream and downstream migrations.

This proposed program addresses the issue of sustainability by assessing both cause and effect of impacts and various mitigation options. It is envisaged that the results and recommendations arising from this proposed study will underpin the development of an integrated management strategy for managing eel fisheries in hydro-impacted catchments with direct benefits to managers and industry alike. Results from this study could be readily transferred to other States, with coordination and dissemination through the existing Australian and New Zealand Eel Reference Group (ANZERG).

REFERENCES

Dekker, W. 1999. Effects of Transfers and Restocking of Eel. Report of the EIFAC Working Group on Eels - Denmark, September 1999. Pp13-17.

Knights, B. and E. White, 1998. An appraisal of stocking strategies for the European eel, Anguilla anguilla - In Cowx, I.G. (ed): Stocking and Introduction of Fish. Fishing News Books. Pp 121-140.

Ritter, J.A., Stanfield, M. and Peterson, R.H. 1997. The American Eel in Eastern Canada - Stock Status and Management Strategies. Proceedings of Eel Workshop January 13-14 1997, Quebec City, QC. Can. Tech. Report 2196. 174p.

Objectives

1. To assess the impacts of hydro-electric dams on eel migrations and eel population structure in Tasmania’s lakes and rivers and to assess the impact of past elver restocking practices in hydro-impounded catchments on eel populations within those catchments.
2. To assess the direct impacts of hydro-electric dams and associated operations (turbine intakes and water management practices) on adult ‘silver’ eel survival rates during their downstream spawning migrations
3. To evaluate various management tools (ladders / bypasses and passage
netting / trapping and translocation) to mitigate impacts and provide recommendations for implementation.
4. To review the management of barriers to eel migration, including overseas experience.

Final report

Assessment of eastern Australian glass eel stocks and associated eel aquaculture

Project number: 1997-312
Project Status:
Completed
Budget expenditure: $749,969.01
Principal Investigator: Geoff Gooley
Organisation: Agriculture Victoria
Project start/end date: 21 Jun 1997 - 7 Jun 2004
Contact:
FRDC

Need

Due to the demand for glass eel seedstock worldwide and the apparent decline of such stocks and their consequent high value, it is highly probable that increasing pressure will be placed on Australian stocks of glass eels, particularly from overseas producers. This will result in increased pressure on State Fisheries Agencies to manage a presently undefined resource. It is therefore critical that glass eel stocks are defined and quantified so that appropriate management can be determined. Establishment of key glass eel waters (for both long and short-finned eels), modelling of key environmental, climatic and oceanic migration stimuli, development of sustainable harvesting methods and an improved understanding of the population biology are critical for the appropriate management of Australian glass eel stocks. The proposed project therefore identifies the need for coordinated research over the entire known range of short and long-finned eels (ie. Queensland, NSW, Victoria and Tasmania), hence the development of a joint research proposal between these state agencies, as the next logical step from the present short-finned eel project in Victoria and Tasmania only.

To maximise the value of glass eel stocks in Australia, culture methods need to be developed for both eel species. Existing intensive and semi-intensive culture methodology and findings from short-finned eel culture trials in the current FRDC funded eel project can be adapted and developed to establish methodologies for local production of both eel species.

Furthermore, there should be no potential for export of glass eels. Should commercial-scale glass eel resources be defined in Australia as the current FRDC funded eel project and preliminary sampling in Queensland suggest, then it could potentially provide an important boost to productivity in Australian industry, provide the opportunity for value-adding to a natural resource through aquaculture and substantially increase the competitiveness of the Australian industry in the major European and Asian export markets.

Objectives

1. To characterise migrations and assess stocks of glass eels in coastal catchments of southern Queensland, NSW, Victoria and Tasmania to enable evaluation of the potential of seedstock supply for Australian aquaculture.
2. Develop pond and tank culture technology for commercial Australian eel production, with an emphasis on the use of eastern drainage Australian glass eel seedstock.
3. To contribute to the development of eel aquaculture industry development plans and fisheries management plans through the provision of relevant information in the form of reports, publications, seminars, newsletters and workshops.

Final report

ISBN: 0-7311-5090-2
Author: Geoff Gooley
People
PROJECT NUMBER • 2002-652
PROJECT STATUS:
COMPLETED

Aquatic Animal Health Subprogram: enhancement of the emergency disease management capability in Victoria - developing a Victorian Control Centres Management Manual

AQUAVETPLAN and its associated manuals, and in particular the ‘AQUAVETPLAN Control Centres Management Manual’ provide the necessary framework for the development of a Victorian management/operational manual that would meet the planning needs in relation to aquatic animal diseases. The...
ORGANISATION:
Agriculture Victoria
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