589 results

Aquatic disease preparedness assessment

Project number: 1995-087
Project Status:
Completed
Budget expenditure: $12,418.00
Principal Investigator: Mark S. Crane
Organisation: CSIRO Australian Animal Health Laboratory
Project start/end date: 20 Nov 1995 - 22 Jun 1998
Contact:
FRDC

Objectives

1. To assess the current fish disease legislation in each state, territory and New Zealand
2. To recommend improvements in the current legislation and lines of command in the event of a serious fish disease outbreak
3. To determine the requirement for chemicals/vaccines for use during a fish disease outbreak

Final report

ISBN: 0-643-06292-0
Author: Mark S. Crane and Grant T. Rawlin
Final Report • 1997-10-22 • 1.45 MB
1995-087-DLD.pdf

Summary

Prior to the initiation of this project, it was recognised that while State/Territory, as well as Commonwealth, legislation is well-developed for the management of traditional stock animal diseases, legislation has not addressed adequately issues concerning aquatic animal diseases and their control. Thus animal health policy makers established a working party to assess the effectiveness of State/Territory aquatic animal disease legislation in the face of hypothetical, severe fisheries disease outbreaks in public waters, aquaculture sites, in finfish and in aquatic invertebrates.

Accordingly, the Working Party visited each State/Territory to discuss with those officials responsible for managing aquatic animal disease outbreaks, the current status of State legislation, whether the legislation is appropriate and whether the State has adequate resources and legislative support to manage effectively aquatic animal disease emergencies. In this way the strengths and weaknesses of each State/Territory with regard to aquatic animal disease preparedness were identified for further consideration by the local authorities. Over the past two years significant progress on aquatic animal health policy development at the Commonwealth and State/Territory levels has been made and is outlined in this report.

Major outcomes of the project include a significant raising of the profile of aquatic animal disease. At both State/Territory and Commonwealth levels the issue of aquatic animal disease, even in the face of the emergence of newer fisheries industries and a growth in fisheries production, had attracted relatively little attention and hence few resources. During the course of the project, there have been interaction with other projects and activities, coordinated by the Department of Primary Industries and Energy, which has had a synergistic effect on the progress of the issue. Recently, there has been very significant progress on aquatic animal health policy development at State/Territory and Commonwealth Government levels.

In the majority of States/Territories, either new or revised legislation has been enacted, is currently being enacted or current legislation is being reviewed to determine whether revised/new legislation is required. Thus, most of the States/Territories have addressed, or are addressing, the legislative issue.

In addition to ensuring appropriate legislation is in place, each State/Territory is responsible for ensuring the legislation is invoked as needed and effective management of aquatic animal disease emergencies is undertaken. Regardless of the scale of the incident the State/Territory should be notified, and should then make an assessment of appropriate action, ensuring that such action is in accordance with national policy.

Management of an aquatic animal disease emergency will require a collaborative approach and will, primarily, involve expertise in aquatic animal biology and aquaculture systems which would normally reside in State Departments of Fisheries or the equivalent, as well as expertise in animal diseases and epizootiology normally available from State Departments of Agriculture or the equivalent. In some cases, this expertise resides within one department (e.g. Departments of Primary Industries and Fisheries) and coordination of the response presents little difficulty. In other cases, the expertise is not centralised and coordination of the response becomes a more complex issue.

A major achievement, clearly evident, was the bringing together of the principal decision makers required in the event of an aquatic animal disease emergency. In some States/Territories these meetings represented the first instance in which this had occurred for the purposes of aquatic animal disease emergency contingency planning. Hence, together with the respective roles and responsibilities, important linkages were immediately put in place which later formed the basis for development of an action plan. In each State/Territory, a theoretical scenario, an aquatic animal disease emergency relevant to the particular State/Territory, was presented and worked through to its conclusion. This illustrated the resources, responsibilities and roles required for effective management of the emergency.

Aquafin CRC - Atlantic Salmon Aquaculture Subprogram: host-pathogen interactions in Amoebic Gill Disease

Project number: 2001-244
Project Status:
Completed
Budget expenditure: $860,814.00
Principal Investigator: Barbara Nowak
Organisation: University of Tasmania (UTAS)
Project start/end date: 30 Jan 2002 - 23 May 2005
Contact:
FRDC

Need

This project will develop methods and provide information for vaccine and novel treatment development. For example, techniques for the isolation and maintenance of N. pemaquidensis are based on monoxenic cultures. This culture is highly problematic because preparations of protozoa are contaminated with bacteria. Studies to determine cell function, protein and DNA composition have been seriously compromised by the bacteria. Culture relies on the use of agar. Cell propagation and harvesting by this system is time consuming and inefficient. Development of practical systems for cell factory production of N. pemaquidensis is required. This is important for studies of cell wall composition and cell function, which require considerable biomass. There is no model of infection using protozoa derived from monoxenic or xenic cultures. This represents a major limitation, particularly when it is necessary to use controlled doses of a single strain. Current methods rely on the use of N. pemaquidensis harvested from infected fish. While this strategy meets an immediate need, long-term it cannot be justified. Development of a method to grow in vitro virulent protozoa capable of infecting fish is an essential objective. The current library of N. pemaquidensis isolates obtained from fish with AGD is small and in continuous culture for almost 10 years. There is an urgent need to re-isolate N. pemaquidensis and expand the library to ensure an adequate range of phenotypes and genotypes. Preservation of N. pemaquidensis is an essential requirement of the AGD programme as it will maintain strain integrity, a vital objective for vaccine development. The complexity of growing N. pemaquidensis has proved a major limitation to studies on AGD. A centre of expertise in the culture of N. pemaquidensis should result in guaranteed supply of organism. A reference laboratory will ensure standardisation of cultures and uniformity of research outcomes.

Objectives

1. To provide a knowledge base for development of novel treatments and vaccines
2. To identify factors leading to binding of the parasite to fish gills
3. To identify gill conditions which increase the susceptibility of the fish to AGD
4. To develop techniques for in vitro work on Amoebic Gill Disease
5. To expand the library of N. pemaquidensis strains
6. To implement a long term preservation for N. pemaquidensis based on freezing technology
7. To develop improved culture systems based on monoxenic and axenic techniques
8. To develop cell factory capability to produce high density cell suspensions of N. pemaquidensis
9. To develop cell purification techniques to produce pure cell suspension of N. pemaquidensis derived from cell culture and gill associated disease.
10. To implement cell characterisation techniques for strain differentiation
11. To investigate culture strategies to develop infective strains of in vitro grown N. pemaquidensis

Final report

ISBN: 1-86295-222-1
Author: Barbara Nowak
Final Report • 2005-01-17 • 3.54 MB
2001-244-DLD.pdf

Summary

This project significantly increased our knowledge and understanding of Amoebic Gill Disease (AGD).  We developed tools and techniques applicable to further research on AGD and other fish diseases.  This project contributed to education and training in the area of fish health. Five PhD students and three postdoctoral fellows were involved in this project.  Development of case definition for AGD and increased understanding of AGD outbreaks in the field were of particular interest to the salmon industry.  Diagnostic services (Fish Health Unit, DPIWE) collaborated by providing expertise and adopting this project's results.
 
Prior to this project, our knowledge of Amoebic Gill Disease (AGD) was fundamentally limited. An improved understanding of host-pathogen interactions was required to provide a basis from which to develop effective strategies for future control and treatment of the disease.   This was achieved by the development of new techniques and adaptation of existing ones for the study of ecto-parasitic gill disease.
 
This project addressed the need for understanding disease development and progression. Sequential histopathology in both laboratory and field infections identified developmental stages of AGD, in terms of host response and pathogen proliferation and the disease’s strong association with salinity and temperature. This work enabled the introduction of an AGD case definition, providing consistent and repeatable disease interpretation for future studies.

Establishment of a centre for research, consultancy and training on parasites and diseases important to the fishing industry

Project number: 1976-005
Project Status:
Completed
Budget expenditure: $0.00
Organisation: University of Queensland (UQ)
Project start/end date: 28 Dec 1980 - 31 Dec 1980
Contact:
FRDC

Objectives

1. Establish a centre for research, consultancy and training in order to provide a body of expertise with which to avoid or combat existing and future problems associated with fish disease

A research and development program for the Seafood Industry

Project number: 1986-079
Project Status:
Completed
Budget expenditure: $0.00
Organisation: CSIRO Geelong Waurn Ponds
Project start/end date: 27 Jun 1989 - 29 Jun 1989
Contact:
FRDC

Objectives

1. Consultancy services in food technology & engineering.
2. Investigate properties limiting storage life
strategies to control
physiological stress on live fish & shellfish to development handling & live transport systems.
3. Use crustacean waste for human & animal food.

Selective breeding of Pacific oysters (Crassostrea gigas) - does mantle colour have a simple genetic basis?

Project number: 1983-054
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Marc Wilson
Organisation: Department of Natural Resources and Environment Tasmania (NRE TAS)
Project start/end date: 27 Jun 1985 - 29 Jun 1985
Contact:
FRDC

Objectives

1. Determine whether the mantle colour has a simple genetic basis.
2. Determine whether industry can produce oysters of preferred colour by selection of brood stock in the hatchery.
3. Gather comprehensive baseline data on shell shape, volume & meat content

Staying Healthy: Industry organisations’ influence on behaviours and services used by fishers

Project number: 2012-402
Project Status:
Completed
Budget expenditure: $98,308.00
Organisation: Deakin University Geelong Waterfront Campus
Project start/end date: 19 Jun 2012 - 4 May 2014
Contact:
FRDC

Need

Research has found that fishers are subject to a multitude of stressors, including those relating to government policies and co-management challenges, a fluctuating market place, crew cohesion and on-shore social relationships, and the pressures of working in a dangerous workplace. Compounding the well-known physical dangers associated with the fishing industry, these factors all place pressure on fisher mental wellbeing, which in turn contributes to issues such as clinically diagnosed anxiety disorders, poor eating habits and substance abuse, eg, evidence from around the world suggests that the particular stresses of fishing contribute to higher than average rates of smoking among fishers.
Findings from the RIRDC-funded project Staying Healthy: Behaviours and services used by farmers and fishers indicate that while participants from certain farming industry areas have benefited from industry involvement in health and wellbeing, including in relation to mental health, fishers are less likely to report that industry associations have helped them access health and wellbeing information or programs. Some farmers described significant lifestyle changes after participating in programs that were promoted, sponsored or facilitated by trusted industry organisations. As well, recent research (Brooks, 2011, Health and Safety in the Australian Fishing Industry, RIRDC, Canberra) has found a lack of awareness of occupational health and safety among fishers. The Research Audit of Social Sciences Fisheries Research (Clarke, 2009) noted research findings that social wellbeing is related to financial wellbeing, and that social networking is negatively affected by working hours, suggesting a place for an industry specific approach to social connection and mental health. There appears to be a broking role for industry groups and organisations in enhancing the health of the fishing workforce. This project will identify strategies for industry and fishing community organisations to take on this role in effective, but cost and resource efficient, ways.

Objectives

1. to explore how industry supports fisher physical health and mental wellbeing
2. to develop and trial a set of case studies and best practice guidelines for industry organisations in enhancing fisher health and wellbeing in collaboration with industry, fishing communities and health stakeholders
3. to evaluate the case studies and best practice guidelines

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

Workshops on analytical techniques for trace concentrations of heavy metals in marine tissues

Project number: 1978-016
Project Status:
Completed
Budget expenditure: $0.00
Organisation: CSIRO Oceans and Atmosphere Cleveland
Project start/end date: 28 Dec 1979 - 31 Dec 1979
Contact:
FRDC

Objectives

1. Determine the most accurate, reliable and practicable techniques of measuring trace amounts of zinc, cadmium, lead, copper, arsenic, selenium and chromium in fish and other marine tissue

Aquafin CRC - Atlantic Salmon Aquaculture Subprogram: model development for epidemiology of Amoebic Gill Disease

Project number: 2001-245
Project Status:
Completed
Budget expenditure: $322,051.00
Principal Investigator: Barbara Nowak
Organisation: University of Tasmania (UTAS)
Project start/end date: 30 Jan 2002 - 23 May 2005
Contact:
FRDC

Need

The Australian salmon industry is free from the major infectious diseases affecting salmon industries in other countries. Amoebic Gill Disease is the main infectious disease affecting the salmon industry in Tasmania. While this disease occurs in other countries, it does not appear to be as severe as in Australia. The disease-related fish mortalities are greatly reduced by freshwater bathing, however the disease treatment results in greater production costs and reduces the Australian salmon industry’s ability to compete in international markets. While development of a vaccine to protect against the causative agent is a desirable solution for the industry, it must be appreciated that this is a challenging task and requires a long-term view. In the meantime, the industry needs more knowledge of AGD epidemiology and more tools to improve management of fish with AGD on the farms, which would improve AGD treatment and control and decrease the risk of large outbreaks of AGD. As a direct result this should lead to reduced production costs. Improved understanding of the epidemiology of the disease will also provide a valuable basis on which to develop strategies for vaccine application in the future.

The ultimate goal is to have an AGD surveillance system in place, to provide information about the host, agent and environment which is relevant to prevention and management of the disease. The results will improve our understanding of factors contributing to AGD outbreaks and will develop a best industry practice protocol aimed at the reduction of AGD effects on the salmon industry in Tasmania. Information from the surveillance system will facilitate better decisions on the timing of treatments as well as provide long term data for analysis to identify additional management strategies aimed at minimisation of disease risks and economic impacts. Specifically, farm-level surveillance data will eventually provide a basis for measuring spatial and temporal trends in AGD occurrence in both the host and potential reservoirs as well as environmental and production factors associated with changes in AGD occurrence. Analysis of retrospective data will permit the identification of improved management strategies as well as providing farm managers with a more reliable basis on which to make decisions on prevention and control. This project will provide ways of value adding to the data collected by the salmon industry in general. It will protect individual company interests with respect to privacy of commercial information.

Objectives

1. Identification of Neoparamoeba pemaquidensis reservoirs
2. Identification of risk factors for AGD including the spatial relationship between infected and uninfected cages.
3. Development of a pilot surveillance system

Final report

ISBN: 1-86295-227-2
Author: Barbara Nowak
Final Report • 2005-01-17 • 1.92 MB
2001-245-DLD.pdf

Summary

Amoebic Gill Disease (AGD) is the main health problem affecting salmon industry in Southern Tasmania.  To improve management of fish with AGD on the farms, the industry needs better understanding of AGD epidemiology.  This will provide a basis on which to develop strategies for new treatment or vaccine application in the future.

We have identified reservoirs of the amoeba causing AGD in Atlantic salmon in Tasmania.  The amoebae were widespread and easily isolated from marine and estuarine sediments and cage netting.  There was no apparent relationship between the presence of the amoebae in the environment and AGD prevalence in the cages.  Development of methods to isolate amoebae from water samples and to accurately quantify the amoebae is needed if the relationship between the amoebae in the environment and AGD outbreaks is to be fully understood. However, computer simulations suggested that once fish in a cage are infected with AGD, they become the main source of amoebae and other reservoirs become insignificant.

This project provided specialised training in introductory and advanced epidemiology, sampling design, design of field trials and data analysis to all stakeholders, including researchers, government veterinarians and industry. Potential for AGD data sharing and analysis for the whole industry was discussed. A trial AGD database was set up, however industry showed no interest in using it. A computer model was developed based on data from one farm collected during 2003.  While the simulations provided interesting insights and identified knowledge gaps, the model could not be validated using data from the same farm from 2002, proving that it has serious limitations.   Increased understanding of the disease outbreaks dynamics is needed before a predictive model of AGD can be developed.

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