An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

An immunofluorescent staining technique for the rapid detection of the ciliate protozoan Uronema sp. was developed during 1995 and 1996. The initial test was developed using seven cultures of Uronema sp. from various sources which were identified as Uronema nigricans  by microscopical and histochemical techniques. These seven strains were maintained in a medium containing bacteria as their food source. Antisera against two of the strains were raised in rabbits and against one in sheep. These were then adsorbed with the bacteria and unrelated ciliates to eliminate cross-reactivity.

More recently, an axenic (bacteria-free) culture of Uronema sp. has been accomplished and high-titre antisera raised in rabbits for use in the immunofluorescent staining technique.

Arrangements have been made to have a monoclonal antibody to the axenic Uronema prepared at the Atlantic Veterinary College, University of Prince Edward Island in Canada. This will then provide a reliable supply of highly specific antibody for future research in this area.

The substantial southern bluefin tuna mortality event in 1996 impacted on the delivery of the project objectives, particularly those associated with the application of the immuno-staining technique developed to:

• screen potential sources of infection associated with farming tuna; and based on this
• provide advice to farmers on how to improve farm management techniques so as to minimise infections.

Keywords: Uronema, aquaculture, southern bluefin tuna.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.

The snapper (Pagrus auratus) fishery in South Australia is currently managed as one stock, although recent changes to the regional management of the recreational fishery have been based in part on an assumption of a multi-stock population structure.  Tagging and genetic studies in other States have shown that different stocks do occur over relatively small geographical areas.  This prompted an interest in identifying the existence or otherwise of separate stocks in South Australian snapper.  An urgency to identify the appropriate spatial management units for this species has been prompted by the decline of the commercial catch to its lowest levels since 1968.

Studies of genetic variation in the proteins and DNA of snapper were carried out at the South Australian Museum to determine the presence of genetically isolated breeding stocks. Fish from each of the three commercially fished areas within the state and from Victoria and Western Australia were sampled over a 5 year period with assistance from commercial and recreational fishers.

The present genetic study provided no evidence of the existence of more than one stock in the commercially fished waters in S.A. and  south-western W.A.  This is consistent with tagging studies carried out in South Australia over the past 19 years.  In contrast, both genetic and tagging studies have shown that fish from Port Phillip Bay, Victoria represent a different stock which extends into the south-east of S.A.
The significance of these results is that the snapper fishery in S.A. should be managed as a single genetic stock. Ultimately, final management of the fishery will incorporate other scientific and economic parameters, but will have a stronger biological basis because of the availability of these genetic data.