PROJECT NUMBER
•
1994-025
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
41 results
PROJECT NUMBER
•
1980-013
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
TAGS
Mortality, growth and movements of the western rock lobster, Panulirus cygnus
Project number:
1995-020
Project Status:
Completed
Budget expenditure:
$73,021.00
Principal Investigator:
Chris F. Chubb
Organisation:
Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date:
12 Jul 1995
-
30 Jun 1999
Contact:
FRDC
1. To prepare a report to industry on the migratory movements of lobsters tagged in recent programmes.
2. To estimate regional growth and mortality rates using existing data from recent programmes to assist in the experimental design of future tagging programmes.
3. To undertake tagging of juveniles in the shallower waters of the Limited Entry Western Rock Lobster Fishery to provide to gain preliminary estimates of exploitation and growth rates and the directions and magnitude of movements.
4. To attempt to recruit and train fishing industry representatives in the procedures of data collection from recaptured tagged lobsters to improve the level of reporting by industry.
5. Preparation of a longer term strategy for providing annual exploitation rates, growth and movements of western rock lobster throughout the Limited Entry Fishery.
Final report
ISBN:
0-7309-1936-6
Author:
Chris Chubb
Final Report
•
1999-07-01
•
1.53 MB
1995-020-DLD.pdf
The very high levels of exploitation in the western rock lobster fishery have resulted in the introduction of regional or zone-specific management arrangements in recent years. This is a permanent departure from an holistic approach to the fishery’s regulation. A detailed knowledge of regional variations in the growth, movement and mortality of the lobsters is required to support the models assessing regional management options.
A need was identified to supplement the Fisheries Western Australia, Research Division’s resources to enable the full analysis of existing tagging data in terms of growth, movements and mortality; to undertake tagging in shallow water to assist in addressing specific management issues; to improve the level of tag recapture information from industry; and to develop a strategic approach to tagging that would assist in providing appropriate advice to management and industry, given the regional approach to the fishery’s regulation.
Tagging of western rock lobsters, using “spaghetti” tags in a dorsal or ventral (or both) position, has been undertaken opportunistically for many years but this report is concerned with data collected from 1988 to 1996. Most recaptures of tagged lobsters were made during the first commercial season after release (approximately 75%), however, recaptures did occur for up to five seasons post-release.
Keywords: Western rock lobster, Panulirus cygnus, tagging, migration, growth, mortality.
PROJECT NUMBER
•
1977-021
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
PROJECT NUMBER
•
2000-135
PROJECT STATUS:
COMPLETED
Regrowth of pilchard (Sardinops sagax) stocks off southern WA following the mass mortality event of 1998/1999
This project produced time series of estimates of spawning biomass for pilchards in four purse seine management zones in Western Australia, three on the south coast and one on the west coast. The pilchard stocks in Western Australia have recovered strongly since the 1998/99 mass mortality.
This...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES
PROJECT NUMBER
•
1998-302
PROJECT STATUS:
COMPLETED
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES
Developing on-growing techniques and disease prevention husbandry of pearl oysters in WA
Project number:
1987-081
Project Status:
Completed
Budget expenditure:
$0.00
Principal Investigator:
Lindsay Joll
Organisation:
Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date:
28 Dec 1991
-
31 Dec 1991
Contact:
FRDC
1. Improve existing methods for on-growing pearl oyster spat to a size suitable for pearl cultivation
2. Develop husbandry protocol for preventing and containing an outbreak of oyster mortality on a farm
Final report
Author:
Lindsay Joll
Final Report
•
1.08 MB
1987-081-DLD.pdf
Infection by marine Vlbrlo bacteria is still considered to be
the major opportunistic cause of mass mortalities of pearl
oysters (Pinctada maxima} on farm lease sites in the north
west of Western Australia. Vibriosis of P. maxima was found
to occur following some form of stressful husbandry practice
as similar mortality outbreaks were never apparent in natural
populations of pearl oysters throughout this investigation.
Potentially harmful Vlbrlo species were found to be associated
with pearl oysters in the Broome region throughout the year;
therefore vibriosis could occur at any time to oysters
subjected to excessive stress.
the major opportunistic cause of mass mortalities of pearl
oysters (Pinctada maxima} on farm lease sites in the north
west of Western Australia. Vibriosis of P. maxima was found
to occur following some form of stressful husbandry practice
as similar mortality outbreaks were never apparent in natural
populations of pearl oysters throughout this investigation.
Potentially harmful Vlbrlo species were found to be associated
with pearl oysters in the Broome region throughout the year;
therefore vibriosis could occur at any time to oysters
subjected to excessive stress.
PROJECT NUMBER
•
1998-153
PROJECT STATUS:
COMPLETED
Mother-of-pearl (Pinctada maxima) shell: stock evaluation for management and future harvesting in Western Australia
The West Australian Pearling industry is one of Australia’s most valuable aquaculture industries, currently generating around $120 - $160 million annually. The majority of pearl shell used to culture pearls come from the pearling beds in the inshore waters near Broome. The fishery for...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES
PROJECT NUMBER
•
2000-138
PROJECT STATUS:
COMPLETED
Minimising the cost of future stock monitoring, and assessment of the potential for increased yields from the oceanic snapper, Pagrus auratus, stock off Shark Bay
The investment in this project has resulted in a substantially more extensive set of age composition data than would have otherwise been possible. This in turn has underpinned stock assessment modeling that has provided the basis for determining that the commercial fishery for snapper in Shark...
ORGANISATION:
Department of Primary Industries and Regional Development (DPIRD) WA
SPECIES
Biomass and sustainable yield assessment of the outer-shelf fishery resources off the Pilbara coast of tropical Western Australia.
Project number:
1997-138
Project Status:
Completed
Budget expenditure:
$311,786.00
Principal Investigator:
Michael Moran
Organisation:
Department of Primary Industries and Regional Development (DPIRD) WA
Project start/end date:
22 Jun 1997
-
25 Oct 2000
Contact:
FRDC
Managers need to be provided with information that will ensure that fishing mortalities remain below the appropriate biological reference points for the key species.
To provide this information, knowledge is required of the relationship between fishing effort and fishing mortality. An experimental approach which provides a clearly measurable level of fishing mortality will achieve this. The fish in the 100-200m depth zone are schooling species and commercial effort will naturally be targeted on schools, so commercial catch rates cannot be used for the abundance measures required to calculate fishing mortality. There is a need therefore for survey fishing before and after the period of intense commercial fishing and for research personnel to oversee the survey fishing, gather samples and information on the survey cruises, process these at the laboratory and analyse the results. Monitoring of the fishing effort through research logbooks during the commercial fishing period is also required.
1. To determine the relationship between fishing effort and fishing mortality for the key outer-shelf demersal scalefish species (principally Pristipomoides multidens) in the Pilbara fishery.
2. To document the distribution and abundance of adults and juveniles of major finfish species in the 100 to 200m depth zone off the Pilbara coast.
3. To provide industry and management with a range of options for sustainable exploitation of the deeper water fish resources of the Pilbara.
Final report
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