10 results
Environment
Environment

Rock Lobster Enhancement and Aquaculture Subprogram: propagation techniques

Project number: 1999-315
Project Status:
Completed
Budget expenditure: $149,889.00
Principal Investigator: Piers Hart
Organisation: University of Tasmania (UTAS)
Project start/end date: 5 Sep 1999 - 12 Jun 2002
:

Need

Expansion of output from the rock lobster fishery cannot be achieved using traditional fishing methods as most wild stocks are already fully exploited. It is therefore necessary to develop an aquaculture technique that can increase the long term production of rock lobster, in a sustainable manner.

The outcomes of the FRDC workshop (project 98/300) and an earlier Perth workshop sponsored by the DISR, confirmed that culture of puerulus from eggs is biologically feasible and also appears economically viable. Production of puerulus from eggs has been achieved on a small scale in both Japan and NZ. The Japanese are far enough advanced to be considering release of cultured puerulus onto artificial reefs in the next few years. In Tasmania the phyllosoma of the southern rock lobster have been reared through 70% of the larval cycle with good survival (25%).

The priorities for further research were identified as:
· improving larval survival & growth
· improving system design/environmental requirements
· improving nutrition
· reducing the length of the larval phase.

Lower priorities were identified as:
· out of season spawning
· improving gamete quality.

However, as gametes are readily available from wild-caught broodstock, it was considered that these issues could be left for a future project.

The next stage must be to coordinate and expand the research in Australia under one project through the FRDC and CRC, in order to focus our effort on addressing the research priorities that were identified during the workshop.

This project identifies the priorities for the first year of the project and addresses a few issues that need to be determined in order to design a longer term project.

Objectives

1. Develop an artificial diet acceptable to phyllosoma of three species of rock lobster, that is water stable and easily manipulated.· Project 1. Characterise morphology and function of larval digestive system (Method 1).· Project 2. Examine biochemical changes in cultured and wild phyllosoma (Method 2).· Project 3. Develop a best guess formulated diet for use in nutritional experiments (Method 3).· Project 4. Examine the suitability of diets for phyllosoma of rock lobster (Method 4).
2. Examine mass culture systems and determine environmental requirements for phyllosoma of three species of rock lobster.· Project 5. Examine mass culture systems using southern rock lobster phyllosoma (Method 5).· Project 6. Examine environmental requirements of southern rock lobster phyllosoma (Method 6).· Project 7. Examine environmental requirements of tropical rock lobster phyllosoma (Method 7).· Project 8. Examine the effects of temperature and food density on phyllosoma of western rock lobster phyllosoma (Method 8).
3. Develop hormonal control of moulting in rock lobsters.· Project 9. Scoping study to examine the hormonal sequence controlling moulting in phyllosoma of a test species (Method 9).
4. Determine the health status of phyllosoma of southern rock lobster under culture conditions.· Project 10. Monitoring health of southern rock lobster phyllosoma (Method 10).
Industry
PROJECT NUMBER • 2016-235
PROJECT STATUS:
COMPLETED

Improving post-harvest survival of live held Southern Rock Lobster

This report details the results of a multifaceted research program led by the Institute for Marine & Antarctic Studies, University of Tasmania in collaboration with the School of Animal and Veterinary Sciences, The University of Adelaide. The work was undertaken to better evaluate post-harvest...
ORGANISATION:
University of Tasmania (UTAS)
Industry
PROJECT NUMBER • 2011-744
PROJECT STATUS:
COMPLETED

Seafood CRC: commercialising translocation of southern rock lobster

Another Seafood CRC project (2006/220) demonstrated that translocation was successful in changing the colour, growth rate and nutritional value of Southern Rocklobster. Based on these results, the Tasmanian rock lobster industry was overwhelmingly supportive of a commercial scale trial. While the...
ORGANISATION:
University of Tasmania (UTAS)
Industry
PROJECT NUMBER • 2000-252
PROJECT STATUS:
COMPLETED

Rock Lobster Post Harvest Subprogram: optimising water quality in rock lobster post-harvest processes

Rock lobsters can be exposed to poor water quality during all stages of handling and holding prior to going to market. Poor water quality reduces the time a lobster can be held alive and how many animals can be held in a system and thus may reduce profit. The quality of water can be assessed using...
ORGANISATION:
University of Tasmania (UTAS)
Environment