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.