Optimising mulloway farming through better feed and hatchery practices

Summary

The overall aim of this project is to significantly reduce the cost of production for northern NSW mulloway farmers through improved feed management and onfarm seed supply. This project extends previous NMSC research (RIRDC Project PRJ002273 “ Reinvigorating NSW prawn farms through the culture of mulloway”) which has demonstrated the feasibility of farming mulloway in prawn ponds. It seeks to reduce the major input cost (feed) associated with farming this species (greater than 50% of total operating costs). Current diets and feeding strategies for large mulloway are not optimal. Food conversion ratios are well above the industry standard for marine fish and result in direct economic losses through food wastage and poor growth. To improve profitability, optimal feeding rates need to be determined and then verified at our industry partners farm (PIM Pty. Ltd.). Reliable supplies of cheap, high quality fingerlings are also essential for developing a viable industry. At present, fingerling costs represent in excess of 15% of total operating costs with few suppliers and little competition. One option, to reduce cost and achieve reliability, is to adapt existing onsite prawn hatchery facilities to finfish production, as many of the requirements of prawn and fish hatcheries are similar. This, in conjunction with appropriate staff training, would represent a solution to present seed stock supply issues. Together these represent the two major areas where improvements in production technology can increase profitability, sustainability and viability of farms while also providing a basis for significant expansion of the industry.

Program

New and Emerging Animal Industries

Research Organisation

Southern Cross University

Objective Summary

The major objectives of this project are: I. To improve growout feed management practices for mulloway over the production size range of 0.5 to 2 kg. II. To improve mulloway fingerling production by adapting existing prawn hatchery facilities for marine finfish production. The expected outcomes of the project are: * Feeding rates documented for large mulloway (0.5, 1 & 1.5 kg). * Best feed cost practices determined for large mulloway that minimise wastage and pollution. * Feeding strategy extended to industry and tested under commercial conditions. * Existing prawn hatchery infrastructure evaluated for production of marine fish. * Onsite expertise in marine fish hatchery production developed using the greenwater larval rearing technique. * Improved profitability for producers making them more competitive in regional and international markets.

Project Code

PRJ-005806

Project Stage

Closed

Project Start Date

Friday, June 24, 2011

Project Completion Date

Wednesday, December 31, 2014

Journal Articles From Project

Not Available

National Priority

Frontier technologies for building and transforming Australian industries

National Priority

Adoption of R&D

National Priority

NAP-Enhance industry success through targeted industry-specific RD&E

Contact

Related publications

06.01.15

Optimising Mulloway Farming Through Better Feed and Hatchery Practices