Marine aquaculture is very valuable to the South Australian economy and grows every year. Aquaculture products are consumed in Australian and overseas markets.
There are several hundred marine aquaculture licenses in South Australia.
The major growing species grown are:
- southern bluefin tuna
- yellowtail kingfish
Tuna generates the highest farm-gate sales in the State’s aquaculture industry. It accounts for more than half of the gross value of aquaculture production in recent years. Oysters and marine finfish are the next most valuable to the industry.
There are multiple production methods used in the marine sector, including:
- rack and rail
- longline systems
- benthic structures.
Production and value
Primary Industries and Regions SA collects data on production returns of marine aquaculture license holders. This is required by the Aquaculture Regulations 2016.
Annual economic impact reports are written using the data collected.
Southern bluefin tuna breeding
South Australian-based Clean Seas Tuna has been researching how to close the lifecycle of the southern bluefin tuna. The Arno Bay broodstock hatchery has been successful in getting broodstock to spawn and grow larvae. This has great potential to increase the value of the industry by making stock more available.
Integrated multi-trophic aquaculture (IMTA)
IMTA is a farming system where 2 or more species are farmed together and waste products of 1 species are recycled as feed for the other species. The recycled nutrients would otherwise be wasted. The IMTA system can increase profitability for the aquaculture industry by diversifying production.
This type of farming system also has potential to:
- reduce waste products in the marine environment
- decrease risk of algal blooms
- decrease cloudy water.
Contact the South Australian Aquaculture Council