Yellow polypropylene rope is used in long line oyster culture as shown above. Download the latest report to farmers for aquaculture industry statistics and production data.A mother oyster shell with attached oyster spat.The oyster industry management plan for Moreton Bay Marine Park supports the sustainable development of the commercial oyster industry in Moreton Bay.You will need to discuss technical and licensing aspects of any proposed aquaculture venture with staff from Fisheries Queensland and the Department of Environment and Science before proceeding with site selection, design and, where applicable, land purchase. Find out how to prevent, identify and manage disease in aquaculture farms.This policy provides information on Fisheries Queensland's requirements under the Fisheries Act 1994 and seeks to apply the principles of ecologically sustainable development. Find out about management strategies in our policy for maximising rock oyster production. You can maximise rock oyster production by assessing the use and efficiency of your oyster areas. However, as they are not pre-stressed to being out of the water, as with other methods, their shells tend to be thinner and care must be taken post-harvest to ensure the shells are not damaged, and the oysters remain alive and in sound condition. Various furniture may be used to accommodate the oysters, including trays suspended on buoys or pyramid-like structures with horizontal trays.Īn advantage of this system is that the oysters are able to feed uninterrupted. Oysters are suspended in the water and remain below the water at all times. Rack and basket system: single seedīags of PVC mesh with two sticks running lengthwise through either end are suspended between a rack structure. Bags of any size can be made up to suit, depending on the size and quantity of oysters farmers wish to place in them. Bags can be removed or attached using stainless steel or plastic clips. You can quickly change the position of the line by adjusting the height of the intermediate posts. From this line, a series of PVC mesh bags are suspended with clips. BST adjustable longline: single seedĪ line is tensioned between two anchoring posts with intermediate posts to keep it above the bottom. This maximises the water flow to each oyster in the tray and reduces the likelihood of the oyster being flipped over.Īs with the stick method, overspatting should be avoided by placing the trays in the water column above or below the optimum settlement region for spat. The tray is designed so that the height of the frame is equivalent to the height of one oyster only. The tops of the trays are usually covered with a wire mesh or netting, which you can remove to inspect the stock. The mesh size is determined by the size of the oyster. Tray culture uses wood, aluminium or plastic frames with bases of galvanised wire or plastic mesh. This can be determined by simple experimentation. To avoid young oysters attaching to the crop (overspatting), you should place the sticks in the water column above or below the optimum levels for spat settlement. Moving the oysters from the sticks to an alternative method has advantages, as the oysters tend to reach a larger and more regular size. Sticks are spaced 15–20cm apart and then fixed to the racks.Ī disadvantage with this system is that if the oysters are not thinned out they will grow in clumps and produce smaller and irregular-shaped oysters. The sticks used for spat collection are separated and laid out more extensively onto the racks. This method involves keeping the sticks used for spat collection, removing excessive spat and leaving the remaining oysters to mature.
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