collect wild oyster spat crassotrea gigas

In this method, 6–8 sticks are nailed to cross-beams to form frames that are then grouped to form batches. Stick placement is one of a variety of proven methods used for collecting spat. The artificial substrate must be attractive to the larvae to encourage them to settle and attach. The influences of tide, wind and currents must be considered before placing spat collection devices. developing a suitable substrate for the spat to settle on.deciding on an area in which to collect (this must be an area where spat are known to be present in the water).Collecting spatĬrucial considerations for spat collection include: This introduced species competes with rock oysters for food and space. Restrictions are in place to prevent importing the Pacific oyster ( Crassostrea gigas) into Queensland. Selection of spat has become an important issue for Queensland growers, as they need to source supplies of stock that are both economical and contaminant-free. Many growers ask to see a sample of the stock before they buy. Some spat is still collected, but the amount is small compared to the spat sourced from New South Wales.īecause an oyster is considered spat up to the age of 12 months, size can vary considerably. Queensland oyster farmers have, for some time, relied on importing spat from New South Wales for on-growing into Queensland waters. The successive steps of growing and maturing depend on the quantity and quality of the spat.

The first step in oyster aquaculture is finding a good source of spat (oyster larvae).

Collect wild oyster spat crassotrea gigas