Before any measurements were made, the trays were washed clean of mud using a high-pressure water spray, and visible overcatch
and fouling organisms were removed from oysters.
The Ministry of Fisheries also allocated a total of 1550 tonnes of hake to none quota holders and an overcatch
of 2000 tonnes due to investment.
Before 1984/85, farmers in Port Stephens caught Sydney rock oyster spat near the mouth of their estuary and grew their oysters relatively free of overcatch (spat setting on oysters and growing equipment) in the upper half of the estuary.
The proliferation of Pacific oysters in Port Stephens has greatly increased the overcatch of spat and thus the costs of handling Sydney rock oysters.
Pacific oysters in Port Stephens spawn several months earlier than SRO (October November) and significant "overcatch
" (oyster settlement) can result, which leads to the need for additional expensive handling of oysters (Pacific and SRO) to kill this additional settlement.
2004) make them attractive in areas such as Port Stephens, New South Wales (NSW), Australia, where excessive overcatch
makes oyster farming difficult (Nell, 1993).