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Classification
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Saucer Scallop

Saucer Scallop

Latin names: Amusium balloti

Common Names: Scallop

Wild Caught - Australia

Saucer Scallop location

Region Caught:

  • WA Shark Bay Scallop Managed Fishery, Abrolhos Islands and Mid-West Trawl Managed Fishery, South West Trawl Managed Fishery, South Coast Trawl Fishery  (959t in 2016)

Saucer scallops are caught in a number of different trawl fisheries in WA, with the largest fishery operating in Shark Bay. Trawling may have some effect on the seafloor, but the impact is considered low as trawling mainly takes place over sandy sea floor that is naturally resilient to disturbance. Vulnerable habitats such as seagrass and fish nurseries are closed in order to protect them from the effects of trawling.

WA trawlers catch some threatened species, including seahorses and seasnakes, but in very low numbers that are unlikely to have population level impacts on these species. While the majority of fishing effort occurs in waters that are too cold for sea turtles, devices that allow turtles to escape are mandatory on boats where interactions could occur. However, there is no independent observer coverage in the WA-managed fisheries, and reported protected species interactions require verifying.

Marine parks provide significant protection for both marine habitat and protected wildlife in the largest saucer scallop fishery in Shark Bay, and state and commonwealth marine parks protect other areas close to saucer scallop fisheries.

Scallop populations are complex to assess, as scallop stocks are heavily influenced by factors such as water temperature. In WA, saucer scallop stocks were severely impacted by a three-year marine heatwave event that began in 2011, and the fishery has been in a rebuilding phase since then. Catches have recovered to pre-heatwave levels in some areas in 2018.

In WA, populations of saucer scallop are closely monitored, for example, independent surveys to determine scallop numbers are made at the beginning of the fishing season and areas are then opened if populations are adequate to support fishing activity. The fishing season is timed so that saucer scallops spawn before the fishing season, which helps protect stocks.

 

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Saucer Scallop classification

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