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Author Topic: Warning not to eat marron from Grimwade Large Dam  (Read 1858 times)

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Warning not to eat marron from Grimwade Large Dam
« on: February 15, 2015, 09:53:25 PM »
Warning not to eat marron from Grimwade Large Dam
Thursday 29 January 2015 - WA Fisheries

​The Department of Fisheries is advising fishers not to catch or consume marron from Grimwade Large Dam, north east of Balingup.

Principal Fish Health Research Scientist, Dr Cecile Dang said flesh from marron caught recently in the large dam has been found to have high numbers of cysts. Marron from Grimwade Small Dam did not have cysts.


Marron flesh showing the cysts containing an unidentified worm species

“The flesh from several marron samples was examined at the department’s Fish Health laboratories yesterday and the cysts appear to be a life stage of an unidentified worm,” Dr Dang said.

“We are attempting to definitively identify the worm species found in the cysts, but that process may take a few weeks and in the meantime we warn fishers not to take or eat any of the marron from the Grimwade Large Dam.”

“Further, we would ask fishers in other areas of the Blackwood catchment area to carefully check their marron catches to ensure the flesh does not contain cysts or are infested in any way by this worm parasite.”
 
The recreational marron fishing season in Western Australia’s South West is due to end at noon on Thursday February 5 and no marron should be taken from any of State’s public waterways after that time.

Dr Dang said at this point the issue appeared to be contained to Grimwade Large Dam, but fishers should carefully examine all marron they capture during the rest of the season.

“As an extra precaution, we also ask anyone who has fished at the Grimwade dams not to use the same fishing gear in another waterway, until the worm can be identified and further advice can be provided,” she said.

“If a worm is found in marron flesh, we recommend that it not be eaten and for the Department of Fisheries to be alerted by calling FishWatch on 1800 815 507.”

FishWatch is a 24/7 reporting line that provides a quick and easy way to report evidence of aquatic diseases (including fish kills), sightings of aquatic pests and suspected illegal fishing activity.

The Department of Fisheries will continue with the process to identify the worm affecting marron in Grimwade Large Dam and also carry out further checks in South West waterways.

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Expert identifies likely marron worm, pending confirmation
« Reply #1 on: February 15, 2015, 10:00:22 PM »
Expert identifies likely marron worm, pending confirmation
Friday 30 January 2015 - WA Fisheries

​The Department of Fisheries has received scientific advice to provide preliminary identification of the worm found in cysts on the flesh of marron caught at Grimwade Large Dam, north east of the South West town of Balingup.

Principal Fish Health Research Scientist, Dr. Cecile Dang said that, upon initial examination, a parasitology expert had identified the worm as being part of the large group of worms called trematodes.

“The specific species of worm that is present in the marron sourced from Grimwade Large Dam is still to be confirmed and further assessment is underway,” Dr Dang said.

“These trematodes worms are common in Australia and in Western Australia, but they have not been detected in WA marron before.

“While these worms are not known to cause any human health problems, we encourage people to continue to exercise caution and not eat any marron with cysts until a positive identification is made.”

Dr Dang said this group of worms have complex life cycles that involve multiple specific hosts, sometimes including crayfish and turtles.
 
“It is quite possible that these worms are part of the ecosystem in WA freshwater bodies and, if so, are unlikely to be of ongoing concern,” she said.

“Until further information is available, we are encouraging recreational fishers not to move live marron between water bodies.

“In addition, fishers should adopt the good practice of inspecting their catches to ensure their catch is healthy as well as checking and cleaning their gear between using it in different fishing locations.

“If a worm is found in marron flesh in South West waterways, we urge fishers to alert the Department of Fisheries by calling FishWatch on 1800 815 507.”

FishWatch is a 24/7 reporting line that provides a quick and easy way to report evidence of aquatic diseases, fish kills, sightings of aquatic pests and suspected illegal fishing activity.
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