Sweetwater Fishing Forums
General Category => News Views & Press Releases => Topic started by: Editor on June 09, 2012, 05:47:09 PM
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Native fish faced with red spot disease in the Murray‐Darling
Epizootic ulcerative syndrome (EUS), also known as red spot disease, is a fish disease of international significance. In June 2010, several species of native fish, including Bony Herring, Golden Perch and Murray Cod, were found between Bourke and Brewarrina, NSW, with severe ulcers.
Tests showed that the fish had been exposed to the pathogen that causes EUS. EUS is a very invasive disease and when it
first occurs in an area many fish die within a very short time.
Outbreaks of infectious diseases in fishes are closely linked to environmental conditions, particularly temperature and water
quality.
Temperature is a critical factor determining the severity of EUS outbreaks and most deaths occur when water temperatures are relatively low.
This research suggests that high flows and low temperatures may have contributed to this outbreak.
Read more about this research by Boys and others in PLoS ONE:
http://dx.doi.org/10.1371/journal.pone.0035568 (http://dx.doi.org/10.1371/journal.pone.0035568) [OPEN ACCESS]
Photo: NSW DPI
Golden Perch showing the ulcers characteristic of red spot disease. More information about EUS is available from:
www.dpi.nsw.gov.au/fisheries/pestsdiseases/animal-health/wildfishshellfish#Diseases-in-Wild-Fish (http://www.dpi.nsw.gov.au/fisheries/pestsdiseases/animal-health/wildfishshellfish#Diseases-in-Wild-Fish)
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WE will continue to have problems in the Murray Darling as long as the cotton paddocks continue to allow the run off of chemicals into the streams of the MD system. Couple that with the amount of water they take from the rivers and it's a wonder we have any river at all! This problem is far greater than the problems we have over on the coast with bankside degradation due to unfenced cattle.
JD