Aquaculture for all
The Fish Site presents: The Vienna Sessions - Conversations about aquaculture. 9 video interviews with aquaculture thought leaders. Watch here.

Rare Fish Disease Found in Macquarie Harbour Farmed Salmon

Salmonids Health Husbandry +4 more

AUSTRALIA - A rare chronic disease called mycobacteriosis that can cause mortality in fish, has been found in farmed salmon in Macquarie Harbour, on Tasmania's west coast.

Lucy Towers thumbnail

A Department of Primary Industries internal discussion paper, obtained by ABC Rural through Right to Information laws, reveals that an increased rate of the disease was recorded last year.

The paper links the disease to a degraded environment and warns Macquarie Harbour's low oxygen levels and complex marine environment increases the risk of disease spread among salmon.

Senior Lecturer in veterinary pathology at the University of Adelaide, Dr Stephen Pyecroft, said a degraded environment would worsen the incidence of the disease.

"You get an increased number of those bacteria if you have low dissolved oxygens, high levels of detritus, and you get into what we call an eutrophic environment (high amount of nutrients from fish waste)," he said.

"[A degraded environment] would promote the presence of mycobacteria, [with] any degrading in the environment you're going to predispose animals to infection."

Further Reading

You can view the full story by clicking here.