Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans, in salmon sea-cages
Daniel W Wright, Barbara Nowak, Frode Oppedal, Andrew Bridle, Tim Dempster
AQUACULTURE ENVIRONMENT INTERACTIONS | INTER-RESEARCH | Published : 2015
Identifying where and when parasites occur in farming environments is vital to understand transmission dynamics and develop preventative measures that reduce host-parasite encounters. A major parasite concern for Atlantic salmon farming is Neoparamoeba perurans, a marine amoeba that causes the potentially fatal amoebic gill disease (AGD), for which few control options exist. We explored whether free-living N. perurans abundance differs among depths in commercial Atlantic salmon Salmo salar sea-cages. Water samples collected from the surface to 10 m depth at multiple cage sites and times, and subsequently subjected to qPCR analysis, revealed that N. perurans abundance was influenced by depth ..View full abstract
We thank Francisca Samsing and Fletcher Warren-Myers for assistance in the field, and Carlos Zarza and Linda Sams from Tassal and Steve Percival from Huon Aquaculture for assistance. Luke Barrett advised on statistical analyses. Funding was provided by an Australian Research Council Future Fellowship grant to T.D.