Modifying Atlantic salmon behaviour with light or feed stimuli may improve parasite control techniques
Samantha Bui, Frode Oppedal, Oyvind J Korsoen, Tim Dempster
AQUACULTURE ENVIRONMENT INTERACTIONS | INTER-RESEARCH | Published : 2013
The aquaculture of Atlantic salmon Salmo salar faces severe health, environmental and economic concerns caused by the parasitic sea lice Lepeophtheirus salmonis and Caligus spp. An experimental delousing method exists whereby the surface jumping behaviours of salmon are combined with a floating, oil-infused chemical therapeutant, resulting in the fish dousing themselves passively. We tested whether a light stimulus or feed event, or a combination of both, during submergence (denial of surface access for the fish) increased the surface-oriented behaviours of salmon. Groups of 10 salmon were submerged in a sea-cage for 19 h and exposed to a light stimulus, feed event, or both. Control treatmen..View full abstract
We thank Jan Olav Fosse, Kristian Dale, Tone Vagseth, Jan-Erik Fosseidengen, and Kare Storsaeter for their technical support. Funding was provided by the Norwegian Research Council through the Centre for Research-Based Innovation in Aquaculture Technology (CREATE). The work was conducted in accordance with the laws and regulations of the Norwegian Regulation on Animal Experimentation 1996.