SOUND SCIENCE
Some functional feeds may have trade-offs for salmon health — new study
There is a complex balance between the benefits and drawbacks of functional feeds for Atlantic salmon when fish are facing concurrent health threats, a Canadian study suggests.
One pathogen strain seems the main culprit in damaging salmonid disease
A distinct strain of the main fungus-like pathogen which causes saprolegniosis — thought to be responsible for around 10% of economic losses in the salmonid industry — looks likely to be responsible for the majority of outbreaks of the disease on Atlantic salmon fish farms.
Fishmeal substitute made from zooplankton could boost tilapia growth and health
A feed made from the zooplankton daphnia boosted growth rates of red tilapia fry when used as a partial replacement for fishmeal, but too much daphnia had the opposite effect.
Mollusk farms must prepare for more disease under climate change
Warmer seawater is creating perfect conditions for many mollusk pathogens to thrive, scientists have warned.
Research highlights risks of thermal delousing treatments for unhealthy salmon
Thermal sea lice treatments do not appear to cause increases in pathogens which threaten farmed salmon, but the risk of stress-related mortalities means that fish already suffering from disease should not undergo thermal sea lice treatments, according to Institute of Aquaculture researchers.
Yeast could aid shift away from fish-based diets in rainbow trout aquaculture
Torula yeast could be a promising option for inclusion in non-fishmeal feeds, with scientists finding links to production and immune improvements in a study using rainbow trout.
Advanced genomics data could spark breeding revolution in European aquaculture
New genomics data on six commercially important fish species in Europe could have major implications for breeding programs, but there is work still to be done to realize the benefits.
How acoustic technologies are aiding fish health and welfare
Monitoring fish using sound is on the rise in aquaculture, meeting a need to accurately assess the health and welfare of farmed-fish populations in changing environments.
Reanalysis shows true identity of bacteria involved in lactococcosis cases
The bacterium Lactococcus petauri has played a more significant role in historical cases of the disease lactococcosis than was previously thought, new research suggests.
Understanding plankton threats to salmon requires a mix of old and new technologies
Using both “traditional” microscopy and environmental DNA (eDNA) analysis can help paint a complete picture of plankton threats to salmon aquaculture, according to University of Glasgow research.
