Recirc in Action: Welfare implications of side-swimming rainbow trout
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Editor's Note 
 
With water quality and supply becoming more uncertain, more hatcheries are looking seriously at RAS and PRAS as the future of operational resilience. Since RASTECH25 in June, I've been consulting with experts about new ideas for you. Stay tuned!
- Jean Ko Din, Editor
 
THIS WEEK 
 

RAS-raised Atlantic salmon smolts are smaller but grow quickly as post-smolts: study

Atlantic salmon smolts raised in freshwater recirculating aquaculture systems (RAS) were smaller than those raised in freshwater net pen lochs, but grew faster as post-smolts when both groups were transferred to a saltwater cage site, said a recent study from the University of Stirling.


Marine heatwaves are dramatically affecting ocean life: study

New research from the University of Victoria (UVic) in B.C. shows how heatwaves can have a major impact on marine ecosystems. Researchers reviewed 331 studies and reports from the 2014 to 2016 North American Pacific coast heatwave, and compiled a comprehensive overview of its ecological impacts.


 
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Recirc in Action: Welfare implications of side-swimming rainbow trout

In intensive rainbow trout culture, side-swimmers – fish that swim in a coordinated manner, but with orientation altered so that they appear to be swimming on their sides – are a relatively common observation. Rainbow trout appear to be particularly affected. » Read More...
 
 
Water Quality 
 

Working with water quality

The resiliency of cleaner fish, lumpfish, extends to surviving regardless of changes in water quality, such as fluctuations in temperature, salinity, or ammonia levels. In this article, we examine how water quality can affect fish welfare and how risks can be mitigated. » Read More...

Keeping watch on the water source

Water treatment systems for hatcheries must be designed to provide consistent water quality year-round, despite wide seasonal variations. » Read More

 
MORE HEADLINES 
 

Tasmanian Greens hope to convert hatcheries to RAS

» Read More...

Florida Atlantic U and Bahamas partner to restore conch populations

» Read More...

Ecuador wants to lead in measuring living wage on shrimp farms

» Read More...

Scientists make healthy salmon feed from carbon dioxide-eating algae

» Read More...

 
Events 
 

Aqua Nor    

Aug. 19-21, 2025
Trondheim, Norway
» Read More...

Global Shrimp Forum 2025

Sept. 2-4, 2025
Utrecht, the Netherlands
» Read More...