Story at-a-glance

  • Piscine orthoreovirus (PRV) is a viral infection that likely spread to wild Pacific salmon from fish farms in the 1980s. It has caused substantial losses to the Norwegian farming industry, where it has been detected in 95% of farmed salmon
  • PRV may have contributed to the declining numbers and diversity of wild Pacific salmon, which have been dropping for 30 years. Pacific salmon body size is also substantially smaller than fish from before 1990
  • Farmed salmon are fed pellets made from highly polluted eel and fatty fish from the Baltic Sea and manufacturers add a pesticide to lengthen the shelf life
  • Wild-caught salmon is high in omega-3 fat, essential for good brain health and helps lower all-cause mortality. Seek out wild-caught Alaskan salmon with the Marine Stewardship Council (MSC) logo, indicating it came from a responsible fishery using sustainable practices


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