Antioxidants in salmon’s diet give the fish their distinctive colour, but internet rumours proliferate about how farmed salmon achieve the same colour.
The industry says the deterrent is necessary, but evidence suggests the devices pose a significant threat to some marine life, including maiming and killing seals.
Kevin Berry, University of Alaska Anchorage and Brett Watson, University of Alaska Anchorage
The harvesters of the historic wild salmon run out of Bristol Bay, Alaska, were already facing tough competition from relatively cheap and plentiful farmed salmon. Then came the pandemic.