Atlantic Salmon Conservation and Farming Impacts

Wild Atlantic salmon populations are severely depleted; farmed salmon operations contribute to wild population decline through sea lice transmission and genetic introgression from escapes.

Key Facts

Atlantic salmon are classified as vulnerable by the IUCN with populations in many rivers at historic lows
Sea lice from salmon farms transmit to wild smolts passing farms on their downstream migration
Farm escapes interbreed with wild salmon, reducing local adaptation that supports population survival
Some Norwegian rivers have lost wild salmon populations that were present for centuries
International conservation agreements are attempting to reduce farming impacts on wild populations

Welfare Considerations

The welfare and conservation interests of wild Atlantic salmon are directly harmed by open-net salmon farming operations. Sea lice originating from farm aggregations infest wild smolts at levels that reduce their survival to the sea and their subsequent return to rivers. Escaped farm salmon carry genetic diversity that reduces the local adaptation of wild populations to their specific river conditions. Individual wild smolts navigating past salmon farms face a gauntlet of external parasites that cause skin damage and physiological stress. The solution — closed-containment aquaculture that eliminates the interface between farmed and wild fish — exists but requires investment that industry has been slow to make.

What You Can Do

Support closed-containment salmon aquaculture development through policy advocacy
Choose salmon from farms demonstrating low sea lice counts and escape records
Donate to Atlantic salmon conservation organisations working on population recovery
Advocate for regulatory requirements for closed-containment in sensitive river systems
Raise awareness about the connection between salmon farming practices and wild salmon welfare