Genetic diversity in salmon has declined since fish farming introduced – study

Genetic diversity in salmon has declined since fish farming introduced – study

Researchers say loss of diversity in Sweden’s Atlantic salmon population could compromise ability of fish to adapt to climate change

Fish farming may have been devised as a remedy to reinvigorate dwindling fish stocks but this human solution has spawned another problem: lower genetic diversity.

Now, a study shows that the genetic makeup of Atlantic salmon populations from a century ago compared with the current stock across 13 Swedish rivers is more genetically similar than distinct, which researchers say could compromise the ability of the fish to adapt to climate change.

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