Introgression of non-native mitochondrial haplotypes from farmed to wild Atlantic salmon

Farmed salmon escape and interbreed with wild Atlantic salmon on a large scale. We studied introgression of mitochondrial haplotypes from farmed Atlantic salmon originating from the Eastern Atlantic phylogenetic group to wild salmon of the Barents-White Sea phylogenetic group. We find that farmed genetic introgression introduced novel, non-native haplotypes into the Barents-White Sea phylogenetic group. The mitochondrial genome has important functional effects and is inherited as a haploid from the mother. Hence, the observed introgression across natural genetic barriers is expected to cause long-lasting functional maladaptation of the hybrids in the maternal line. As the use of farmed Atlantic salmon from non-native phylogenetic groups is widespread in aquaculture, the impact on wild Atlantic salmon may be more severe than previously recognized. Our results highlight the ecological risks of releasing non-native wild and domesticated animals., , , Data from: Introgression of non-native mitochondrial haplotypes from farmed to wild Atlantic salmon

Haplotypes.csv

Mitochondrial haplotypes for wild and farmed Atlantic salmon used to analyse the introgression of non-native mitochondrial haplotypes from farmed to wild Atlantic salmon in Northern Norway.

Columns:

Individual: individual id

year: year scale sample was collected

River_code: river id corresponding to table and map in supplementary material

Pwild: likelihood of an individual to belong to a wild versus a farmed reference

type: group of sample corresponding to analyses in the article

haplotype: mitochondrial haplotype, sequences can be found in supplementary material