Extensive hybridization following a large escape of domesticated Atlantic salmon in the Northwest Atlantic

Wringe, Brendan F.; Jeffery, Nicholas W.; Stanley, Ryan R. E.; Hamilton, Lorraine C.; Anderson, Eric C.; Fleming, Ian A.; Grant, Carole; Dempson, J. Brian; Veinott, Geoff; Duffy, Steven J.; Bradbury, Ian R.

doi:10.1038/s42003-018-0112-9

i

Extensive hybridization following a large escape of domesticated Atlantic salmon in the Northwest Atlantic

2018
By Wringe, Brendan F. ; Jeffery, Nicholas W. ; Stanley, Ryan R. E. ; ...

Details

Journal Title:

Communications Biology
Personal Author:

Wringe, Brendan F. ; Jeffery, Nicholas W. ; Stanley, Ryan R. E. ; Hamilton, Lorraine C. ; Anderson, Eric C. ; Fleming, Ian A. ; Grant, Carole ; Dempson, J. Brian ; Veinott, Geoff ; Duffy, Steven J. ; Bradbury, Ian R.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SWFSC (Southwest Fisheries Science Center)
Description:

Domestication is rife with episodes of interbreeding between cultured and wild populations, potentially challenging adaptive variation in the wild. In Atlantic salmon, Salmo salar, the number of domesticated individuals far exceeds wild individuals, and escape events occur regularly, yet evidence of the magnitude and geographic scale of interbreeding resulting from individual escape events is lacking. We screened juvenile Atlantic salmon using 95 single nucleotide polymorphisms following a single, large aquaculture escape in the Northwest Atlantic and report the landscape-scale detection of hybrid and feral salmon (27.1%, 17/18 rivers). Hybrids were reproductively viable, and observed at higher frequency in smaller wild populations. Repeated annual sampling of this cohort revealed decreases in the presence of hybrid and feral offspring over time. These results link previous observations of escaped salmon in rivers with reports of population genetic change, and demonstrate the potential negative consequences of escapes from net-pen aquaculture on wild populations.
Keywords:

Atlantic Salmon Conservation Biology Population Genetics Atlantic Salmon Conservation Biology Population Genetics
Source:

Communications Biology, 1 (108)
DOI:

https://doi.org/10.1038/s42003-018-0112-9
Pubmed Central ID:

PMC6123692
Document Type:

Journal Article
Place as Subject:

Atlantic Ocean
Rights Information:

CC BY
Compliance:

PMC
Main Document Checksum:

urn:sha-512:07b484a02b2c0a2f3553a78c4c400a229820ed75e53f820eda60ba5f57222ab8a74ef3e2c2523fdd7b126f028cd856566ea67d1b457054eb691ba349107a70c7
Download URL:

https://repository.library.noaa.gov/view/noaa/24172/noaa_24172_DS1.pdf
File Type:

[PDF - 966.47 KB ]

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