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

被引:73
作者
Wringe, Brendan F. [1 ,2 ]
Jeffery, Nicholas W. [1 ,3 ]
Stanley, Ryan R. E. [4 ]
Hamilton, Lorraine C. [5 ]
Anderson, Eric C. [6 ]
Fleming, Ian A. [2 ]
Grant, Carole [1 ]
Dempson, J. Brian [1 ]
Veinott, Geoff [1 ]
Duffy, Steven J. [1 ]
Bradbury, Ian R. [1 ,2 ,3 ]
机构
[1] Fisheries & Oceans Canada, Sci Branch, 80 East White Hills Rd, St John, NF A1C 5X1, Canada
[2] Mem Univ Newfoundland, Dept Ocean Sci, St John, NF A1C 5S7, Canada
[3] Dalhousie Univ, Fac Comp Sci, Halifax, NS B3H 4R2, Canada
[4] Fisheries & Oceans Canada, Sci Branch, Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada
[5] Fisheries & Oceans Canada, Aquat Biotechnol Lab, Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada
[6] NOAA, Fisheries Ecol Div, Southwest Fisheries Sci Ctr, Natl Marine Fisheries Serv, Santa Cruz, CA 95060 USA
关键词
FARMED SALMON; SALAR L; GENETIC INTROGRESSION; NATIVE POPULATIONS; WILD; HYBRID; RIVER; CONSEQUENCES; PERFORMANCE; DIVERGENCE;
D O I
10.1038/s42003-018-0112-9
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
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.
引用
收藏
页数:9
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