29 May 2013:
Genetically Modified Salmon
Can Breed with Wild Fish and Thrive
Fast-growing, genetically modified salmon can interbreed with wild brown trout and produce offspring that grow rapidly and out-compete other wild salmon in streams
, according to a new study. Researchers
from Memorial University in Newfoundland, Canada, found that so-called “Frankenfish” — which are close to being approved for sale in the United States
— can easily interbreed with brown trout in the wild, creating offspring that aggressively compete for food with salmon. In settings that simulated real streams, the offspring of the genetically modified (GM) salmon and brown trout were so aggressive that they suppressed the growth of GM salmon by 82 percent and wild salmon by 54 percent. “These findings suggest that complex competitive interactions associated with transgenesis and hybridization could have substantial ecological consequences for wild Atlantic salmon should they ever come into contact [with GM salmon] in nature,” the researchers wrote in the journal Proceedings of the Royal Society B
. The creator of the GM salmon, Aqua Bounty, said the risks were minimal since all the GM salmon will be female, sterile, and produced in tanks on land
Yale Environment 360 is
a publication of the
Yale School of Forestry
& Environmental Studies
Yale Environment 360
articles are now available in Spanish and Portuguese on Universia
, the online educational network. Visit the site.
Business & Innovation
Policy & Politics
Pollution & Health
Science & Technology
Antarctica and the Arctic
Central & South America
The 2015 Yale e360 Video Contest winner documents a Northeastern town's bitter battle over a wind farm. Watch the video.
is now available for mobile devices at e360.yale.edu/mobile
A 2015 Yale e360 Video Contest winner captures stunning images of wild salmon runs in Alaska. Watch the video.
video goes onto the front lines with Colorado firefighters confronting deadly blazes fueled by a hotter, drier climate. Watch the video.
A three-part series Tainted Harvest
looks at the soil pollution crisis in China, the threat it poses to the food supply, and the complexity of any cleanup. Read the series.
Top Image: aerial view of Iceland
. © Google & TerraMetrics.