A new technique for mass-producing sterile fish might one day be used to stop genetically modified fish breeding with each other or with their wild relatives, should they escape from fish farms.
At the moment, the method used to produce sterile fish in large numbers is to subject fish eggs to extremely high pressures, which leaves them with three sets of chromosomes instead of two. Triploidy, as it is called, is the method adopted by US company Aquabounty, which wants to sell its fast-growing GM salmon to ocean fish farmers. But many scientists and the US Department of Agriculture have…
