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Transgenic salmon are genetically engineered to grow faster than their wild-type counterparts. They do not grow larger; they simply reach their full size in shorter time. Transgenic salmon that are grown in outdoor pens are all sterile (nonreproducing) females. Why is this important?
On Sep 23, 2024
If the transgenic fish escape from their outdoor pens, they could interbreed with the wild population. Salmon that grow more quickly would out-compete the wild fish for food and mates; therefore, the wild population may die out. To prevent this scenario from occurring, all transgenic salmon grown in outdoor pens are sterile females.