Japan Scientists Breed Salmon From Surrogates, Tokyo University Study

Japanese scientists have successfully bred a type of salmon using surrogate parents of a different species, in a breakthrough that could help preserve endangered creatures, the chief researcher said Tuesday. Researchers froze the testes of the yamame salmon, a fish indigenous to Japan that lives its entire life in rivers, before extracting primordial germ cells and implanting them into otherwise sterile rainbow trout hatchlings.