TWO salmon beget a trout. And the people who made it happen hope to use the strange parenting trick to conserve endangered fish species.
A team led by Goro Yoshizaki of the Tokyo University of Marine Science and Technology in Japan began by manipulating male embryos of masu or cherry salmon. They did so by transplanting germ cells called spermatogonia from male rainbow trout into the salmon embryos. Within 17 months the salmon had grown into adults that produced pure trout sperm.
They repeated the trick with female salmon embryos, which grew into adults that produced pure trout eggs.…
