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Salmon Spawn Trout

Salmon-Spawned TroutSalmon spawn endangered trout; the story sounds fishy but it's true. By injecting specialized trout sex cells into sterilized but otherwise healthy salmon embryos, Japanese scientists wound up with male salmon that ejected trout milt (semen) and female salmon bearing trout eggs. Further, trout offspring of these altered salmon were totally normal and able to reproduce as trout—some eliding their salmon ancestry even in their appearance—thus raising hopes for spawning endangered fish species within more common ones.

Source: Scientific American
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