From an Associated Press story in The Santa Fe New Mexican:

_Papa salmon plus mama salmon equals … baby trout?

Japanese researchers put a new spin on surrogate parenting as they engineered one fish species to produce another in a quest to preserve endangered fish.

The Tokyo University inventors . . . injected newly hatched salmon with stem cells destined to grow into sperm . . . culled from male rainbow trout. . . . [Ten] of 29 male salmon who got the injections produced trout sperm, called milt.

Here’s the bigger surprise: Injecting the male cells into female salmon sometimes worked, too, prompting five female salmon to ovulate trout eggs. That’s a scientific first . . . .

[Researchers] used the salmon-grown trout sperm to fertilize both wild trout eggs and the salmon-grown trout eggs. DNA testing confirmed all the dozens of resulting baby fish were pure trout, he reported. Moreover, those new trout grew up able to reproduce._

What do you think of this stunning development? Could surrogate broodstocking be the answer to producing endangered fish that are difficult to breed in captivity? Or does messing with nature give you pause?