I think the idea is that the migration instinct passed down by wild salmon is an epigenetic heritable trait. This trait is strongly selected for in wild salmon populations, but not in farmed populations. The constant influx of this maladaptive trait into the wild population is leading to an overall decrease in the ability of the wild population to successfully propagate.

They’ve bred more docile salmon, according to the article. Getting that DNA into wild populations would be problematic I’d imagine.

If those salmon are too docile, just give them cocaine.

https://www.science.org/content/article/cocaine-pollution-gi...

Hollywood is ready to run the gamut of cocaine-fueled fauna.

That's surprisingly easy. It's been done for chickens. All that was necessary was to put groups of chickens in cages, and keep only the cage groups that were the best egg-layers. After only a few generations, chicken-on-chicken violence was way down.

>docile salmon

Hmm… that made me think of domestication, do you think we could ever have salmon as pets? What’s their character like? More like dogs or cats?