[Stefan-A]

Once habitat restoration is completed then the natural population would grow, provided that it hasn't reached that critical level where not enough females become gravid to ensure population growth. If it has, then it would be necessary to improve their chances of finding a mate. Releasing offspring from a few individuals on the other hand would reduce the genetic diversity and place unnecessary pressure on a recovering population.

Like I said some time ago, it's a problem that we encounter all the time with for example salmon and trout. The wild population doesn't really benefit from the release of captive bred fish, even with restoration of the rivers where they mate. I'm just using this as an example because people have tried to get it to work for decades with very little success.