I honestly can't answer that question. I think that would be well addressed to some of the folks who are actually operational experts. My understanding, from what I've heard, is that it would be 20 to 25 years, possibly quite a bit longer. Perhaps a way of answering that would be to look to some of the hatcheries that have been in operation for an extended period of time, because closed containment technology is really a bigger hatchery.
On December 8th, 2011. See this statement in context.