For some salmon stocks, the damage has already been done.

Clark said that Indian groups indicated that they would support whatever was necessary to restore the salmon stocks.

But little research has been done and it is still unclear what role, if any, these escapees are playing in the decline of wild salmon stocks.

However, salmon stocks are slowly beginning to recover.

The wrestling over the multimillion-dollar salmon stocks led to threats by both sides.

On the West Coast, officials have known for years that salmon stocks were in precarious shape.

Because of this, it is possible that salmon stocks from a single river could be devastated by a high-seas fishery.

Fishing has to be restricted so that the sustainable and natural renewal of salmon stocks is assured.

There is a danger that entire salmon stocks will become extinct.

That is much less than the roughly 4 percent that scientists say the salmon stocks would need to recover fully.