No, I'm talking about fisheries management practices that do increase stocks. Overfishing is being reduced and harvests are increasing:

http://www.oceanconservancy.org/our-work/fisheries/

The very likely explanation is stocks are increasing in response to the better management.

I agree that it will be difficult to get people in the U.S. to push China to take a more expensive approach to industry. I think calling it 'offshoring' is awfully simplistic (U.S. is agricultural exporter and for energy only imports oil).