@Thomas,
Thomas, you're just jumping into the thread, and making statements which demonstrate that you've not read the thread before the point at which you jumped in, but rather have selected a particular post to argue about. I provided a link to data on the Atlantic bluefin tuna from NOAA. I provided other quotes from articles about the importation of seafood by the Japanese. In particular, i provided a quote from an article to the effect that the Japanese have reduced their importation of seafood, because people have finally decided that they are unwilling to pay such prices. Bluefin tuna may be being overfished--but a 60,000 tons a year at present, it cannot be denied that the market for $100/pound bluefin tuna (at the supplier end) is still huge. I've already provided evidence that the Japanese situation is extraordinary (the NOAA link has data on the price paid in Japan to suppliers). The NOAA link shows the United States, although one of the nations exploiting the bluefin tuna, is a net importer of bluefin tuna--and they aren't paying $100/pound to the supplier.
My point about the bluefin was not to the extent that it was a representative species to show the general problem of overfishing--it was to show that the Japanese commercial fishing industry is motivated by capitalist greed. You can have vigorous capitalism without greed, surely--but society is not obliged to stand aside while capitalists pursue their cupidity. My discussion started with a claim that the Japanese choose culturally to rely so heavily on seafood (based on a quote from another thread suggesting that they consume on the order of one half pound of fish--we're not even talking whale meat here--per person,
per day. I submit that they don't need to do that to meet their food needs. Robert suggested that they do it because it makes good sense logistically. I challenged that idea by pointing out the comparative cost to the Japanese of sending fishing fleets to the Gulf of Mexico and the Mediterranean in search of the bluefin, while at the same time buying the bulk of the world's catch of Atlantic bluefin. It ought to be obvious given that a Japanese fishing fleet that trawls the Gulf of Mexico in search of the bluefin--crossing the Pacific and entering the Gulf through the Panama Canal, the recrossing the Pacific to take the catch home--is motivated by the high return on investment, since simply meeting the food needs of the nation can be accomplished much, much cheaper by importing the products of domestic livestock.
It gets tedious when you just show trying to find an argument, as opposed to following and contributing to the discussions which have been spawned by the thread topic.