Purchase only seafood that has not been depleted
Over fishing is a widespread problem that takes place when fish are harvested rapidly enough to deplete fish in the reproductive stage of their life, leaving a sexually immature population that is unable repopulate.
What can I do?
1.) Check the fish you buy at the store to make sure that it is not an depleted species
2.) when you go out, (especially for sushi) make sure that the establishment buys fish from healthy fisheries, this can be hard, the best way is to write them.
3.) I've given up my favorite treat, sushi because most of the fish in sushi have been depleeted worldwide.
Updated marine depletion lists are published online, but here is a good list of what not to buy:
Yellowfin and Bigeye tuna(longline cought), Atlantic flounder and sole, Atlantic cod, grouper, shrimp, skate, monkfish, shark, farmedsSalmon, chilean seabass, snapper and Caspian Sea caviar.
The 'Safe' list includes:
Arctic char, Spanish mackrel, mahimahi, Alaskan salmon and halibut, stone crab, albacore tuna (troll cought), striped bass and catfish.
16% of protein consumed by humans comes from the sea.
30% of fish stocks are depleted and/or overfished.
47% are fished to their biological limit.
80% of 191 of commercial U.S. stock is fully exploited or overfished.