One example of the aquaculture boom is shrimp and prawns. Between the early 1970s and 1997, farmed production grew from a negligible quantity in global terms to around 700,000 tonnes; wild-caught netting has also thrived. Prices for large shrimps, especially, have risen sharply.
Carp provide more than a quarter of fish culture production worldwide. It is estimated that more than four million metric tons are produced annually. The brown sea trout as a food stock in aquaculture is now receiving international recognition. In Britain, farmed salmon is now cheaper than cod. It is hoped that the shift to farmed fish will enable such threatened ocean stocks to recover.