The total marine catch by Turkey's deep-sea fishermen was 460,521 tons in 2000, most of it anchovies and sardines caught as they migrate seasonally through the Bosporus. In addition, 42,824 tons of freshwater fish were caught. Fishing equipment and methods have been substantially upgraded in recent years. For most of the population, however, the sea is not an important source of food. Exports of fish and fish products amounted to $90.9 million in 2000.