, Portugal The
fishing industry which harvests fish from fisheries can be divided into three main sectors:
commercial,
recreational or
subsistence. They can be
saltwater or freshwater,
wild or
farmed. About 85 percent of total marine fisheries production was finfish, mainly
anchoveta (4.9 million tonnes),
Alaska pollock (3.4 million tonnes) and
skipjack tuna (3.1 million tonnes). Most marine fisheries are based near the
coast. This is not only because harvesting from relatively shallow waters is easier than in the open ocean, but also because fish are much more abundant near the
coastal shelf, due to the abundance of nutrients available there from
coastal upwelling and
land runoff. However, productive wild fisheries also exist in open oceans, particularly by
seamounts, and inland in lakes and rivers. Most fisheries are wild fisheries, but
farmed fisheries are increasing. Farming can occur in coastal areas, such as with
oyster farms, or the
aquaculture of salmon, but more typically fish farming occurs inland, in lakes, ponds, tanks and other enclosures. There are commercial fisheries worldwide for finfish,
mollusks,
crustaceans and
echinoderms, and by extension,
aquatic plants such as
kelp. However, a very small number of species support the majority of the world's fisheries. Some of these species are
herring,
cod,
anchovy, tuna,
flounder,
mullet,
squid,
shrimp, salmon,
crab,
lobster,
oyster and
scallops. All except these last four provided a worldwide catch of well over a
million tonnes in 1999, with herring and
sardines together providing a harvest of over 22 million metric tons in 1999. Many other species are harvested in smaller numbers. In 2022 small-scale fisheries contribute an estimated 40 percent of the global catch and support 90 percent of the capture fisheries workforce, with women representing 40 percent. 500 million people rely on small-scale fisheries for their livelihoods, including 53 million involved in subsistence fishing, of which 45 percent are women. In 2022 inland fisheries produced 11.3 million tonnes, harvested mainly in Asia (63.4 percent) and Africa (29.4 percent), where they are important for food security. Lead producers were India (1.9 million tonnes), Bangladesh (1.3 million tonnes), China (1.2 million tonnes), Myanmar (0.9 million tonnes) and Indonesia (0.5 million tonnes). Inland fisheries figures are likely underestimated due to the difficulties most countries face in collecting these data. == Economic importance ==