Pacific salmon leaping at Willamette Falls, Oregon

Commercial production of salmon in million tonnes 1950–2010^[1]

Salmon ( /ˈsæmən/) is the common name for several species of fish in the family Salmonidae. Several other fish in the same family are called trout; the difference is often said to be that salmon migrate and trout are resident,^{[says who?]} but this distinction does not strictly hold true. Salmon live along the coasts of both the North Atlantic (the migratory species Salmo salar) and Pacific Oceans (half a dozen species of the genus Oncorhynchus), and have also been introduced into the Great Lakes of North America. Salmon are intensively produced in aquaculture in many parts of the world.

Typically, salmon are anadromous: they are born in fresh water, migrate to the ocean, then return to fresh water to reproduce. However, there are populations of several species that are restricted to fresh water through their life. Folklore has it that the fish return to the exact spot where they were born to spawn; tracking studies have shown this to be true, and this homing behavior has been shown to depend on olfactory memory.^[2][3]

Species[link]

The term salmon derives from the Latin salmo, which in turn may have originated from salire, meaning "to leap".^[4] There are nine commercially important species of salmon, occurring in two genera. The first genus, Salmo, contains the Atlantic salmon, found in the north Atlantic. The second genus, Oncorhynchus, contains eight species which occur naturally only in the north Pacific. There is also a stock of introduced chinook salmon in New Zealand. As a group these are known as Pacific salmon.

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Atlantic and Pacific salmon
Genus	Common name	Scientific name	Maximum length	Common length	Maximum weight	Maximum age	Trophic level	Fish Base	FAO	ITIS	IUCN status
Salmo (Atlantic salmon)	Atlantic salmon	Salmo salar Linnaeus, 1758	150 cm	120 cm	46.8 kg	13 years	4.4	[5]	[6]	[7]	Least concern[8]
Oncorhynchus (Pacific salmon)	Chinook salmon	Oncorhynchus tshawytscha (Walbaum, 1792)	150 cm	70 cm	61.4 kg	9 years	4.4	[9]	[10]	[11]	Not assessed
	Chum salmon	Oncorhynchus keta (Walbaum, 1792)	100 cm	58 cm	15.9 kg	7 years	3.5	[12]	[13]	[14]	Not assessed
	Coho salmon	Oncorhynchus kisutch (Walbaum, 1792)	108 cm	71 cm	15.2 kg	5 years	4.2	[15]	[16]	[17]	Not assessed
	Pink salmon	Oncorhynchus gorbuscha (Walbaum, 1792)	76 cm	50 cm	6.8 kg	3 years	4.2	[18]	[19]	[20]	Not assessed
	Sockeye salmon	Oncorhynchus nerka (Walbaum, 1792)	84 cm	58 cm	7.7 kg	8 years	3.7	[21]	[22]	[23]	Least concern[24]
	Steelhead†[citation needed] (rainbow trout)	Oncorhynchus mykiss (Walbaum, 1792)	79.0 cm	cm	10.0 kg	years	3.6	[25]		[26]	Not assessed
	Masu salmon	Oncorhynchus masou (Brevoort, 1856)	79.0 cm	cm	10.0 kg	years	3.6	[27]		[28]	Not assessed

    ^† The steelhead morph of the rainbow trout migrates to sea, while it is not termed "salmon".

Both the Salmo and Oncorhynchus genera also contain a number of species referred to as trout. Within Salmo there are also additional minor taxa that in English have been called salmon, i.e. the Adriatic salmon (Salmo obtusirostris) and Black Sea salmon (Salmo labrax).

Other fishes called salmon[link]

There are also a number of other species whose common names refer to them as being salmon. Of those listed below, the Danube salmon or huchen is a large freshwater salmonid related to the salmon above, but others are marine fishes of the non-related perciform-order:

Some other fishes called salmon
Common name	Scientific name	Maximum length	Common length	Maximum weight	Maximum age	Trophic level	Fish Base	FAO	ITIS	IUCN status
Danube salmon	Hucho hucho (Linnaeus, 1758)	150 cm	70 cm	52 kg	15 years	4.2	[29]		[30]	Endangered[31]
Indian salmon	Eleutheronema tetradactylum (Shaw, 1804)	200 cm	50 cm	145 kg	years	4.4	[32]		[33]	Not assessed
Hawaiian salmon	Elagatis bipinnulata (Quoy & Gaimard, 1825)	180 cm	90 cm	46.2 kg	years	3.6	[34]	[35]	[36]	Not assessed
Australian salmon	Arripis trutta (Forster, 1801)	89 cm	47 cm	9.4 kg	26 years	4.1	[37]		[38]	Not assessed

Eosalmo driftwoodensis, the oldest known salmon fossil in the fossil record, helps scientists figure how the different species of salmon diverged from a common ancestor. The British Columbia salmon fossil provides evidence that the divergence between Pacific and Atlantic salmon had not yet occurred 40 million years ago. Both the fossil record and analysis of mitochondrial DNA suggest that the divergence occurred by 10 to 20 million years ago. This independent evidence from DNA analysis and the fossil record reject the glacial theory of salmon divergence.^[39]

Distribution[link]

Atlantic salmon, Salmo salar.

• Atlantic salmon, (Salmo salar) reproduce in northern rivers on both coasts of the Atlantic Ocean.
  • Land-locked salmon (Salmo salar m. sebago) live in a number of lakes in eastern North America and in Northern Europe, for instance in lakes Onega, Ladoga, Saimaa and Vänern. They are not a different species from the Atlantic salmon, but have independently evolved a non-migratory life cycle, which they maintain even when they could access the ocean.

• Masu salmon or cherry salmon (Oncorhynchus masou) is found only in the western Pacific Ocean in Japan, Korea and Russia. There is also a land-locked subspecies known as the Taiwanese salmon or Formosan salmon (Oncorhynchus masou formosanus) in central Taiwan's Chi Chia Wan Stream.^[40]

• Chinook salmon (Oncorhynchus tshawytscha) is also known in the US as king salmon or blackmouth salmon, and as spring salmon in British Columbia. Chinook are the largest of all Pacific salmon, frequently exceeding 30 lb (14 kg).^[41] The name Tyee is used in British Columbia to refer to Chinook over 30 pounds, and in Columbia River watershed especially large Chinook were once referred to as June Hogs. Chinook salmon are known to range as far north as the Mackenzie River and Kugluktuk in the central Canadian arctic,^[42] and as far south as the Central California Coast.^[43]

• Chum salmon (Oncorhynchus keta) is known as dog, keta, or calico salmon in some parts of the US. This species has the widest geographic range of the Pacific species:^[44] south to the Sacramento River in California in the eastern Pacific and the island of Kyūshū in the Sea of Japan in the western Pacific; north to the Mackenzie River in Canada in the east and to the Lena River in Siberia in the west.

• Coho salmon (Oncorhynchus kisutch) is also known in the US as silver salmon. This species is found throughout the coastal waters of Alaska and British Columbia and as far south as Central California (Monterey Bay).^[45] It is also now known to occur, albeit infrequently, in the Mackenzie River.^[42]

• Pink salmon (Oncorhynchus gorbuscha), known as humpies in southeast and southwest Alaska, are found from northern California and Korea, throughout the northern Pacific, and from the Mackenzie River^[42] in Canada to the Lena River in Siberia, usually in shorter coastal streams. It is the smallest of the Pacific species, with an average weight of 3+¹⁄₂–4 lb (1.6–1.8 kg).^[46]

• Sockeye salmon (Oncorhynchus nerka) is also known in the US as red salmon.^[47] This lake-rearing species is found south as far as the Klamath River in California in the eastern Pacific and northern Hokkaidō island in Japan in the western Pacific and as far north as Bathurst Inlet in the Canadian Arctic in the east and the Anadyr River in Siberia in the west. Although most adult Pacific salmon feed on small fish, shrimp and squid; sockeye feed on plankton that they filter through gill rakers.^[48] Kokanee salmon is a land-locked form of sockeye salmon.

• The Danube salmon or huchen (Hucho hucho), is the largest permanent fresh water salmonid species.

Life cycle[link]

This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2010)

Life cycle of Pacific salmon

Eggs in different stages of development. In some only a few cells grow on top of the yolk, in the lower right the blood vessels surround the yolk and in the upper left the black eyes are visible, even the little lens

Salmon fry hatching — the baby has grown around the remains of the yolk — visible are the arteries spinning around the yolk and little old drops, also the gut, the spine, the main caudal blood vessel, the bladder and the arcs of the gills

Salmon eggs are laid in freshwater streams typically at high latitudes. The eggs hatch into alevin or sac fry. The fry quickly develop into parr with camouflaging vertical stripes. The parr stay for six months to three years in their natal stream before becoming smolts, which are distinguished by their bright silvery colour with scales that are easily rubbed off. It is estimated that only 10% of all salmon eggs survive to this stage.^[49] The smolt body chemistry changes, allowing them to live in salt water. Smolts spend a portion of their out-migration time in brackish water, where their body chemistry becomes accustomed to osmoregulation in the ocean.

Juvenile salmon, parr, grow up in the relatively protected natal river

The parr lose their camouflage bars and become smolt as they become ready for the transition to the ocean

Male ocean phase adult Sockeye

Male freshwater phase adult Sockeye

The salmon spend about one to five years (depending on the species) in the open ocean where they gradually become sexually mature. The adult salmon then return primarily to their natal stream to spawn. In Alaska, the crossing-over to other streams allows salmon to populate new streams, such as those that emerge as a glacier retreats. The precise method salmon use to navigate has not been established, though their keen sense of smell is involved. Atlantic salmon spend between one and four years at sea. (When a fish returns after just one year's sea feeding it is called a grilse in Canada, Britain and Ireland.) Prior to spawning, depending on the species, salmon undergo changes. They may grow a hump, develop canine teeth, develop a kype (a pronounced curvature of the jaws in male salmon). All will change from the silvery blue of a fresh run fish from the sea to a darker colour. Salmon can make amazing journeys, sometimes moving hundreds of miles upstream against strong currents and rapids to reproduce. Chinook and sockeye salmon from central Idaho, for example, travel over 900 miles (1,400 km) and climb nearly 7,000 feet (2,100 m) from the Pacific ocean as they return to spawn. Condition tends to deteriorate the longer the fish remain in fresh water, and they then deteriorate further after they spawn, when they are known as kelts. In all species of Pacific salmon, the mature individuals die within a few days or weeks of spawning, a trait known as semelparity. Between 2% and 4% of Atlantic salmon kelts survive to spawn again, all females. However, even in those species of salmon that may survive to spawn more than once (iteroparity), post-spawning mortality is quite high (perhaps as high as 40 to 50%.)

To lay her roe, the female salmon uses her tail (caudal fin), to create a low-pressure zone, lifting gravel to be swept downstream, excavating a shallow depression, called a redd. The redd may sometimes contain 5,000 eggs covering 30 square feet (2.8 m²).^[50] The eggs usually range from orange to red. One or more males will approach the female in her redd, depositing his sperm, or milt, over the roe.^[48] The female then covers the eggs by disturbing the gravel at the upstream edge of the depression before moving on to make another redd. The female will make as many as seven redds before her supply of eggs is exhausted.^[48]

Each year, the fish experiences a period of rapid growth, often in summer, and one of slower growth, normally in winter. This results in ring formation around an earbone called the otolith, (annuli) analogous to the growth rings visible in a tree trunk. Freshwater growth shows as densely crowded rings, sea growth as widely spaced rings; spawning is marked by significant erosion as body mass is converted into eggs and milt.

Freshwater streams and estuaries provide important habitat for many salmon species. They feed on terrestrial and aquatic insects, amphipods, and other crustaceans while young, and primarily on other fish when older. Eggs are laid in deeper water with larger gravel, and need cool water and good water flow (to supply oxygen) to the developing embryos. Mortality of salmon in the early life stages is usually high due to natural predation and human-induced changes in habitat, such as siltation, high water temperatures, low oxygen concentration, loss of stream cover, and reductions in river flow. Estuaries and their associated wetlands provide vital nursery areas for the salmon prior to their departure to the open ocean. Wetlands not only help buffer the estuary from silt and pollutants, but also provide important feeding and hiding areas.

Salmon that are not killed by other means show greatly accelerated deterioration (phenoptosis, or "programmed aging") at the end of their lives. Their bodies rapidly deteriorate right after they spawn as a result of the release of massive amounts of corticosteroids.

Ecology[link]

Bear cub with salmon

Bears and salmon[link]

In the Pacific Northwest and Alaska, salmon are keystone species, supporting wildlife from birds to bears and otters.^[51] The bodies of salmon represent a transfer of nutrients from the ocean, rich in nitrogen, sulfur, carbon and phosphorus, to the forest ecosystem.

Grizzly bears function as ecosystem engineers, capturing salmon and carrying them into adjacent wooded areas. There they deposit nutrient-rich urine and faeces and partially eaten carcasses. It has been estimated that bears leave up to half the salmon they harvest on the forest floor,^[52][53] in densities that can reach 4,000 kilograms per hectare,^[54] providing as much as 24% of the total nitrogen available to the riparian woodlands.^[55] The foliage of spruce trees up to 500 m (1,600 ft) from a stream where grizzlies fish salmon have been found to contain nitrogen originating from fished salmon.^[55]

Beavers and salmon[link]

Sockeye salmon jumping over beaver dam

Beavers also function as ecosystem engineers; in the process of clear cutting and damming, beavers alter their ecosystem extensively. Beaver ponds can provide critical habitat for juvenile salmon. An example of this was seen in the years following 1818 in the Columbia River Basin. In 1818, the British government made an agreement with the U.S. government to allow U.S. citizens access to the Columbia catchment (see Treaty of 1818). At the time, the Hudson's Bay Company sent word to trappers to extirpate all furbearers from the area in an effort to make the area less attractive to U.S. fur traders. In response to the elimination of beavers from large parts of the river system, salmon runs plummeted, even in the absence of many of the factors usually associated with the demise of salmon runs. Salmon recruitment can be affected by beavers' dams because dams can:^[56][57][58]

• Slow the rate at which nutrients are flushed from the system; nutrients provided by adult salmon dying throughout the fall and winter remain available in the spring to newly-hatched juveniles
• Provide deeper water pools where young salmon can avoid avian predators
• Increase productivity through photosynthesis and by enhancing the conversion efficiency of the cellulose-powered detritus cycle
• Create low-energy environments where juvenile salmon put the food they ingest into growth rather than into fighting currents
• Increase structural complexity with many physical niches where salmon can avoid predators

Beavers' dams are able to nurture salmon juveniles in Estuarine tidal marshes where the salinity is less than 10 ppm. Beavers build small dams of generally less than 2 feet (60 cm) high in channels in the Myrtle zone. These dams can be overtopped at high tide and hold water at low tide. This provides refuges for juvenile salmon so they do not have to swim into large channels where they are subject to predation.^[59]

Parasites[link]

According to Canadian biologist Dorothy Kieser, the myxozoan parasite Henneguya salminicola is commonly found in the flesh of salmonids. It has been recorded in the field samples of salmon returning to the Queen Charlotte Islands. The fish responds by walling off the parasitic infection into a number of cysts that contain milky fluid. This fluid is an accumulation of a large number of parasites.

Henneguya and other parasites in the myxosporean group have a complex life cycle, where the salmon is one of two hosts. The fish releases the spores after spawning. In the Henneguya case, the spores enter a second host, most likely an invertebrate, in the spawning stream. When juvenile salmon migrate to the Pacific Ocean, the second host releases a stage infective to salmon. The parasite is then carried in the salmon until the next spawning cycle. The myxosporean parasite that causes whirling disease in trout, has a similar life cycle.^[60] However, as opposed to whirling disease, the Henneguya infestation does not appear to cause disease in the host salmon — even heavily infected fish tend to return to spawn successfully.

Henneguya salminicola, a myxozoan parasite commonly found in the flesh of salmonids on the West Coast of Canada, in coho salmon

According to Dr. Kieser, a lot of work on Henneguya salminicola was done by scientists at the Pacific Biological Station in Nanaimo in the mid-1980s, in particular, an overview report^[61] which states that "the fish that have the longest fresh water residence time as juveniles have the most noticeable infections. Hence in order of prevalence coho are most infected followed by sockeye, chinook, chum and pink." As well, the report says that, at the time the studies were conducted, stocks from the middle and upper reaches of large river systems in British Columbia such as Fraser, Skeena, Nass and from mainland coastal streams in the southern half of B.C. "are more likely to have a low prevalence of infection." The report also states "It should be stressed that Henneguya, economically deleterious though it is, is harmless from the view of public health. It is strictly a fish parasite that cannot live in or affect warm blooded animals, including man".

According to Klaus Schallie, Molluscan Shellfish Program Specialist with the Canadian Food Inspection Agency, "Henneguya salminicola is found in southern B.C. also and in all species of salmon. I have previously examined smoked chum salmon sides that were riddled with cysts and some sockeye runs in Barkley Sound (southern B.C., west coast of Vancouver Island) are noted for their high incidence of infestation."

Sea lice, particularly Lepeophtheirus salmonis and various Caligus species, including C. clemensi and C. rogercresseyi, can cause deadly infestations of both farm-grown and wild salmon.^[62][63] Sea lice are ectoparasites which feed on mucus, blood, and skin, and migrate and latch onto the skin of wild salmon during free-swimming, planktonic nauplii and copepodid larval stages, which can persist for several days.^[64][65][66] Large numbers of highly populated, open-net salmon farms can create exceptionally large concentrations of sea lice; when exposed in river estuaries containing large numbers of open-net farms, many young wild salmon are infected, and do not survive as a result.^[67][68] Adult salmon may survive otherwise critical numbers of sea lice, but small, thin-skinned juvenile salmon migrating to sea are highly vulnerable. On the Pacific coast of Canada, the louse-induced mortality of pink salmon in some regions is commonly over 80%.^[69]

Wild fisheries[link]

Commercial capture of all true wild salmon species 1950–2010,
as reported by the FAO ^[1]

Recreational fisheries[link]

Angler and ghillie land a salmon, Scotland

Aquaculture[link]

Salmon aquaculture is a major contributor to the world production of farmed finfish, representing about US$10 billion annually. Other commonly cultured fish species include: tilapia, catfish, sea bass, carp and bream. Salmon farming is significant in Chile, Norway, Scotland, Canada and the Faroe Islands, and is the source for most salmon consumed in America and Europe. Atlantic salmon are also, in very small volumes, farmed in Russia and the island of Tasmania, Australia.

Aquaculture production of all true salmon species 1950–2010,
as reported by the FAO ^[1]

Salmon are carnivorous and are currently fed a meal produced from catching other wild fish and other marine organisms. Salmon farming leads to a high demand for wild forage fish. Salmon require large nutritional intakes of protein, and consequently, farmed salmon consume more fish than they generate as a final product. To produce one pound of farmed salmon, products from several pounds of wild fish are fed to them. As the salmon farming industry expands, it requires more wild forage fish for feed, at a time when 75% of the world's monitored fisheries are already near to or have exceeded their maximum sustainable yield.^[70] The industrial scale extraction of wild forage fish for salmon farming then impacts the survivability of the wild predator fish who rely on them for food.

Work continues on substituting vegetable proteins for animal proteins in the salmon diet. Unfortunately, though, this substitution results in lower levels of the highly valued omega-3 fatty acid content in the farmed product.

Intensive salmon farming now uses open-net cages, which have low production costs, but have the drawback of allowing disease and sea lice to spread to local wild salmon stocks.^[71]

On a dry weight basis, 2–4 kg of wild-caught fish are needed to produce one kg of salmon.^[72]

Another form of salmon production, which is safer, but less controllable, is to raise salmon in hatcheries until they are old enough to become independent. They are then released into rivers, often in an attempt to increase the salmon population. This system is referred to as ranching, and was very common in countries such as Sweden before the Norwegians developed salmon farming, but is seldom done by private companies, as anyone may catch the salmon when they return to spawn, limiting a company's chances of benefiting financially from their investment. Because of this, the method has mainly been used by various public authorities and nonprofit groups such as the Cook Inlet Aquaculture Association as a way of artificially increasing salmon populations in situations where they have declined due to overharvesting, construction of dams, and habitat destruction or fragmentation. Unfortunately, there can be negative consequences to this sort of population manipulation, including genetic "dilution" of the wild stocks, and many jurisdictions are now beginning to discourage supplemental fish planting in favour of harvest controls and habitat improvement and protection. A variant method of fish stocking, called ocean ranching, is under development in Alaska. There, the young salmon are released into the ocean far from any wild salmon streams. When it is time for them to spawn, they return to where they were released where fishermen can then catch them.

Artificially incubated chum salmon

Rainbow trout farm in the archipelago of Finland

An alternative method to hatcheries is to use spawning channels. These are artificial streams, usually parallel to an existing stream with concrete or rip-rap sides and gravel bottoms. Water from the adjacent stream is piped into the top of the channel, sometimes via a header pond, to settle out sediment. Spawning success is often much better in channels than in adjacent streams due to the control of floods, which in some years can wash out the natural redds. Because of the lack of floods, spawning channels must sometimes be cleaned out to remove accumulated sediment. The same floods which destroy natural redds also clean them out. Spawning channels preserve the natural selection of natural streams, as there is no benefit, as in hatcheries, to use prophylactic chemicals to control diseases.

Farm-raised salmon are fed the carotenoids astaxanthin and canthaxanthin to match their flesh color to wild salmon.^[73]

One proposed alternative to the use of wild-caught fish as feed for the salmon, is the use of soy-based products. This should be better for the local environment of the fish farm, however, producing soy beans has a high environmental cost for the producing region.

Another possible alternative is a yeast-based co-product of bio-ethanol production, proteinaceous fermentation biomass. Substituting such products for engineered feed can result in equal (sometimes enhanced) growth in fish.^[74] With its increasing availability, this would address the problems of rising costs for buying hatchery fish feed.

Yet another attractive alternative is the increased use of seaweed. Seaweed provides essential minerals and vitamins for growing organisms. It offers the advantage of providing natural amounts of dietary fiber and having a lower glycemic load than grain-based fish meal.^[74] In the best-case scenario, widespread use of seaweed could yield a future in aquaculture that eliminates the need for land, freshwater, or fertilizer to raise fish.^[75]

Management[link]

Spawning sockeye salmon in Becharof Creek, Becharof Wilderness, Alaska

The population of wild salmon declined markedly in recent decades, especially North Atlantic populations which spawn in the waters of western Europe and eastern Canada, and wild salmon in the Snake and Columbia River system in northwestern United States.

Salmon population levels are of concern in the Atlantic and in some parts of the Pacific. Alaska fishery stocks are still abundant, and catches have been on the rise in recent decades, after the state initiated limitations in 1972.^[76][77] Some of the most important Alaskan salmon sustainable wild fisheries are located near the Kenai River, Copper River, and in Bristol Bay. Fish farming of Pacific salmon is outlawed in the United States Exclusive Economic Zone,^{[citation needed]} however, there is a substantial network of publicly funded hatcheries,^[78] and the State of Alaska's fisheries management system is viewed as a leader in the management of wild fish stocks. In Canada, returning Skeena River wild salmon support commercial, subsistence and recreational fisheries, as well as the area's diverse wildlife on the coast and around communities hundreds of miles inland in the watershed. The status of wild salmon in Washington is mixed. Out of 435 wild stocks of salmon and steelhead, only 187 of them were classified as healthy; 113 had an unknown status, 1 was extinct, 12 were in critical condition and 122 were experiencing depressed populations.^[79]

The commercial salmon fisheries in California have been either severely curtailed or closed completely in recent years, due to critically low returns on the Klamath and or Sacramento Rivers, causing millions of dollars in losses to commercial fishermen.^[80] Both Atlantic and Pacific salmon are popular sportfish.

Salmon populations now exist in all the Great Lakes. Coho stocks were planted in the late 1960s in response to the growing population of non-native alewife by the state of Michigan. Now Chinook (King), Atlantic, and Coho (silver) salmon are annually stocked in all Great Lakes by most bordering states and provinces. These populations are not self sustaining and do not provide much in the way of a commercial fishery, but have led to the development of a thriving sport fishery.

Salmon as food[link]

salmon sashimi

Salmon is a popular food. Classified as an oily fish,^[81] salmon is considered to be healthful due to the fish's high protein, high omega-3 fatty acids, and high vitamin D^[82] content. Salmon is also a source of cholesterol, with a range of 23–214 mg/100 g depending on the species.^[83] According to reports in the journal Science, however, farmed salmon may contain high levels of dioxins. PCB (polychlorinated biphenyl) levels may be up to eight times higher in farmed salmon than in wild salmon.^[84] Omega-3 content may also be lower than in wild-caught specimens,^{[citation needed]} and in a different proportion to what is found naturally. Omega-3 comes in three types, alpha-linolenic acid (ALA), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA); wild salmon has traditionally been an important source of DHA and EPA, which are important for brain function and structure, among other things. The body can itself convert ALA omega-3 into DHA and EPA, but at a very inefficient rate (2–15%). Nonetheless, according to a 2006 study published in the Journal of the American Medical Association, the benefits of eating even farmed salmon still outweigh any risks imposed by contaminants.^[85] The type of omega-3 present may not be a factor for other important health functions.

Salmon flesh is generally orange to red, although there are some examples of white-fleshed wild salmon. The natural colour of salmon results from carotenoid pigments, largely astaxanthin but also canthaxanthin, in the flesh.^[86] Wild salmon get these carotenoids from eating krill and other tiny shellfish.

A simple rule of thumb is that the vast majority of Atlantic salmon available on the world market are farmed (almost 99%^[87]), whereas the majority of Pacific salmon are wild caught (greater than 80%).

History[link]

Seine fishing for salmon – Wenzel Hollar, 1607–1677

The salmon has long been at the heart of the culture and livelihood of coastal dwellers. Many people of the Northern Pacific shore had a ceremony to honor the first return of the year. For many centuries, people caught salmon as they swam upriver to spawn. A famous spearfishing site on the Columbia River at Celilo Falls was inundated after great dams were built on the river. The Ainu, of northern Japan, trained dogs to catch salmon as they returned to their breeding grounds en masse. Now, salmon are caught in bays and near shore.

The Columbia River salmon population is now less than 3% of what it was when Lewis and Clark arrived at the river.^[88] Salmon canneries established by settlers beginning in 1866 had a strong negative impact on the salmon population. In his 1908 State of the Union address, U.S. President Theodore Roosevelt observed that the fisheries were in significant decline:^[89][90]

The salmon fisheries of the Columbia River are now but a fraction of what they were twenty—five years ago, and what they would be now if the United States Government had taken complete charge of them by intervening between Oregon and Washington. During these twenty—five years the fishermen of each State have naturally tried to take all they could get, and the two legislatures have never been able to agree on joint action of any kind adequate in degree for the protection of the fisheries. At the moment the fishing on the Oregon side is practically closed, while there is no limit on the Washington side of any kind, and no one can tell what the courts will decide as to the very statutes under which this action and non—action result. Meanwhile very few salmon reach the spawning grounds, and probably four years hence the fisheries will amount to nothing; and this comes from a struggle between the associated, or gill—net, fishermen on the one hand, and the owners of the fishing wheels up the river.

Salmon in mythology[link]

Scales on the "Big Fish" or "Salmon of Knowledge" celebrates the return of fish to the River Lagan

The salmon is an important creature in several strands of Celtic mythology and poetry, which often associated them with wisdom and venerability. In Irish mythology, a creature called the Salmon of Wisdom (or the Salmon of Knowledge)^[91] plays key role in the tale known as The Boyhood Deeds of Fionn. The Salmon will grant powers of knowledge to whoever eats it, and has been sought by the poet Finn Eces for seven years. Finally Finn Eces catches the fish and gives it to his young pupil, Fionn mac Cumhaill, to prepare it for him. However, Fionn burns his thumb on the salmon's juices, and he instinctively puts it in his mouth. As such, he inadvertently gains the Salmon's wisdom. Elsewhere in Irish mythology, the salmon is also one of the incarnations of both Tuan mac Cairill^[92] and Fintan mac Bóchra.^[93]

Salmon also feature in Welsh mythology. In the prose tale Culhwch and Olwen, the Salmon of Llyn Llyw is the oldest animal in Britain, and the only creature who knows the location of Mabon ap Modron. After speaking to a string of other ancient animals who do not know his whereabouts, King Arthur's men Cai and Bedwyr are led to the Salmon of Llyn Llyw, who lets them ride its back to the walls of Mabon's prison in Gloucester.^{[citation needed]}

In Norse mythology, after Loki tricked the blind god Höðr into killing his brother Baldr, Loki jumped into a river and transformed himself into a salmon in order to escape punishment from the other gods. When they held out a net to trap him he attempted to leap over it but was caught by Thor who grabbed him by the tail with his hand, and this is why the salmon's tail is tapered.^[94]

Salmon are central to Native American mythology on the Pacific coast, from the Haida to the Nootka.^{[citation needed]}

Notes[link]

Further reading[link]

External links[link]

Wikimedia Commons has media related to: Salmonidae

• Plea for the Wanderer, an NFB documentary on West Coast salmon
• Fish farms drive wild salmon populations toward extinction Biology News Net. December 13, 2007.
• Salmonid parasites University of St Andrews Marine Ecology Research Group.
• Watershed Watch Salmon Society A British Columbia advocacy group for wild salmon
• Wild Salmon in Trouble: The Link Between Farmed Salmon, Sea Lice and Wild Salmon - Watershed Watch Salmon Society. Animated short video based on peer-reviewed scientific research, with subject background article Watching out for Wild Salmon.
• Aquacultural Revolution: The scientific case for changing salmon farming - Watershed Watch Salmon Society. Short video documentary. Prominent scientists and First Nation representatives speak their minds about the salmon farming industry and the effects of sea lice infestations on wild salmon populations.
• Genetic Status of Atlantic Salmon in Maine: Interim Report (2002) Online book
• University of Washington Libraries Digital Collections – Salmon Collection A collection of documents describing salmon of the Pacific Northwest.
• Canned Salmon Recipes by Alaska Packers' Association, 1900 e-book with color illustrations, available from Internet Archive
• Epicurean.com Salmon Recipes Collected recipes using Salmon at epicurean.com
• Low Sodium Salmon Recipe Recipe to make smoked salmon mousse.
• Salmon-omics: Effect of Pacific Decadal Oscillation on Alaskan Chinook Harvests and Market Price Kevin Ho, Columbia University, 2005.
• Salmon Nation A movement to create a bioregional community, based on the historic spawning area of Pacific salmon (CA to AK).
• The Distribution of Pacific Salmon (Oncorhynchus spp.) in the Canadian Western Arctic, by S. A. Stephenson
• Sea Lice - Coastal Alliance for Aquaculture Reform. An overview of farmed- to wild-salmon interactive effects.
• Salmon Farming Problems - Coastal Alliance for Aquaculture Reform. An overview of environmental impacts of salmon farming.

v t e Salmon Groups and species Salmon Salmonidae Adriatic salmon Atlantic salmon Black Sea salmon Pacific salmon Chum salmon Chinook salmon Coho salmon Masu salmon Pink salmon Steelhead Satsukimasu salmon Sockeye salmon Taiwanese salmon Danube Salmon Sabertooth salmon Genetically modified salmon Fisheries and management Aquaculture of salmon Fly fishing bibliography Environmental issues with salmon Maine Salmon Old McKenzie Fish Hatchery Puget Sound salmon Putcher Putcher fishing Alaska salmon fishery Salmon conservation Salmon run As food Salmon (food) Cured salmon Gravlax Lohikeitto Lomi salmon Lox Poacher's Relish Rui-be Salmon burger Salmon cannery Salmon tartare Smoked salmon Images Diseases and parasites Amoebic gill disease Ceratomyxa shasta Gyrodactylus salaris Henneguya zschokkei Infectious salmon anemia virus M74 syndrome Myxobolus cerebralis Nanophyetus salmincola Salmon louse Sea louse Salmon tapeworm Sphaerothecum destruens Tetracapsuloides bryosalmonae Organisations Atlantic Salmon Federation Cook Inlet Aquaculture Association North Atlantic Salmon Conservation Organization Pacific Salmon Commission Welsh Salmon and Trout Angling Association Wild Salmon Center Yakima Klickitat Fisheries Project Other Ceasg Salmon (color) Salmon of Wisdom Salmon Fishing in the Yemen The Salmon Fly

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There are many people in history who are commonly appended with the phrase "the Great", or who were called that or an equivalent phrase in their own language. Other languages have their own suffixes such as e Bozorg and e azam in Persian and Urdu respectively.

In Persia, the title "the Great" at first seems to be a colloquial version of the Old Persian title "Great King". This title was first used by the conqueror Cyrus II of Persia.^[1]

The Persian title was inherited by Alexander III of Macedon (336–323 BC) when he conquered the Persian Empire, and the epithet "Great" eventually became personally associated with him. The first reference (in a comedy by Plautus)^[2] assumes that everyone knew who "Alexander the Great" was; however, there is no earlier evidence that Alexander III of Macedon was called "the Great".

The early Seleucid kings, who succeeded Alexander in Persia, used "Great King" in local documents, but the title was most notably used for Antiochus the Great (223–187 BC).

Later rulers and commanders began to use the epithet "the Great" as a personal name, like the Roman general Pompey. Others received the surname retrospectively, like the Carthaginian Hanno and the Indian emperor Ashoka the Great. Once the surname gained currency, it was also used as an honorific surname for people without political careers, like the philosopher Albert the Great.

As there are no objective criteria for "greatness", the persistence of later generations in using the designation greatly varies. For example, Louis XIV of France was often referred to as "The Great" in his lifetime but is rarely called such nowadays, while Frederick II of Prussia is still called "The Great". A later Hohenzollern - Wilhelm I - was often called "The Great" in the time of his grandson Wilhelm II, but rarely later.

Rulers[link]

• Abbas I of Persia (1571–1629), Shah of Iran
• Akbar (1542–1605), ruler of the Mughal Empire of South Asia, mainly India
• Alain I of Albret (1440–1522), French aristocrat
• Alexander the Great (356-323 BC), King of Macedonia, Persia, Greece, Egypt, and all of Mesopotamia
• Alexander I of Georgia (1386–1446), King of Georgia
• Alfonso III of León (c. 848-910), King of León, Galicia and Asturias
• Alfred the Great (848/849-899), King of Wessex
• Antiochus III the Great (c. 241–187 BC), ruler of the Seleucid Empire
• Ashoka the Great (c. 304–232 BC), Indian emperor of the Maurya dynasty
• Ashot I of Iberia “the Great”(died 826/830), presiding prince of Iberia (modern Georgia),
• Askia Mohammad I (c. 1442–1538), ruler of the Songhai Empire
• Bhumibol Adulyadej (born 1927), King of Thailand
• Bolesław I Chrobry (967-1025), sometimes called "the Great", first King of Poland
• Bruno the Great (925–965), Archbishop of Cologne and Duke of Lotharingia (also listed in the following section)
• Buddha Yodfa Chulaloke (1736–1809), founder and ruler of the Rattanakosin Kingdom (in what is now Thailand)
• Cnut the Great (c. 985 or 995-1035), King of Denmark, England, Norway and parts of Sweden
• Casimir III the Great (1310–1370), King of Poland
• Catherine the Great (1729–1796), Empress of Russia
• Chandragupta II (reigned 375-413/415), also known as Vikramaditya, ruler of the Gupta empire in India
• Charlemagne (died 814), King of the Franks and Emperor of the Romans
• Chulalongkorn (1853–1910), King of Siam (now Thailand)
• Chlothar II (584-629), King of Neustria and King of the Franks
• Conrad, Margrave of Meissen (c. 1097-1157), Margrave of Meissen
• Constantine I (c. 272-337), Roman emperor
• Cyaxares the Great (c. 625-585 BC), third king of Media
• Cyrus the Great (c. 600 BC or 576 BC–530 BC), founder and ruler of the Persian or Achaemenid Empire
• Darius the Great (550 – 486 BC), third ruler of the Persian Empire
• Devapala (died 850), ruler of the Pala Empire in the Indian subcontinent
• Dionysius I, Greek tyrant of Syracuse^[3]
• Ferdinand I of León and Castile (c. 1015–1065), King of León and Count of Castile
• Frederick the Great (1712–1786), King of Prussia
• Genghis Khan (1162?-1227), founder and Great Khan of the Mongol Empire
• Gero (c. 900–965), ruler of Marca Geronis, a very large march in Europe
• Gustavus Adolphus of Sweden (1594–1632), King of Sweden, founder of the Swedish Empire, and noted military leader
• Gwanggaeto the Great, King of Goguryeo, one of the Three Kingdoms of Korea^[4][5]
• Hanno the Great, the name of three leaders of Carthage, in the 4th, 3rd, and 2nd centuries BC
• Henry I, Duke of Burgundy (946–1002)
• Henry IV of France (1553–1610), King of France and King of Navarre
• Herod the Great (73/74 BC-4 BC), King of Judea
• Hugh the Great (898-956), Duke of the Franks and Count of Paris
• Hugh Magnus of France (1007–1025), co-King of France
• Hugh I, Count of Vermandois (1057–1101)
• Humphrey I de Bohun (died c. 1123), Anglo-Norman aristocrat
• Ivan III of Russia (1440–1505), Tsar of Russia
• John I of Portugal (1358–1433), King of Portugal and the Algarve
• John II of Aragon (1398–1479), King of Aragon and, through his wife, King of Navarre
• Justinian I (483-565), Byzantine Emperor
• Kamehameha I (c. 1758-1819), first King of Hawai'i
• Kanishka (died c. 127), ruler of the Kushan Empire in Central Asia and parts of India
• Kvirike III of Kakheti (1010–1029), King of Kakheti in eastern Georgia
• Kublai Khan (1215–1294), Mongol ruler in the 13th century and Emperor of China; founder of the Yuan Dynasty
• Llywelyn the Great (c. 1172–1240), Prince of Gwynedd and de facto ruler of most of Wales
• Louis I of Hungary (1326–1382), King of Hungary, Croatia and Poland
• Mangrai the Great (1238–1317), Lanna, northern Thailand
• Emperor Meiji (1852–1912), Emperor of Japan
• Mircea I of Wallachia (1355–1418)
• Mithridates II of Parthia (died 88 BC), ruler of the Parthian Empire (in present day Iran)
• Mithridates VI of Pontus (134 BC–63 BC), ruler of Pontus and the Bosporan Kingdom
• Mstislav I of Kiev (1076–1132), Grand Prince of Kievan Rus
• Naresuan (1555–1605), King of Ayutthaya
• Narai (1633–1688), King of Ayutthaya (in what is now modern Thailand)
• Odo the Great (died c. 735), Duke of Aquitaine
• Otto I, Holy Roman Emperor (912-973)
• K'inich Janaab' Pakal (603-683), ruler of the Mayan city-state of Palenque
• Parakramabahu I of Polonnaruwa (1123–1186), King of Sri Lanka
• Peter Krešimir IV of Croatia (died 1075), King of Croatia
• Peter the Great (1672–1725), Tsar of Russia
• Peter III of Aragon (1239–1285), King of Aragon and King of Sicily
• Pompey (106 BC-48 BC), military and political leader of the late Roman Republic, rival of Julius Caesar
• Radama I (1793–1828), first king of greater Madagascar
• Raja Raja Chola I (c. 947-1014), Indian emperor of the Cholas.^[6][7][8]
• Rajendra Chola I (reigned 1014–1044), Tamil King of India
• Ramesses II (reigned 1279 BC – 1213 BC), considered the greatest pharaoh of Ancient Egypt
• Ram Khamhaeng (around 1237 to 1247-1298), King of Sukhothai (in present day Thailand)
• Ramon Berenguer III, Count of Barcelona (1082–1131), also Count of Provence and various other counties
• Rhodri the Great (c. 820–878), King of Gwynedd (in present day Wales)
• Roman the Great (after 1160-1205), Grand Prince of Kiev
• Saladin (c. 1138-1193), Kurdish Sultan of Egypt and Syria, founder of the Ayyubid dynasty, and victor over the Crusaders
• Samudragupta (c. 335–375), ruler of the Gupta empire in the Indian subcontinent
• Sancho III of Navarre (c. 992-1035), King of Kingdom of Navarre
• Sargon of Akkad (died c. 2215 BC), ruler of the Akkadian Empire
• Sejong the Great (1397–1450), Korean king^[9]
• Shapur II (309-379), king of the Sassanid Empire, Persia
• Simeon I of Bulgaria (864/865-927), ruler of the First Bulgarian Empire
• Stephen III of Moldavia (1433–1504), Prince of Moldavia (Romania)
• Stephen Uroš IV Dušan of Serbia (c. 1308-1355), King of Serbia and Emperor of the Serbs and Greeks
• Taksin (1734–1782), King of the Thonburi Kingdom (Thailand)
• Tamar (1160-1123), Queen of the Georgian Empire
• Timur (1336–1405), better known as Tamerlane, founder of the Timurid Dynasty
• Theobald II, Count of Champagne (1090–1151), Count of Blois and of Chartres as Theobald IV, Count of Champagne and of Brie
• Theodoric the Great (454-526), King of the Ostrogoths, regent of the Visigoths and a viceroy of the Byzantine Empire
• Theodosius I (347-395), Roman emperor
• Tigranes the Great (140-55 BC), Emperor of Armenia
• Tiridates III of Armenia (285-339), King of Armenia
• Umar (c. 586 to 590–644), second caliph of the Muslim Empire
• Valdemar I of Denmark (1131–1182), King of Denmark
• Valentinian I (364-375), Roman Emperor
• Vladimir I of Kiev (c. 958-1015), ruler of Kievan Rus
• Vytautas (c. 1350-1430), archduke of the Lithuanian Grand Duchy
• William I, Count of Burgundy (1020–1087), Count of Burgandy and Mâcon
• William V, Duke of Aquitaine (969-1030), also Count of Poitou
• Xerxes I (519-465 BC), King of Kings of the Achaemenid Empire (Persia)
• Yu the Great (c. 2200-2100 BC), legendary ruler in ancient China

Religious figures[link]

• Abraham the Great of Kashkar (ca. 492-586), monk and saint of the Assyrian Church of the East
• Abraham Kidunaia (died c. 366, hermit, priest, and Christian saint of Mesopotamia
• Albertus Magnus (1193/1206–1280), medieval German philosopher and theologian
• Anthony the Great (c. 251–356), early Christian saint of Egypt
• Babai the Great (c. 551–628), Assyrian church leader
• Basil of Caesarea (330-379), Greek bishop and theologian
• Bruno the Great (925–965), Archbishop of Cologne and Duke of Lotharingia (also listed in the previous section)
• Euthymius the Great (377-473), abbot and Roman Catholic and Eastern Orthodox saint
• Gertrude the Great (1256-c. 1302), German Benedictine, mystic, theologian and Roman Catholic saint
• Pope Gregory I (c. 540-604)
• Hiyya the Great, 3rd-century rabbi, Palestine
• Pope John Paul II (1920–2005)
• Pope Leo I (c. 391 or 400-461)
• Macarius of Egypt (c. 300-391), Egyptian hermit
• Pope Nicholas I (c. 800-867)
• Photius I of Constantinople (c. 810–c. 893), Eastern Orthodox saint and Patriarch of Constantinople
• William of Maleval (died 1157), founder of the Catholic congregation of Williamites

Other[link]

• Beli Mawr, a figure in medieval Welsh literature and genealogies
• Emmy the Great, folk singer
• Matteo Rosso the Great, Roman politician and father of Pope Nicholas III
• Prokop the Great, Hussite general in Bohemia

See also[link]

• Epithet
• List of monarchs by nickname
• List of nicknames of European Royalty and Nobility: G-I
• James, son of Zebedee, also known as James the Greater, one of the twelve apostles of Jesus
• Ajax (mythology), called Ajax the Greater
• Mohandas Karamchand Gandhi, whose common honorific "Mahatma" means "Great Soul"

Notes[link]

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The Chemical Brothers
The Chemical Brothers performing live. Ed Simons (left) and Tom Rowlands (right)
Background information
Also known as	The 237 Turbo Nutters, The Dust Brothers, Chemical Ed & Chemical Tom
Origin	Manchester,[1] United Kingdom
Genres	Big beat, electronica,[2] techno, trip hop, alternative dance, neo-psychedelia[3]
Years active	1991–present
Labels	Junior Boy's Own, Astralwerks, Freestyle Dust, Virgin, Ultra
Website	TheChemicalBrothers.com
Members
Tom Rowlands Ed Simons

The Chemical Brothers are a British electronic music duo composed of Tom Rowlands and Ed Simons. Originating in Manchester^[1] in 1991, along with The Prodigy, Fatboy Slim, The Crystal Method, and fellow acts, they were pioneers at bringing the big beat genre to the forefront of pop culture.

History[link]

Background (1984–1991)[link]

Ed Simons was born in Herne Hill, South London on 9 June 1970 to a barrister mother and a father who was not around much when Simons was growing up. Simons' two main interests when he was young were aeroplanes and musicals. Simons attended two South London public schools, Alleyn's School and Dulwich College. During his school years, he developed a fondness for rare groove and Hip hop music, having frequented a club called The Mud Club from the age of 14. By the time he left school, his two main musical interests were two Manchester bands, New Order and The Smiths. After finishing school with 11 O levels and three A-levels, he continued on to study history, especially late medieval history, at the University of Manchester.^{[citation needed]}

Tom Rowlands, a childhood classmate of Simons', was born on 11 January 1971 in Kingston upon Thames, London. When Rowlands was very young, his family relocated to Henley-on-Thames. He later attended Reading Blue Coat School in Berkshire, during which time he became obsessed with Scotland, developing a fondness for the bagpipes in particular. In his early teens, his interest in music broadened to other genres. Initially, some of his favourites included the Oh What a Lovely War soundtrack, 2 Tone, the nascent gothic rock genre (Sisters of Mercy, Fields of the Nephilim) and the electro sounds of artists such as Kraftwerk, New Order, Cabaret Voltaire, and Heaven 17. He described the first Public Enemy album as the record that probably changed his life, and commented that "Miuzi Weighs a Ton" was one of the most amazing tracks he had ever heard.^{[citation needed]} Rowlands also started collecting hip hop records by artists like Eric B and Schoolly D. Rowlands left school with similar accomplishments to Simons', achieving nine O levels and three A levels. For university, he followed Simons to Manchester primarily to immerse himself in its music scene in general and the Haçienda in particular.^{[citation needed]}

Rowlands was also in a band called Ariel prior to meeting up with Simons. Ariel was formed in London by Rowlands and his friends Brendan Melck and Matt Berry. Their first single was "Sea of Beats", which was essentially a white label. Before Philip Brown set up Echo Logik Records, their first promo was "Bokadilo". Other songs, released on 12", included "Mustn't Grumble" and their most well-known, "Rollercoaster". After a year on Echo Logik they signed to the record label deConstruction. They insisted that they get a female singer and they recruited former Xpansions frontwoman Sally Ann Marsh, and after some disappointing songs like "Let It Slide" (Rowlands would later describe it as "a stinker") the band fell apart. One of the last things Ariel did was the song "T Baby" which was remixed by the pair.^{[citation needed]}

Rowlands and Simons then started to DJ at a club called "Naked Under Leather" in the back of a pub in 1992 under the alias of "The 237 Turbo Nutters" (named after the number of their house on Dickenson Road in Manchester and a reference to their Blackburn raving days). The pair would play hip hop, techno, and house.^[4]

The Dust Brothers (1992–1994)[link]

Rowlands and Simons called themselves The Dust Brothers, after the US production duo famous for their work with the Beastie Boys. After a while, they began to run out of suitable instrumental hip hop tracks to use, so they started to make their own. Using a Hitachi hi-fi system, a computer, a sampler, and a keyboard, they recorded "Song to the Siren", which sampled This Mortal Coil. "Song to the Siren" was released on their own record label, called "Diamond Records" (after Ed's nickname). In October 1992, they pressed 500 white label copies and took them to various dance record shops around London, but none would play it, saying that it was too slow (the track played at 111 BPM).^{[citation needed]} They sent a copy to London DJ Andrew Weatherall, who made it a permanent fixture in his DJ sets. Weatherall also signed the band to his Junior Boy's Own label.^{[citation needed]} In May 1993, Junior Boy's Own released "Song to the Siren".

Around June 1993, the Dust Brothers did their first remixes. The first was "Packet of Peace" for Justin Robertson's Lionrock outfit, followed by tracks for Leftfield, Republica, and The Sandals. Late in 1993, The Dust Brothers completed work on their Fourteenth Century Sky EP, released in January 1994. It contained the ground-breaking "Chemical Beats", which epitomized the duo's genre-defining big beat sound, later taken up by Fatboy Slim and many more. The EP also contained "One Too Many Mornings", which for the first time showed the less intense, more chilled-out side of The Dust Brothers. Both "One Too Many Mornings" and "Chemical Beats" would later appear on their debut album. Fourteenth Century Sky was followed later in 1993 by the My Mercury Mouth EP. "Chemical Beats" was also part of the soundtrack for the first edition of the Wipeout games series, having been featured in Wipeout for the PlayStation in 1995.^{[citation needed]}