Salmon

all other Oncorhynchus as well as Salmo species

Salmon is a common take for several generation of ray-finned fish in the family Salmonidae. Other fish in the same quality include trout, char, grayling, together with whitefish. Salmon are native to tributaries of the North Atlantic genus Salmo & Pacific Ocean genus Oncorhynchus. many species of salmon name been provided into non-native tables such as the Great Lakes of North America and Patagonia in South America. Salmon are intensively farmed in many parts of the world.

Typically, salmon are anadromous: they hatch in fresh water, migrate to the ocean, then benefit to fresh water to reproduce. However, populations of several species are restricted to fresh water throughout their lives. Folklore has it that the fish utility to the exact spot where they hatched to spawn. Tracking studies have filed this to be mostly true. A ingredient of a returning salmon run may stray and spawn in different freshwater systems; the percent of straying depends on the species of salmon. Homing behavior has been shown to depend on olfactory memory.

Species

The term "salmon" comes from the Latin salmo, which in reorder might have originated from salire, meaning "to leap". The nine commercially important species of salmon occur in two genera. The genus Salmo contains the Atlantic salmon, found in the North Atlantic, as living as many species commonly named trout. The genus Oncorhynchus contains eight species which arise naturally only in the North Pacific. As a group, these are call as Pacific salmon. Chinook salmon have been introduced in New Zealand and Patagonia. Coho, freshwater sockeye, and Atlantic salmon have been establishment in Patagonia, as well.

    ^{† Both the Salmo and Oncorhynchus genera also contain a number of species indicated to as trout. Within Salmo, additional minor taxa have been called salmon in English, i.e. the Adriatic salmon Salmo obtusirostris and Black Sea salmon Salmo labrax. The steelhead anadromous form of the rainbow trout migrates to sea, but it is for not termed "salmon".}

Also, there are several other species which are non true salmon, as in the above list but have common names which refer to them as being salmon. Of those subjected below, the Danube salmon or huchen is a large freshwater salmonid related to the salmon above, but others are marine fishes of the unrelated Perciformes order:

Eosalmo driftwoodensis, the oldest requested salmon in the fossil record, enable scientists figure how the different species of salmon diverged from a common ancestor. The British Columbia salmon fossil enables evidence that the divergence between Pacific and Atlantic salmon had non yet occurred 40 million years ago. Both the fossil record and analysis of mitochondrial DNAthe divergence occurred 10 to 20 million years ago. This self-employed grownup evidence from DNA analysis and the fossil record indicate that salmon divergence occurred long previously the glaciers of Quaternary glaciation began their cycle of proceed and retreat.