Nov 13
Anadromy

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'Anadromy, in the strict sense of the word, is a strategy in aquatic organisms where individuals migrate from a large body of water (lake or sea) upstream on a body of flowing water (river or stream) for the purpose of spawning. However, in the current use of the word it refers solely to populations of aquatic organisms that migrate from the sea to freshwater to spawn. Atlantic salmon is probably the most well know example, but other examples are shads, sturgeons, and even most populations of the three-spined stickleback.

Anadromy is more frequently encountered at northern latitudes because the marine environment in Arctic, boreal, and temperate climatic zones is more productive than freshwater environments, providing better feeding opportunities for individuals that venture out to sea. 

​For ICES working groups that focus on anadromous fish, anadromy is a very important factor in the work they do. Anadromous species and populations are generally at much greater risk of extinction because they utilise a much wider range of habitats and migrate over considerably longer distances for spawning, feeding, or overwintering compared to resident fish.'

Comments

Aquatic species that migrat...

Aquatic species that migrate from sea to fresh water wrestling with the currents, shads , state sturgeons and even  populations of a bi-three of the spined stikleback in the northern latitudes in joining veture and with stable  feeding oppurtinities for individuals generally at risk of extinction and gleaning utility a much broader range of critical habitat in aquatic native and nonnative organisms and shads, and stikle backs and sturgeons through upstream in freshwater winding streams at the nothernest of an individuals migratory corridore in steep cliff areas of degradtion around its important come back of spawning aquatic forage organisms gives somewhat a bit more clarity to the picture.
 on 1/13/2017 4:45

Aquatic species that migrat...

Aquatic species that migrate from sea to fresh water wrestling with the currents, shads , state sturgeons and even  populations of a bi-three of the spined stikleback in the northern latitudes in joining veture and with stable  feeding oppurtinities for individuals generally at risk of extinction and gleaning utility a much broader range of critical habitat in aquatic native and nonnative organisms and shads, and stikle backs and sturgeons through upstream in freshwater winding streams at the nothernest of an individuals migratory corridore in steep cliff areas of degradtion around its important come back of spawning aquatic forage organisms gives somewhat a bit more clarity to the picture.
 on 1/13/2017 4:45

Aquatic species that migrat...

Aquatic species that migrate from sea to fresh water wrestling with the currents, shads , state sturgeons and even  populations of a bi-three of the spined stikleback in the northern latitudes in joining veture and with stable  feeding oppurtinities for individuals generally at risk of extinction and gleaning utility a much broader range of critical habitat in aquatic native and nonnative organisms and shads, and stikle backs and sturgeons through upstream in freshwater winding streams at the nothernest of an individuals migratory corridore in steep cliff areas of degradtion around its important come back of spawning aquatic forage organisms gives somewhat a bit more clarity to the picture.
 on 1/13/2017 4:45

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