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Green Sturgeon

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Green SturgeonAcipenser medirostris

Green Sturgeon are the most widely distributed and most marine oriented of the Sturgeon family, found throughout the west coast of North America and in Eurasia.  A very large and long lived anadromous fish, Green Strugeon are known to live as long as 70 year reach lengths of up to 7 feet and weigh as much as 350 pounds.  These huge fish are one of the largest and most ancient of fish that have a skeleton made of cartilidge unlike more modern fish species.  While they spawn in very deep pools in large mainstem river systems and the young rear there, the majority of the Sturgeon’s life is spend in near shore marine waters, only returning to freshwater in the spring to spawn after they are more than 15 years in age.  The population of Green Sturgeon that spawns in the Rogue, Klamath and Umpqua Rivers is considered a species of special concern by NOAA and very likely would qualify for protection under the Endangered Species Act with further study.  Like other anadromous fishes sturgeon are declining in the face of dams keeping them out of habitat and large scale degradation of the watersheds.  In addition these fish are very slow reproducing and have had a fairly small population historically, making them even more vulnerable to additional anthroprogenic pressures.

For more information:

http://en.wikipedia.org/wiki/Green_sturgeon

http://www.nwr.noaa.gov/Other-Marine-Species/Green-Sturgeon.cfm

http://www.nmfs.noaa.gov/pr/species/fish/greensturgeon.htm

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