Sturgeon

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Sturgeon
Atlantic sturgeon
(Acipenser oxyrinchus oxyrinchus)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acipenseriformes
Family: Acipenseridae
Subfamilies

Acipenserinae
Scaphirhynchinae

Sturgeon is common name for some 26 species of fish in the family Acipenseridae.

Evolution[change | change source]

Sturgeons have been referred to as "living fossils" or "primitive fish" because their features have stayed little changed since their earliest fossil record.[1][2]

Habitat[change | change source]

Sturgeon range from subtropical to subarctic waters in North America and Eurasia. In North America, they range along the Atlantic coast from the Gulf of Mexico to Newfoundland. They used to be found throughout the Mississippi River, the Great Lakes and the Hudson River.

Throughout this extensive range, almost all species are highly threatened or vulnerable to extinction due to a combination of habitat destruction, overfishing, and pollution.[3]

In the last century, this large fish was often regarded as a nuisance because it often became entangled in and caused commercial fishing nets to become ripped. Only much later did the sturgeon become prized for its meat, eggs (caviar) and oil. Gelatin from the inner lining of its air bladder was used to make isinglass--a substance used as a clarifying agent in jellies, glues and in the isinglass windows of carriages and early cars. Nowadays, the lake sturgeon's dark form can be sometimes be discerned in reedy shallows or near river mouths. The glimpse of it is as rare as it is startling.

References[change | change source]

  1. Chesapeake Bay Field Office. "Atlantic Sturgeon". U.S. Fish & Wildlife Service. http://www.fws.gov/chesapeakebay/sturgeon.html. Retrieved June 10, 2014.
  2. "Lake sturgeon". Minnesota Dept. of Natural Resources. http://www.dnr.state.mn.us/rsg/profile.html?action=elementDetail&selectedElement=AFCAA01020. Retrieved June 10, 2014.
  3. Sturgeon more critically endangered than any other group of species. IUCN, the International Union for Conservation of Nature. [1]