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The sterlet (Acipenser ruthenus in Linnaeus' classification) is the last of the five native sturgeon species inhabiting the Middle and Upper Danube River. Its population has dropped significantly, mainly due to the degradation of main habitats, spawning grounds and foraging grounds.
Fossil of the †chondrosteid †Strongylosteus hindenburgi, Tübingen Fossil of the †peipiaosteid †Yanosteus longidorsalis, MHNT The living polyodontid Polyodon spathula (American paddlefish) The living acipenserid Acipenser ruthenus (sterlet) The living acipenserid Pseudoscaphirhynchus kaufmanni (false shovelnose sturgeon)
Acipenser is a genus of sturgeons.With 17 living species (others are only known from fossil remains), it is the largest genus in the order Acipenseriformes.The genus is paraphyletic, containing all sturgeons that do not belong to Huso, Scaphirhynchus, or Pseudoscaphirhynchus, with many species more closely related to the other three genera than they are to other species of Acipenser.
A rare type of caviar known as Imperial Caviar, from the Sterlet sturgeon (Acipenser ruthenus), a now nearly extinct species of sturgeon from the Caspian Sea, [3] is sometimes incorrectly labeled as Sevruga, as well as the even rarer Golden Caviar from the albino Sterlet, the caviar being yellow in color.
White sturgeon (Acipenser transmontanus) is a species of sturgeon in the family Acipenseridae of the order Acipenseriformes. They are an anadromous (migratory) fish species ranging in the Eastern Pacific; from the Gulf of Alaska to Monterey, California .
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Acipenser oxyrinchus can grow to a length of 14 ft (4.3 m) and a weight of 800 lb (360 kg). The lifespan of this species can be around 60 years. The lifespan of this species can be around 60 years. The color of Acipenser oxyrinchus is bluish-black or olive brown with lighter sides and a white belly.
[3] [4] The Sakhalin sturgeon (Acipenser mikadoi), which lives in the Amur River basin in China and Russia, and the green sturgeon (A. medirostris), which lives along the Pacific coast of North America, are two different species of sturgeon. Despite their geographical isolation, these two species may have had a recent common ancestor due to the ...