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Acipenseriformes / æ s ɪ ˈ p ɛ n s ə r ɪ f ɔːr m iː z / is an order of basal [1] ray-finned fishes that includes living and fossil sturgeons and paddlefishes (Acipenseroidei), as well as the extinct families Chondrosteidae and Peipiaosteidae. [2] [3] [4] They are the second earliest diverging group of living ray-finned fish after the ...
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.
The lake sturgeon (Acipenser fulvescens), also known as the rock sturgeon, [7] is a North American temperate freshwater fish, one of about 25 species of sturgeon.Like other sturgeons, this species is a bottom feeder and has a partly cartilaginous skeleton, an overall streamlined shape, and skin bearing rows of bony plates on the sides and back.
An Atlantic sturgeon at the Aquarium du Québec. Rather than having true scales, the Atlantic sturgeon has five rows of bony plates known as scutes.Specimens weighing over 800 lb and nearly 15 ft in length have been recorded, but they typically grow to be 6–8 ft (1.8–2.4 m) and no more than 300 lb (140 kg).
Acipenseriformes spp. (Except the species included in Appendix I) Adansonia grandidieri; Adelphobates spp. Adenia firingalavensis; Adenia olaboensis; Adenia subsessilifolia; Adonis vernalis; Agalychnis spp. Agave victoriae-reginae; Allobates femoralis; Allobates hodli; Allobates myersi; Allobates zaparo; Aloe spp. (Except the species included ...
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Chinese sturgeon in Dalian Laohutan Ocean Park. Most sturgeon spawn in fresh water and migrate to salt water to mature. The Chinese sturgeon can be considered a large freshwater fish, although it spends part of its lifecycle in seawater, like the salmon, [9] except Chinese sturgeon spawn multiple times throughout their lives.
Offshore and near-shore energy projects pose potential risks due to electromagnetic fields, habitat competition from both native and non-native species is a high risk, and poor water quality and potential disease transmission from native and non-native species pose a significant future threat.