Sturgeon is the common name for the 27 species of fish belonging to the family Acipenseridae. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Encyclopædia Britannica (11th ed.). Sturgeon have been referred to as both the Leviathans and Methuselahs of freshwater fish. [24], Many sturgeons leap completely out of the water,[26] usually making a loud splash which can be heard half a mile away on the surface and probably further under water.

Having no teeth, they are unable to seize prey, though larger individuals and more predatory species can swallow very large prey items, including whole salmon. [39] Several species of sturgeon are harvested for their roe which is processed into caviar—a luxury food and the reason why caviar-producing sturgeons are among the most valuable and endangered of all wildlife resources. During their first year of growth, they reach 18 to 20 cm (7.1 to 7.9 in) in length and migrate back into the swift-flowing currents in the main stem river. ), n. [F. esturgeon, LL. Their average lifespan is 50 to 60 years, and their first spawn does not occur until they are around 15 to 20 years old. [41] Within the course of a century, the once abundant sturgeon fisheries in the US and Canada had drastically declined, and in some areas had been extirpated under the pressure of commercial overharvesting, pollution, human encroachment, habitat loss, and the damming of rivers that blocked their ancestral migration to spawning grounds.

(Zoöl.) The wordgames anagrams, crossword, Lettris and Boggle are provided by Memodata. See text for genera and species.

The negative impacts of overfishing, poaching, habitat destruction, and the construction of dams that have altered or blocked their annual migration to ancestral spawning grounds have taken a serious toll. ☞ The common North American species are Acipenser sturio of the Atlantic coast region, Acipenser transmontanus of the Pacific coast, and Acipenser rubicundus of the Mississippi River and its tributaries.

In currently accepted taxonomy, the family Acipenseridae is subdivided into two subfamilies, Acipenserinae, including the genera Acipenser and Huso, and Scaphirhynchinae, including the genera Scaphirhynchus and Pseudosaphirhynchus.[12]. [23] Sturgeons feed non-visually. In North America, they range along the Atlantic coast from the Gulf of Mexico to Newfoundland, including the Great Lakes and the St. Lawrence, Missouri and Mississippi Rivers, as well as along the West Coast in major rivers from California to British Columbia. They feed by extending their syphon-like mouths to suck food from the benthos. They run up rivers to spawn, and are common on the coasts and in the large rivers and lakes of North America, Europe, and Asia. [42] White sturgeon populations along the US west coast declined simultaneously under the pressure of commercial fishing and human encroachment. Le service web Alexandria est motorisé par Memodata pour faciliter les recherches sur Ebay. Can you spell these 10 commonly misspelled words? Multilingual illustrated guide to the world's commercial coldwater fish. Here Be Dragons: A Creature Identification Quiz. En savoir plus.

[3] Two closely related species, Polyodon spathula (American paddlefish) and Psephurus gladius (Chinese paddlefish, extinct) are of the same order, Acipenseriformes, but are in the family Polyodontidae and are not considered to be "true" sturgeons. ], téléostéens - famille des poissons, poisson[Hyper. Sturgeons are long-lived, late-maturing fishes with distinctive characteristics, such as a heterocercal caudal fin similar to those of sharks, and an elongated, spindle-like body that is smooth-skinned, scaleless, and armored with five lateral rows of bony plates called scutes. Fixer la signification de chaque méta-donnée (multilingue). Exemple: "P ris", "P.ris", "P,ris" ou "P*ris"  | Dernières modifications. Espagn. [65], Before 1800, swim bladders of sturgeon (primarily Beluga sturgeon from Russia) were used as a source of isinglass, a form of collagen used historically for the clarification of wine and beer, as a predecessor for gelatin, and to preserve parchments. Quelle est la définition du mot petit esturgeon? On fait avec la vessie natatoire de l'esturgeon l'ichthyocolle ou colle de poisson. Les lettres doivent être adjacentes et les mots les plus longs sont les meilleurs. On a global scale, one such organization is the World Sturgeon Conservation Society (WSCS) whose primary objectives include fostering the "conservation of sturgeon species and restoration of sturgeon stocks world-wide”, and supporting the "information exchange among all persons interested in sturgeons. Sturgeons are among the largest fish: some beluga (Huso huso) in the Caspian Sea reportedly attain over 5.5 m (18 ft) and 2000 kg[11] (4400 lb) while for kaluga (H. dauricus) in the Amur River, similar lengths and over 1,000 kg (2,200 lb) weights have been reported. They do, however, still share several primitive characteristics, such as heterocercal tail, reduced squamation, more fin rays than supporting bony elements, and unique jaw suspension. ], Super-Ordre des Chondrostéens (fr)[ClasseHyper. La plupart des définitions du français sont proposées par SenseGates et comportent un approfondissement avec Littré et plusieurs auteurs techniques spécialisés. Any one of numerous species of large cartilaginous ganoid fishes belonging to Acipenser and allied genera of the family Acipenseridæ. (1997). [2] The family is grouped into four genera: Acipenser, Huso, Scaphirhynchus and Pseudoscaphirhynchus. (2009). Fish. Fuerst. While some are entirely freshwater, very few venture into the open ocean beyond near coastal areas. © 2012 - CNRTL 44, avenue de la Libération BP 30687 54063 Nancy Cedex - France Tél. Letters must be adjacent and longer words score better.

These factors have led researchers in the past to identify over 40 additional species that were rejected by later scientists. WDFW busted another ring in 2003, and conducted an undercover sting operation in 2006-2007 that resulted in 17 successful attempts out of a total of 19. Les oeufs de l'esturgeon constituent un aliment très recherché dans le Nord, sous le nom de caviar. [41][43], By the turn of the century, commercial production of sturgeon caviar in the US and Canada had come to an end. [10] They also have four barbels—sensory organs that precede their wide, toothless mouths. ○   Anagrammes [19], No species is known to naturally occur south of the equator, though attempts at sturgeon aquaculture are being made in Uruguay, South Africa, and other places. (2016). In that time, sturgeons have undergone remarkably little morphological change, indicating their evolution has been exceptionally slow and earning them informal status as living fossils. Some species inhabit freshwater environments exclusively, while others primarily inhabit marine environments near coastal areas, and are known to venture into open ocean. dictionnaire et traducteur pour sites web. [69][70] Under the law of the United Kingdom any sturgeons captured within the realm are personal property of the monarch. Quel autre mot pour petit esturgeon? Along with other members of the subclass Chondrostei, sturgeon are primarily cartilaginous, lack vertebral centra, and are partially covered with bony plates called scutes rather than scales. Les lettres doivent être adjacentes et les mots les plus longs sont les meilleurs. Les jeux de lettres anagramme, mot-croisé, joker, Lettris et Boggle sont proposés par Memodata.  |  and V.G. esturgeon d’Europe. Les oeufs de l'esturgeon constituent un aliment très recherché dans le Nord, sous le nom de caviar. ), XIVe s.— Bresmes en rost, esturgon et gelée (Ménagier, II, 4)— Esturgeon : eschaudez, ostez le limon, couppez la teste et la fendez en deux (ib. Aucun résultat pour esturgeon. A further confounding factor is the peculiar ability of sturgeons to produce reproductively viable hybrids, even between species assigned to different genera. Une fenêtre (pop-into) d'information (contenu principal de Sensagent) est invoquée un double-clic sur n'importe quel mot de votre page web. Froese, Rainer, and Daniel Pauly, eds. ○   Boggle. Il s'agit en 3 minutes de trouver le plus grand nombre de mots possibles de trois lettres et plus dans une grille de 16 lettres. Jouer, Dictionnaire de la langue françaisePrincipales Références. The web service Alexandria is granted from Memodata for the Ebay search. ", "Sturgeon Vignette – Sturgeon for Tomorrow", "Spearing Sturgeon on Wisconsin's Lake Winnebago", "Conservation and sustainable use of wild sturgeon populations of the NW Black Sea and Lower Danube River in Romania", "The incredible powers you didn't know the Queen has", PBS special, video clips and public outreach videos about sturgeon, https://en.wikipedia.org/w/index.php?title=Sturgeon&oldid=986725428, Short description is different from Wikidata, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License, This article incorporates text from a publication now in the, This page was last edited on 2 November 2020, at 16:58. How to use a word that (literally) drives some pe... Do you know what languages these words come from? Exceptionally, both Huso species, the white sturgeon and the pallid sturgeon feed primarily on other fish as adults. With their projecting, wedge-shaped snouts, they stir up the soft bottom, and use the barbels to detect shells, crustaceans and small fish, on which they feed.  | Privacy policy

This has led to serious overexploitation, which combined with other conservation threats, has brought most of the species to critically endangered status, at the edge of extinction. During that time, they are dependent on their yolk sacs for nourishment. A further confounding factor is the peculiar ability of sturgeons to produce reproductively viable hybrids, even between species assigned to different genera. voir la définition de esturgeons dans le Littré, esturgeon adriatique • esturgeon américain • esturgeon au court-bouillon • esturgeon blanc • esturgeon de l'amour • esturgeon vert • esturgeon à nez court • esturgeon à ventre nu • esturgeon étoilé, Esturgeon blanc • Esturgeon d'Europe • Esturgeon jaune, Sous-Classe des Actinoptérygiens[ClasseTaxo. [59] are WSCS affiliates.

Locution nominale. Fishing News Books, Osney Mead, Oxford, England. Quel est le synonyme de petitesse? 4. [40], Sturgeons are long-lived, late maturing fishes with reproductive cycles that include long migrations, and require specific environmental conditions.

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