| Dernières modifications. 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 and Idaho to British Columbia. Copyright © 2000-2016 sensagent : Encyclopédie en ligne, Thesaurus, dictionnaire de définitions et plus. (Zoöl.) ○ Lettris [69][70] Under the law of the United Kingdom any sturgeons captured within the realm are personal property of the monarch. [47] They are an ancient species that have survived for millions of years[48] but their future is threatened, due in part to their inherent ancestral characteristics and reproductive specificities. While all Orthodox groups forbid the consumption of sturgeon, some conservative groups do allow it. dictionnaire et traducteur pour sites web. [10] They also have four barbels—sensory organs that precede their wide, toothless mouths. Can you spell these 10 commonly misspelled words? Notably, however, the cartilagineous skeleton is not a primitive character, but a derived one; sturgeon ancestors had bony skeletons. These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sturgeon.' II, 5). [23] Sturgeons feed non-visually. Learn a new word every day. and V.G. haut allem. 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. Both sturgeons and paddlefish have been referred to as "primitive fishes" because their morphological characteristics have remained relatively unchanged since the earliest fossil record. Sergei F. Zolotukhin and Nina F. Kaplanova. Sturgeon is the common name used for some 26 species of fish in the family Acipenseridae, including the genera Acipenser, Huso, Scaphirhynchus and Pseudoscaphirhynchus. (2007). Les jeux de lettre français sont : Sturgeon is the common name for the 27 species of fish belonging to the family Acipenseridae.The earliest sturgeon fossils date to the Late Cretaceous, and are descended from other, earlier acipenseriform fish who date back to the Triassic period some 245 to 208 million years ago. F. Fontana, J. Tagliavini, L. Congiu (2001) Sturgeon genetics and cytogenetics: recent advancements and perspectives. They were in such abundance in the Hudson River, they were called "Albany beef" and sturgeon eggs were given away at local bars as an accompaniment to 5¢ beer. ○ Anagrammes However, some species have evolved purely freshwater existences, such as the lake sturgeon (Acipenser fulvescens) and the Baikal sturgeon (A. baerii baicalensis), or have been forced into them by anthropogenic or natural impoundment of their native rivers, as in the case of some subpopulations of white sturgeon (A. transmontanus) in the Columbia River[14] and Siberian sturgeon (A. baerii) in the Ob basin. They also have four barbels—tactile organs that precede their toothless mouth and are dragged along often murky river bottoms. Quel est le synonyme de petitesse? [34] Whether the species in the Acipenser and Huso genera are monophyletic (descended from one ancestor) or paraphyletic (descended from many ancestors) is still unclear, though the morphologically motivated division between these two genera clearly is not supported by the genetic evidence. Quelle est la définition du mot petit esturgeon? In the Pacific Ocean, they are found in the Amur River along the Russian-Chinese border, on Sakhalin island, and in the Yangtze and other rivers in northeast China. Il est aussi possible de jouer avec la grille de 25 cases. While all Orthodox groups forbid the consumption of sturgeon, some conservative groups do allow it. Espagn. Washington Department of Fish and Wildlife, "Sturgeon More Critically Endangered Than Any Other Group of Species", "Biology of Fishes (chapter: Biodiversity II: Primitive Bony Fishes and The Rise of Modern Teleosts)", "Fish & Habitats– White Sturgeon (Acipenser transmontanus) in British Columbia", "Investigations of anadromous fishes of the Neuse River, North Carolina", "LIFE 04NAT/IT/000126 "Conservation and Breeding of Italian Cobice Endemic Sturgeon. Sturgeons are broadcast spawners, and do not spawn every year because they require specific conditions. A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. 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. Quel est le synonyme de petites eaux? Les lettres doivent être adjacentes et les mots les plus longs sont les meilleurs. [64] For example, currently all anadromous Danube sturgeon (all species except the predominantly freshwater sterlet) are now classed as Critically Endangered or extirpated from the upper and middle reaches of the Danube River above the dams. ○ Anagrammes By using our services, you agree to our use of cookies. Sturgeon definition is - any of a family (Acipenseridae) of usually large elongate anadromous or freshwater bony fishes which are widely distributed in the north temperate zone and whose roe is … Locution nominale. An effort is ongoing to resolve the taxonomic confusion using a continuing synthesis of systematic data and molecular techniques. Fixer la signification de chaque méta-donnée (multilingue). Find all the synonyms and alternative words for sturgeon at Synonyms.com, the largest free online thesaurus, antonyms, definitions and translations resource on the web. Privacy policy Participer au concours et enregistrer votre nom dans la liste de meilleurs joueurs ! However, some species have evolved purely freshwater existences, such as the lake sturgeon (Acipenser fulvescens) and the Baikal sturgeon (A. baerii baicalensis), or have been forced into them by human or natural impoundment of their native rivers, as in the case of some subpopulations of white sturgeon (A. transmontanus) in the Columbia River[21] and Siberian sturgeon (A. baerii) in the Ob basin. esturgeon d’Europe. [20], Most species are at least partially anadromous, spawning in fresh water and feeding in nutrient-rich, brackish waters of estuaries or undergoing significant migrations along coastlines. Lettris est un jeu de lettres gravitationnelles proche de Tetris. Any of various large freshwater and marine fishes of the family Acipenseridae of the Northern Hemisphere, having ganoid scales and edible flesh and valued for their roe, which is used for caviar, and their swim bladders, which are used to make isinglass. SturgeonStur"geon (? Synonymes de "Variété d'esturgeon" Définition ou synonyme. (1911). Regulatory protections and conservation efforts were put in place by state and federal resource agencies in the US and Canada, such as the 1998 US federal moratorium that closed all commercial fishing for Atlantic sturgeon. [17] According to the IUCN, over 85% of sturgeon species are classified as at risk of extinction, making them more critically endangered than any other group of species.[2][18]. In that time, they have undergone remarkably little morphological change, indicating their evolution has been exceptionally slow and earning them informal status as living fossils. Tous droits réservés. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Burtzev (1999) The History of Global Sturgeon Aquaculture. Astuce: parcourir les champs sémantiques du dictionnaire analogique en plusieurs langues pour mieux apprendre avec sensagent. Caviar is prepared from the roe, and isinglass from the air bladder. Their body is partially covered by five rows of large, carinated, bony plates, of which one row runs along the back. Despite the existence of a fossil record, full classification and phylogeny of the sturgeon species has been difficult to determine, in part due to the high individual and ontogenic variation, including geographical clines in certain features, such as rostrum shape, number of scutes and body length. Living fossils.