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Scaphirhynchus
''Scaphirhynchus'' is a genus of sturgeons native to North America. All species in this genus are considered to be Threatened species, threatened with extinction or worse. As of 2023, the pallid sturgeon (''S. albus'') and the Alabama sturgeon (''S. suttkusi'') are critically endangered according to the International Union for Conservation of Nature. The etymology of the word ''Scaphirhynchus'' is derived from two Greek words, ''scaphir'' translating to “boat”, while ''rhynchus'' being “snout”. The word ''rhynchus'' is used in the scientific name, be it genus or species for many animals, including the duck-billed platypus, ''ornithorhynchus'' as its genus, meaning “bird-snout”. Distribution Member species are found in the Mississippi River, Mississippi, Missouri River, Missouri, and Alabama Rivers. Species Currently, three species in this genus are recognized: * ''Scaphirhynchus albus'' (Stephen Alfred Forbes, S. A. Forbes & Robert Earl Richardson, R. E. Richardson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphirhynchus Albus
The pallid sturgeon (''Scaphirhynchus albus'') is an endangered species of Actinopterygii, ray-finned fish, endemic to the waters of the Missouri River, Missouri and lower Mississippi River basins of the United States. It may have even reached the St. Croix River (Wisconsin–Minnesota), St. Croix River before Colonization of america, colonization. Named for its pale coloration, it is closely related to the more common shovelnose sturgeon (''Scaphirhynchus platorynchus''), but is much larger, averaging between in length and in weight at maturity. This species takes 15 years to mature and spawns infrequently, but can live up to a century. A member of the sturgeon family, Sturgeon, Acipenseridae, which originated during the Cretaceous period 70 million years ago, the pallid sturgeon has changed little since then. In 1990, the U.S. Fish and Wildlife Service placed the pallid sturgeon on its endangered species list because few young individuals had been observed in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pallid Sturgeon
The pallid sturgeon (''Scaphirhynchus albus'') is an endangered species of ray-finned fish, endemic to the waters of the Missouri and lower Mississippi River basins of the United States. It may have even reached the St. Croix River before colonization. Named for its pale coloration, it is closely related to the more common shovelnose sturgeon (''Scaphirhynchus platorynchus''), but is much larger, averaging between in length and in weight at maturity. This species takes 15 years to mature and spawns infrequently, but can live up to a century. A member of the sturgeon family, Acipenseridae, which originated during the Cretaceous period 70 million years ago, the pallid sturgeon has changed little since then. In 1990, the U.S. Fish and Wildlife Service placed the pallid sturgeon on its endangered species list because few young individuals had been observed in the preceding decade and sightings had greatly diminished; the species is now rarely seen in the wild. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alabama Sturgeon
The Alabama sturgeon (''Scaphirhynchus suttkusi'') is a species of sturgeon native to the United States of America and now only believed to exist in of the lower Alabama River. Its historical ranges were believed to be over 1600 rkm and included the Tombigbee, Alabama, Mobile, Tensaw, Black Warrior, Cahaba, Coosa, and Tallapoosa rivers The fish has a distinctive yellowish-orange color, grows to a size of about long and , and is believed to have a lifespan of 12 to 20 years. Biologists have known of the fish since the 1950s or 1960s, but the large diversity of aquatic species in Alabama prevented formal identification until 1991. Taxonomy J.D. Williams and G.H. Clemmer identified the Alabama sturgeon as the distinct species ''Scaphirhynchus suttkusi'' in 1991. Before its discovery, it was misidentified as a ''Scaphirhynchus platorynchus'', a shovelnose sturgeon, but certain physical differences led to further investigation and the eventual distinction between the two spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sturgeons
Sturgeon (from Old English ultimately from Proto-Indo-European language, Proto-Indo-European *''str̥(Hx)yón''-) 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 Acipenseriformes, acipenseriform fish, which date back to the Early Jurassic period, some 174 to 201 million years ago. They are one of two living families of the Acipenseriformes alongside paddlefish (Polyodontidae). The family is grouped into five genera: ''Acipenser'', ''Huso'', ''Scaphirhynchus,'' ''Sinosturio'', and ''Pseudoscaphirhynchus''. Two species (''Adriatic sturgeon, H. naccarii'' and ''Dabry's sturgeon, S. dabryanus'') may be extinct in the wild, and one (''Syr Darya sturgeon, P. fedtschenkoi'') may be entirely extinct. Sturgeons are native to subtropical, temperate and sub-Arctic rivers, lakes and coastlines of Eurasia and North America. A Maastrichtian-age fossil found i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphirhynchus Platorynchus
The shovelnose sturgeon (''Scaphirhynchus platorynchus'') is the smallest species of freshwater sturgeon native to North America. It is often called hackleback, sand sturgeon, or switchtail. Switchtail refers to the long filament found on the upper lobe of the caudal fin (often broken off as adults). Shovelnose sturgeon are the most abundant sturgeon found in the Missouri River and Mississippi River systems, and were formerly a commercially fished sturgeon in the United States of America (Pflieger 1997). In 2010, they were listed as threatened under the U.S. Endangered Species Act due to their resemblance to the endangered pallid sturgeon (''S. albus''), with which shovelnose sturgeon are sympatric. Description The sturgeons of the family Acipenseridae have bony scutes along the sides and back and four barbels on the underside of the rostrum. A total of 25 extant species of sturgeon are recognized, including 17 within the genus ''Acipenser''. Sturgeon are distributed around th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphirhynchus
''Scaphirhynchus'' is a genus of sturgeons native to North America. All species in this genus are considered to be Threatened species, threatened with extinction or worse. As of 2023, the pallid sturgeon (''S. albus'') and the Alabama sturgeon (''S. suttkusi'') are critically endangered according to the International Union for Conservation of Nature. The etymology of the word ''Scaphirhynchus'' is derived from two Greek words, ''scaphir'' translating to “boat”, while ''rhynchus'' being “snout”. The word ''rhynchus'' is used in the scientific name, be it genus or species for many animals, including the duck-billed platypus, ''ornithorhynchus'' as its genus, meaning “bird-snout”. Distribution Member species are found in the Mississippi River, Mississippi, Missouri River, Missouri, and Alabama Rivers. Species Currently, three species in this genus are recognized: * ''Scaphirhynchus albus'' (Stephen Alfred Forbes, S. A. Forbes & Robert Earl Richardson, R. E. Richardson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Jakob Heckel
Johann Jakob Heckel (23 January 1790 – 1 March 1857) was an Austrian taxidermist, zoology, zoologist, and ichthyology, ichthyologist from Mannheim in the Electoral Palatinate. He worked at the Royal natural history cabinet in Vienna which later became the Austrian Museum of Natural History. Life Heckel was born in Mannheim, the son of a namesake music teacher and Sophia née Reinhardt. He also had a namesake brother who studied music and was educated at home and lived in Vienna for a while. Another brother was Karl Ferdinand Heckel (1800-1870) who also studied music. In 1805 the family fled the French to Pressburg and then to Pest. Heckel visited the Georgicon agricultural college in 1806. His father bought a farm in Gumpoldskirchen and after the death of his father in December 1811, his mother took over the farm, assisted by his brother. He married Barbara Baumgartner in 1817 and in 1818 he was working at the Vienna Naturaliencabinet (which later became the Naturhistorisches Mu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Critically Endangered
An IUCN Red List critically endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. As of December 2023, of the 157,190 species currently on the IUCN Red List, 9,760 of those are listed as critically endangered, with 1,302 being possibly extinct and 67 possibly extinct in the wild. The IUCN Red List provides the public with information regarding the conservation status of animal, fungi, and plant species. It divides various species into seven different categories of conservation that are based on habitat range, population size, habitat, threats, etc. Each category represents a different level of global extinction risk. Species that are considered to be critically endangered are placed within the "Threatened" category. As the IUCN Red List does not consider a species extinct until extensive targeted surveys have been conducted, species that a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union For Conservation Of Nature
The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status of the natural world and the measures needed to safeguard it. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partners ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippi River
The Mississippi River is the main stem, primary river of the largest drainage basin in the United States. It is the second-longest river in the United States, behind only the Missouri River, Missouri. From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's Drainage basin, watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky Mountains, Rocky and Appalachian Mountains, Appalachian mountains. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana. The main stem is entirely within the United States; the total drainage basin is , of which only about one percent is in Canada. The Mississippi ranks as the world's List of rivers by discharge, tenth-largest river by discharge flow, and the largest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alabama River
The Alabama River, in the U.S. state of Alabama, is formed by the Tallapoosa River, Tallapoosa and Coosa River, Coosa rivers, which unite about north of Montgomery, Alabama, Montgomery, near the town of Wetumpka, Alabama, Wetumpka. Over a course of approximately , the river meanders west towards Selma, Alabama, Selma, then southwest until, about from Mobile, Alabama, Mobile, it unites with the Tombigbee River, Tombigbee, forming the Mobile River, Mobile and Tensaw River, Tensaw rivers, which discharge into Mobile Bay. Description The run of the Alabama is highly meandering. Its width varies from , and its depth from . Its length as measured by the United States Geological Survey is ,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 27, 2011 and by steamboat measurement, . The river crosses the richest agricultural and timber districts of the state. Railways connect it with the mineral regions of north-central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
