|
Sinosturio Transmontanus
White sturgeon (''Sinosturio transmontanus'') is a species of sturgeon in the family Acipenseridae of the order Acipenseriformes. They are an Fish migration, anadromous (migratory) fish species ranging in the Eastern Pacific; from the Gulf of Alaska to Monterey, California. However, some are landlocked in the Columbia River Drainage, Montana, and Shasta Lake, Lake Shasta in California, with reported sightings in northern Baja California, Mexico. Taxonomy Prior to 2025, it was placed in the genus ''Acipenser''. However, this placement was long known to be Paraphyly, paraphyletic. In 2025, it was moved to the revived genus ''Sinosturio''. Description ''S. transmontanus'' is distinguished by the two rows of four to eight ganoid bony plates between the anus and anal fin, with about 45 rays present in the dorsal fin. Coloring can range from gray to brownish on the dorsal side, paler on the ventral side, and gray fins. Barbel (anatomy), Barbels are situated anterior to the mouth, cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Richardson (naturalist)
Sir John Richardson Royal Society of London, FRS FRSE (5 November 1787 – 5 June 1865) was a Scotland, Scottish naval surgeon, natural history, naturalist and Arctic explorer. Life Richardson was born at Nith Place in Dumfries the son of Gabriel Richardson, Provost of Dumfries, and his wife, Anne Mundell. He was educated at Dumfries Grammar School. He was then apprenticed to his maternal uncle, Dr James Mundell, a surgeon in Dumfries. Richardson studied medicine at Edinburgh University, and became a surgeon in the navy in 1807. He traveled with John Franklin in search of the Northwest Passage on the Coppermine Expedition of 1819–1822. Richardson wrote the sections on geology, botany and ichthyology for the official account of the expedition. Franklin and Richardson Mackenzie River expedition, returned to Canada in 1825 and went overland by fur trade routes to the mouth of the Mackenzie River. Franklin was to go as far west as possible and Richardson was to go east to the mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaluga (fish)
The kaluga (''Sinosturio dauricus''), also known as the river beluga, is a large predatory sturgeon found in the Amur River basin from Russia to China and near Hokkaido in Japan. With a maximum size of at least and , the kaluga is one of the biggest of the sturgeon family. Unike the slightly larger beluga, this fish has five major rows of dermal scutes and feeds on salmon and other fish in the Amur with nail-like teeth in its jaws. They have grey-green to black backs with a yellowish green-white underbelly. Akin to the beluga, it spends part of its life in salt water, being semi-anadromous. The kaluga has been hunted to near extinction for its valuable roe. Despite constant anti-poaching patrols, poachers still continue to catch the fish. In Russia, illegally fishing for kaluga anywhere on the Amur River is a felony punishable by law. However, kalugas are known to have an aggressive nature, and instances of them toppling fishing boats and drowning fishermen have been reported, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Department Of Fish And Wildlife
The California Department of Fish and Wildlife (CDFW), formerly known as the California Department of Fish and Game (CDFG), is an American state agency under the California Natural Resources Agency. The Department of Fish and Wildlife manages and protects the state's wildlife, wildflowers, trees, mushrooms, algae (kelp and seaweed) and native habitats (ecosystems). The department is responsible for regulatory enforcement and management of related recreational, commercial, scientific, and educational uses. The department also prevents illegal poaching. History The Game Act was passed in 1852 by the California State Legislature and signed into law by Governor John Bigler. The Game Act closed seasons in 12 counties for quail, partridge, mallard and wood ducks, elk, deer, and antelope. A second legislative action enacted the same year protected salmon runs. In 1854, the Legislature extended the act to include all counties of California. In 1860, protection controls were extended f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Of California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an international border with the Mexico, Mexican state of Baja California to the south. With almost 40million residents across an area of , it is the List of states and territories of the United States by population, largest state by population and List of U.S. states and territories by area, third-largest by area. Prior to European colonization of the Americas, European colonization, California was one of the most culturally and linguistically diverse areas in pre-Columbian North America. European exploration in the 16th and 17th centuries led to the colonization by the Spanish Empire. The area became a part of Mexico in 1821, following Mexican War of Independence, its successful war for independence, but Mexican Cession, was ceded to the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acipenser Transmontanus
White sturgeon (''Sinosturio 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. However, some are landlocked in the Columbia River Drainage, Montana, and Lake Shasta in California, with reported sightings in northern Baja California, Mexico. Taxonomy Prior to 2025, it was placed in the genus ''Acipenser''. However, this placement was long known to be paraphyletic. In 2025, it was moved to the revived genus ''Sinosturio''. Description ''S. transmontanus'' is distinguished by the two rows of four to eight ganoid bony plates between the anus and anal fin, with about 45 rays present in the dorsal fin. Coloring can range from gray to brownish on the dorsal side, paler on the ventral side, and gray fins. Barbels are situated anterior to the mouth, closer to the snout than the mouth. At sexual maturity, '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Diversity Web
The Animal Diversity Web (ADW) is a non-profit group that hosts an online database site that collects natural history, classification, species characteristics, conservation biology, and distribution information on species of animals. The website includes photographs, sound clips, and a virtual museum. The local, relational database is written and maintained by staff and student contributors from the University of Michigan. It can be accessed through the web and mobile apps. It offers resources for schoolteachers ("K–12 instructors"),The Animal Diversity Web Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2017. and functions as a virtual museum containing mostly mammals and a collection of skulls that can be virtually handled. Background The ADW was created in 1995 by Philip Myers, a forme ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potamocorbula Amurensis
''Potamocorbula amurensis'' is a species of small saltwater clam, a marine bivalve mollusc in the order Myida. Common names include the overbite clam, the Asian clam, the Amur River clam and the brackish-water corbula. The species is native to marine and brackish waters in the northern Pacific Ocean, its range extending from Siberia to China, Korea and Japan. It has become naturalised in San Francisco Bay. Description ''Potamocorbula amurensis'' grows to a length of about . The umbo is about halfway along the hinge side of the shell and the shape of each valve is like a wide isosceles triangle with rounded corners. The right valve is rather larger than the left so that it overlaps a little at the margin, a fact that distinguishes this species from other similar clams. The surface is smooth with faint concentric sculpture that is parallel to the margin. The general colour is cream, yellowish or light brown. In young individuals, a dark-coloured periostracum covers the outer su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corophium
''Corophium'' is a genus of the amphipod family Corophiidae. Formerly a much larger genus, many species have been transferred to segregate genera such as '' Monocorophium'' and '' Crassicorophium''. Species ''Corophium'' contains 12 species, after the genus was divided into a number of new genera in 1997: *'' Corophium arenarium'' Crawford, 1937 *'' Corophium bicaudatus'' Linnaeus, 1761 *'' Corophium colo'' Lowry, 2004 *'' Corophium denticulatum'' Ren, 1995 *'' Corophium grossipes'' Linnaeus, 1767 *'' Corophium laevicorne'' Sowinsky, 1880 *'' Corophium linearis'' Pennant, 1777 *'' Corophium longicornis'' J. C. Fabricius, 1779 *'' Corophium multisetosum'' Stock, 1952 *'' Corophium orientale'' Schellenberg, 1928 *'' Corophium urdaibaiense'' Marquiegui & Perez, 2006 *''Corophium volutator'' (Pallas, 1766) ''Corophium arenarium'' ''C. arenarium'' may reach 7 mm long and looks very similar to '' C. volutator''. It burrows in bottom sediments, between 10 and 60 metres deep. ''C. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fraser River
The Fraser River () is the longest river within British Columbia, Canada, rising at Fraser Pass near Blackrock Mountain (Canada), Blackrock Mountain in the Rocky Mountains and flowing for , into the Strait of Georgia just south of the City of Vancouver. The river's annual discharge at its mouth is or , and each year it discharges about 20 million tons of sediment into the ocean. Naming The river is named after Simon Fraser (explorer), Simon Fraser, who led an expedition in 1808 on behalf of the North West Company from the site of present-day Prince George, British Columbia, Prince George almost to the mouth of the river. The river's name in the Halqemeylem (Upriver Halkomelem) language is , often seen archaically as Staulo, and has been adopted by the Halkomelem-speaking peoples of the Lower Mainland as their collective name, . The river's name in the Dakelh language is . The Chilcotin language, ''Tsilhqot'in'' name for the river, not dissimilar to the ''Dakelh'' name, is , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromosome
A chromosome is a package of DNA containing part or all of the genetic material of an organism. In most chromosomes, the very long thin DNA fibers are coated with nucleosome-forming packaging proteins; in eukaryotic cells, the most important of these proteins are the histones. Aided by chaperone proteins, the histones bind to and condense the DNA molecule to maintain its integrity. These eukaryotic chromosomes display a complex three-dimensional structure that has a significant role in transcriptional regulation. Normally, chromosomes are visible under a light microscope only during the metaphase of cell division, where all chromosomes are aligned in the center of the cell in their condensed form. Before this stage occurs, each chromosome is duplicated ( S phase), and the two copies are joined by a centromere—resulting in either an X-shaped structure if the centromere is located equatorially, or a two-armed structure if the centromere is located distally; the jo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyploidy
Polyploidy is a condition in which the cells of an organism have more than two paired sets of ( homologous) chromosomes. Most species whose cells have nuclei (eukaryotes) are diploid, meaning they have two complete sets of chromosomes, one from each of two parents; each set contains the same number of chromosomes, and the chromosomes are joined in pairs of homologous chromosomes. However, some organisms are polyploid. Polyploidy is especially common in plants. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Males of bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis; the sporophyte generation is diploid and p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amur Sturgeon
The Amur sturgeon or Japanese sturgeon (''Sinosturio schrenckii'') is a species of fish in the family Acipenseridae found in the Amur River basin in China and Russia. They migrate outwards to the Sea of Japan and the Sea of Okhotsk. The species has 11–16 dorsal, 34–47 lateral, and 7–16 ventral scutes. Their dorsal fins have 38–53 rays and 20–35 anal fin rays. They also have greyish-brown backs and pale ventral sides. The species can reach up to in length, and weigh over .Description and distribution The species is considered to be . Prior to 2025, it was placed in the genus '' |
