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Giant Stumptail Stingray
The giant stumptail stingray, ''Dasyatis gigantea'', is a species of stingray in the family Dasyatidae, known from only two specimens collected from the Peter the Great Bay in the Sea of Japan. This large species is characterized by rhomboid pectoral fin disc wider than long, a relatively long snout, and a short, blunt tail (though tail damage experienced by the original rays caught is a possibility). The International Union for Conservation of Nature (IUCN) has listed this species as Data Deficient and recommended further study. Taxonomy Russian ichthyologist Georgii Ustinovich Lindberg published the description of the giant stumptail stingray in his and Soldatov's 1930 ''A Review of the Fishes of the Far-Eastern Seas''. Lindberg created the new genus ''Urolophoides'' for this species, in reference to its short tail which resembles that of stingrays in the genus '' Urolophus''. In 1990, Nishida and Nakaya placed ''Urolophoides'' in synonymy with ''Dasyatis''. In 1999, Dolganov p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georgii Ustinovich Lindberg
Georgii may refer to: ;Given name *Georgii Zantaraia (born 1987), Ukrainian judoka of Georgian origin *Georgii Karpechenko (1899–1941) Russian and Soviet biologist * Georgii Frederiks (1889–1938), Russian geologist * Georgii Zeliony (1878–1951), Russian physiologist * Georgii Stackelberg (1851–1913), cavalry general in the Imperial Russian Army *Georgii Nadson (1867–1939), Soviet biologist * Georgii Cherkin (born 1977), Bulgarian pianist *Georgii Yurii Pfeiffer (1872–1946) Ukrainian and Soviet mathematician *Georgii Stenberg (1900–1933) Soviet artist and designer; see Stenberg brothers * Georgii Merkulov (born 2000), Russian ice hockey player ;Other *'' Psalterium Georgii'', constellation created by Maximilian Hell in 1789 *'' Magnolia georgii'', species of plant in the family Magnoliaceae *''Rhacophorus georgii'', species of frog in the family Rhacophoridae *''Tetrapturus georgii'', see Roundscale spearfish * Russian battleship ''Georgi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Stingray
The red stingray (''Hemitrygon akajei'') is a species of stingray in the family Dasyatidae, found in the northwestern Pacific Ocean off Japan, Korea, and China, and possibly elsewhere. It primarily inhabits shallow, sandy habitats close to shore, and has been known to enter brackish water. The red stingray has a diamond-shaped pectoral fin disc and gains its common name from its bright orange-red underside; there may also be patches of orange at various spots on its upper surface. Most individuals are no more than long. Feeding mainly on crustaceans and bony fishes, the red stingray plays a key ecological role as an apex predator in its environment. Reproduction is aplacental viviparous, with females giving birth to 1 or up to 10 pups at a time. The red stingray is valued as food in Japan; large numbers are caught as bycatch and brought to market, which has seemingly led to a population decline in this unprolific species. As a result, the International Union for Conservation of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Georgii Ustinovich Lindberg
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dasyatis
''Dasyatis'' (Greek alphabet, Greek δασύς ''dasýs'' meaning wikt:rough, rough or Density, dense and βατίς ''batís'' meaning Skate (fish), skate) is a genus of stingray in the family (biology), family Dasyatidae that is native to the Atlantic, including the Mediterranean. In a 2016 Taxonomy (biology), taxonomic revision, many of the species formerly assigned to ''Dasyatis'' were reassigned to other genera (''Bathytoshia'', ''Fontitrygon'', ''Hemitrygon'', ''Hypanus'', ''Megatrygon'' and ''Telatrygon''). Species *''Blue stingray, Dasyatis chrysonota'' Andrew Smith (zoologist), A. Smith, 1828 (blue stingray) *''Giant stumptail stingray, Dasyatis gigantea'' (Georgii Ustinovich Lindberg, Lindberg, 1930) (giant stumptail stingray) *''Groovebelly stingray, Dasyatis hypostigma'' Hugo Ricardo Secioso Santos, H. R. S. Santos & Marcelo Rodrigues de Carvalho, M. R. de Carvalho, 2004 (groovebelly stingray) *''Dasyatis marmorata'' Franz Steindachner, Steindachner, 1892 (marbled s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fisheries
Fishery can mean either the enterprise of raising or harvesting fish and other aquatic life or, more commonly, the site where such enterprise takes place ( a.k.a., fishing grounds). Commercial fisheries include wild fisheries and fish farms, both in freshwater waterbodies (about 10% of all catch) and the oceans (about 90%). About 500 million people worldwide are economically dependent on fisheries. 171 million tonnes of fish were produced in 2016, but overfishing is an increasing problem, causing declines in some populations. Because of their economic and social importance, fisheries are governed by complex fisheries management practices and legal regimes that vary widely across countries. Historically, fisheries were treated with a "first-come, first-served" approach, but recent threats from human overfishing and environmental issues have required increased regulation of fisheries to prevent conflict and increase profitable economic activity on the fishery. Modern jurisd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dermal Denticle
A fish scale is a small rigid plate that grows out of the skin of a fish. The skin of most jawed fishes is covered with these protective scale (zoology), scales, which can also provide effective Underwater camouflage, camouflage through the use of animal reflectors, reflection and animal coloration, colouration, as well as possible hydrodynamic advantages. The term ''scale'' derives from the Old French , meaning a shell pod or husk. Scales vary enormously in size, shape, structure, and extent, ranging from strong and rigid armour plates in fishes such as shrimpfishes and boxfishes, to microscopic or absent in fishes such as eels and anglerfishes. The morphology (biology), morphology of a scale can be used to identify the species of fish it came from. Scales originated within the jawless ostracoderms, ancestors to all jawed fishes today. Most Osteichthyes, bony fishes are covered with the cycloid scales of salmon and carp, or the ctenoid scales of perch, or the ganoid scales of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelvic Fin
Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hindlimbs of tetrapods, which evolved from lobe-finned fish during the Middle Devonian. Structure and function Structure In actinopterygians, the pelvic fin consists of two endochondrally-derived bony girdles attached to bony radials. Dermal fin rays ( lepidotrichia) are positioned distally from the radials. There are three pairs of muscles each on the dorsal and ventral side of the pelvic fin girdle that abduct and adduct the fin from the body. Pelvic fin structures can be extremely specialized in actinopterygians. Gobiids and lumpsuckers modify their pelvic fins into a sucker disk that allow them to adhere to the substrate or climb structures, such as waterfalls. In priapiumfish, males have modified their pelvic structures into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spiracle (vertebrates)
Spiracles () are openings on the surface of some animals, which usually lead to respiratory systems. The spiracle is a small hole behind each eye that opens to the mouth in some fish. In the Agnatha, jawless fish, the first gill opening immediately behind the mouth is essentially similar to the other gill openings. With the evolution of the jaw in the early gnathostomes, jawed vertebrates, this gill slit was caught between the forward gill-rod (now functioning as the jaw) and the next rod, the Hyomandibula, hyomandibular bone, supporting the jaw hinge and anchoring the jaw to the skull proper. The gill opening was closed off from below, the remaining opening was small and hole-like, and is termed a spiracle. In many species of Shark, sharks and all Batoidea, rays the spiracle is responsible for the intake of water into the buccal space before being expelled from the gills. The spiracle is often located towards the top of the animal allowing breathing even while the animal is most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vladivostok
Vladivostok ( ; , ) is the largest city and the administrative center of Primorsky Krai and the capital of the Far Eastern Federal District of Russia. It is located around the Zolotoy Rog, Golden Horn Bay on the Sea of Japan, covering an area of , with a population of 603,519 residents Vladivostok is the second-largest city in the Far Eastern Federal District, as well as the Russian Far East, after Khabarovsk. It is located approximately from the China–Russia border and from the North Korea–Russia border. What is now Vladivostok was part of Outer Manchuria. Shortly after the signing of the Treaty of Aigun between Qing China and the Russian Empire and affirmed by the Convention of Peking – from which it is also known as the Amur Annexation – the city was founded as a Russian military outpost on July 2, 1860. In 1872, the main Russian naval base on the Pacific Ocean was transferred to the city, stimulating its growth. In 1914 the city experienced rapid growth economical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Askold Island
Askold and Dir (''Haskuldr'' or ''Hǫskuldr'' and ''Dyr'' or ''Djur'' in Old Norse; died in 882), mentioned in both the ''Primary Chronicle'', the ''Novgorod First Chronicle'', and the ''Nikon Chronicle'', were the earliest known rulers of Kiev. The name Askold Askold Also — ''Oskold'', ''Oskol'd'', ''Oskolod''. (''Осколд'', ''Оскольд'', ''Осколод'') There are several versions of the origin of the name Askold. The most likely version interprets it as the Norse name Haskuldr or Höskuldr. However, the spelling Askold may only be a change in the Scandinavian manner (similar to Vytautas – Vitold)." According to professor Igor Danilevsky, who is a specialist on the history of Kievan Rus, the Scandinavian origin of the name is certain and it has long been proved. G. Magner defended the theory of the Slavic origin of the name, deriving it from the word "skoldyryt" – to accumulate. Other supporters of the theory of Slavic origin saw in the word the ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synonym (taxonomy)
In taxonomy, the scientific classification of living organisms, a synonym is an alternative scientific name for the accepted scientific name of a taxon. The Botanical nomenclature, botanical and Zoological nomenclature, zoological codes of nomenclature treat the concept of synonymy differently. * In nomenclature, botanical nomenclature, a synonym is a Binomial nomenclature, scientific name that applies to a taxon that now goes by a different scientific name. For example, Carl Linnaeus, Linnaeus was the first to give a scientific name (under the currently used system of scientific nomenclature) to the Norway spruce, which he called ''Pinus abies''. This name is no longer in use, so it is now a synonym of the current scientific name, ''Picea abies''. * In zoology, moving a species from one genus to another results in a different Binomial nomenclature, binomen, but the name is considered an alternative combination rather than a synonym. The concept of synonymy in zoology is reserved f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
