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Bothriocephalus Acheilognathi
''Bothriocephalus acheilognathi'', also known as the Asian tapeworm, is a freshwater fish parasite that originated from China and Eastern Russia. It is a generalized parasite that affects a wide variety of fish host (biology), hosts, particularly cyprinids, contributing to its overall success. Description ''B. acheilognathi'' has a fleshy scolex (head region) with an undeveloped terminal disc and two long attachment grooves called bothria positioned dorsoventrally. The scolex is distinctively shaped like an inverted heart or an arrowhead. Its ribbon-like body consists of flattened segments called proglottids. It typically grows to a length of with widths of up to , but exceedingly large specimens reaching have been recorded. They are remarkable in their ability to adapt their sizes depending on the size of their hosts. Taxonomy ''Bothriocephalus acheilognathi'' has more than twenty known synonym (taxonomy), synonyms. It was originally described as three species, all of them fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the Biology, biological Kingdom (biology), kingdom Animalia (). With few exceptions, animals heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, have myocytes and are motility, able to move, can reproduce sexually, and grow from a hollow sphere of Cell (biology), cells, the blastula, during embryonic development. Animals form a clade, meaning that they arose from a single common ancestor. Over 1.5 million extant taxon, living animal species have been species description, described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from to . They have complex ecologies and biological interaction, interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders of Russia, land borders with fourteen countries. Russia is the List of European countries by population, most populous country in Europe and the List of countries and dependencies by population, ninth-most populous country in the world. It is a Urbanization by sovereign state, highly urbanised country, with sixteen of its urban areas having more than 1 million inhabitants. Moscow, the List of metropolitan areas in Europe, most populous metropolitan area in Europe, is the capital and List of cities and towns in Russia by population, largest city of Russia, while Saint Petersburg is its second-largest city and Society and culture in Saint Petersburg, cultural centre. Human settlement on the territory of modern Russia dates back to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carassius Carassius
The crucian carp (''Carassius carassius'') is a medium-sized member of the common carp family Cyprinidae. It occurs widely in northern European regions. Its name derives from the Low German ''karusse'' or ''karutze'', possibly from Medieval Latin ''coracinus'' (a kind of river fish). Distribution The crucian carp is a widely distributed European species, its range spanning from England to Russia; it is found as far north as the Arctic Circle in the Scandinavian countries, and as far south as central France and the region of the Black Sea. Its habitat includes lakes, ponds, and slow-moving rivers. It has been established that the fish is native to England and not introduced. The crucian carp is a medium-sized cyprinid, typically in body length, and rarely exceeds in weight over , but a maximum total length of has been reported for a male,Koli, L. 1990 Suomen kalat. ishes of Finland Werner Söderström Osakeyhtiö. Helsinki. 357 p. (in Finnish). Fishbase Ref. 6114 and the heav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Profundulus Portillorum
''Profundulus'' is a genus of fish in the family Profundulidae endemic to Mexico and northern Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually .... It was regarded as the only genus in the Profundulidae but workers have split the genus and raised a second genus '' Tlaloc''. Species These are the currently recognized species in this genus: * '' Profundulus adani'' Sara E. Dominguez-Cisneros, 2021 * '' Profundulus balsanus'' C. G. E. Ahl, 1935 (Balsas killifish) Jamangapé O, J.A., Velázquez-Velázquez, E., Martínez-Ramirez, E., Anzueto-Calvo, M.J., Gomez, E.L., Dominguez-Cisneros, S.E., McMahan, C.D. & Matamoros, W.A. (2016)Validity and Redescription of ''Profundulus balsanus'' Ahl, 1935 (Cyprinodontiformes: Profundulidae).''Zootaxa, 4173 (1): 55–65.'' * '' Prof ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plagopterus Argentissimus
The woundfin (''Plagopterus argentissimus'') ray-finned fish in the family Leuciscidae. This fish is endemic to the Virgin River of the southwestern United States. It is the only species in the monotypic genus ''Plagopterus''. Description The woundfin is a small slender, silvery minnow, with a flattened head and belly, long snout, leathery skin, and no scales. There are barbels on the corners of its lips, and its common name likely comes from the first spinous ray of its dorsal fin, which is sharp-pointed. Its maximum length is rarely more than ."''Plagopterus argentissimus''" Arizona Game and Fish Department. 2001. Retrieved on July 16, 2006. It can be distinguished from spikedace and spinedace by presence of barbels. Distribution Historically, the woundfin occupied much of the ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gila Robusta Seminuda
The roundtail chub (''Gila robusta'') is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, chubs, Eurasian minnows and related species. This species is found in southwestern North America. It is native to the Colorado River drainage basin, including the Gila River and other tributaries, and in several other rivers. It is part of the "''robusta'' complex", which includes the ''Gila robusta robusta'', ''G.r. grahami'', and ''G.r. seminuda''. Evolution A partial articulated fossil skeleton of a ''Gila'' chub, tentatively assigned to ''Gila robusta'', has been recovered from the middle Pliocene-aged Bidahochi Formation of Arizona. This suggests that the Colorado River had already developed its iconic swift-river habitat by this point in time. Description The body of the roundtail chub is significantly larger forward of the dorsal fin, and posteriorly it is tapered towards the tail. The forehead area is concave. The mouth is l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphateles Bicolor Mohavensis
The Mohave tui chub (''Siphaletes bicolor mohavensis'') is a subspecies of the tui chub endemic to the Mojave River. The Mohave tui chub was listed as endangered under the Endangered Species Act in 1970, then added to California's list of endangered species in 1971. A recovery plan was created by the United States Fish and Wildlife Service in 1984. Description Adult Mohave tui chubs' standard length ranges from However, some adults can reach or longer. They have a thick body and short, rounded fins. These fish have a brown to dark olive colored back and blueish white to silver belly. The species does not demonstrate sexual dimorphism. Females spawn from February to October and lay between 4,000 and 50,000 eggs that stick to aquatic vegetation. Mohave tui chubs are adapted to survive the Mojave River's alkaline water, low oxygen levels, and high water temperatures. Adults are solitary and inhabit deeper waters. Mohave tui chubs subsist on insect larvae, small fish, and detritus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gila Cypha
The humpback chub (''Gila cypha'') is a federally protected fish that lived originally in fast waters of the Colorado River system in the United States. This species takes its name from the prominent hump between the head and dorsal fin, which is thought to direct the flow of water over the body and help maintain body position in the swift currents of the Colorado river. The body is almost entirely scaleless, retaining only about 80 mid-lateral scales along the lateral line. The fish is very streamlined, with a thin caudal peduncle and a deeply forked tail. The back is a light olive gray, the sides silver, and the belly white. The dorsal fin usually has nine rays, and the anal fin 10 or more. Maximum recorded length is 38 cm. The humpback chub mostly consumes invertebrates and, to a lesser extent, other fish. They feed at all levels from the bottom to the surface. The species spawns from April through June, at water temperatures of . The males develop nuptial tubercles on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procercoid
The procercoid is the second larval stage of some tapeworms, which typically develops inside of copepods following their ingestion of the coracidium parasite structure that contains the larval oncosphere. The flatworm in this stage is not enclosed in a protective cyst, but is infectious to the next intermediate host. Procercoids resemble their adult forms in pathways of energy metabolism. They are basically anaerobic, lacking a complete Krebs cycle, and rely on glycolysis. See also *Plerocercoid ''Plerocercoid'' refers to last larval form, the infective form, found in the second intermediate host of many Cestoda Cestoda is a class of parasitic worms in the flatworm phylum (Platyhelminthes). Most of the species—and the best-known� ..., the last larval stage References {{reflist Larvae Cestoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eleotridae
Eleotridae is a family of fish commonly known as sleeper gobies, with about 34 genera and 180 species. Most species are found in the tropical Indo-Pacific region, but there are also species in subtropical and temperate regions, warmer parts of the Americas and near the Atlantic coast in Africa. While many eleotrids pass through a planktonic stage in the sea and some spend their entire lives in the sea; as adults, the majority live in freshwater streams and brackish water. One of its genera, '' Caecieleotris'', is troglobitic. They are especially important as predators in the freshwater stream ecosystems on oceanic islands such as New Zealand and Hawaii that otherwise lack the predatory fish families typical of nearby continents, such as catfish. Anatomically, they are similar to the gobies (Gobiidae), though unlike the majority of gobies, they do not have a pelvic sucker.Helfman, G.S., Collette, B.B. & Facey, D.E. (1997): ''The Diversity of Fishes''. Wiley-Blackwell Publishing. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centrarchidae
Centrarchidae, better known as sunfishes or centrarchids, is a family of freshwater ray-finned fish belonging to the order Centrarchiformes, native only to North America. There are eight universally included genera within the centrarchid family: '' Lepomis'' (true sunfishes), '' Micropterus'' (black basses), ''Pomoxis'' ( crappies), '' Enneacanthus'' (banded sunfishes), ''Centrarchus'' ( type genus, consisting solely of the flier ''C. macropterus''), ''Archoplites'' ( Sacramento perch), '' Ambloplites'' (rock basses), and ''Acantharchus'' ( mud sunfish). Their closest relatives are the pygmy sunfishes of the family Elassomatidae, which are sometimes placed in the same family, although presently treated as distinct. The centrarchid family comprises 38 identified species, 34 of which are extant. It includes many popular game fishes familiar to North American anglers, such as the rock bass, largemouth bass, bluegill, pumpkinseed, green sunfish and crappies. Most sunfish a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cichlidae
Cichlids () are a large, diverse, and widespread family of percomorph fish in the family Cichlidae, order Cichliformes. At least 1,760 species have been scientifically described, making it one of the largest vertebrate families, with only the Cyprinidae being more speciose. New species are discovered annually, and many species remain undescribed. The actual number of species is therefore unknown, with estimates varying between 2,000 and 3,000. They are native to the Neotropics, Africa (including Madagascar), the Middle East, and the Indian subcontinent, although some species have been introduced worldwide. Many cichlids, particularly tilapia, are important food fishes, while others, such as the '' Cichla'' species, are valued game fish. The family also includes many popular freshwater aquarium fish kept by hobbyists, including the angelfish, oscars, and discus. Cichlids have the largest number of endangered species among vertebrate families, most in the haplochrom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
