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Boris Bychowsky
Boris Yevseyevich Bychowsky (Борис Евсеевич Быховский, 27 August 1908 – 26 January 1974) was a Soviet scientist and parasitologist, specialist of fish parasites, especially monogeneans. He was director of the Institute of Zoology of the Academy of Sciences of the Soviet Union in Leningrad (1962–1974). Bychowsky is the author of more than 100 scientific publications, mostly on systematics of monogeneans. His most famous work was his monography on monogeneans (1957), which was translated into English in 1961. Education *1930: graduated from the biology department of Physics and Mathematics Faculty of Leningrad State University *1935: PhD in biological sciences *1956: Habilitation in biological sciences Career *1929–1935: Laboratory of fish diseases Institute of Fisheries (Leningrad); *1935–1940: Zoological Institute of the Academy of Sciences of the Soviet Union *1940–1944: Deputy Chairman of the Presidium of the Tajikistan Branch of the Academy of S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg
Saint Petersburg ( rus, links=no, Санкт-Петербург, a=Ru-Sankt Peterburg Leningrad Petrograd Piter.ogg, r=Sankt-Peterburg, p=ˈsankt pʲɪtʲɪrˈburk), formerly known as Petrograd (1914–1924) and later Leningrad (1924–1991), is the List of cities and towns in Russia by population, second-largest city in Russia. It is situated on the Neva River, at the head of the Gulf of Finland on the Baltic Sea, with a population of roughly 5.4 million residents. Saint Petersburg is the List of European cities by population within city limits, fourth-most populous city in Europe after Istanbul, Moscow and London, the List of cities and towns around the Baltic Sea, most populous city on the Baltic Sea, and the world's List of northernmost items#Cities and settlements, northernmost city of more than 1 million residents. As Russia's Imperial capital, and a Ports of the Baltic Sea, historically strategic port, it is governed as a Federal cities of Russia, federal city. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monogenea 120 Page 011 Bychowskicotyle Plectorhynchi Lebedev, 1969
Monogeneans are a group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish. They have a direct lifecycle and do not require an intermediate host. Adults are hermaphrodites, meaning they have both male and female reproductive structures.L.A. Tubbsa et al. (2005). "Effects of temperature on fecundity in vitro, egg hatching and reproductive development of ''Benedenia seriolae'' and ''Zeuxapta seriolae'' (Monogenea) parasitic on yellowtail kingfish Seriola lalandi". ''International Journal for Parasitology''(35), 315–327. Some monogeneans are oviparous (egg-laying) and some are viviparous (live-bearing). Oviparous varieties release eggs into the water. Viviparous varieties release larvae, which immediately attach to another host. The genus ''Gyrodactylus'' is an example of a viviparous variety, while the genus ''Dactylogyrus'' is an example of an oviparous variety. Signs and symptoms Freshwater fish that become infected with this parasite become leth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1908 Births
Nineteen or 19 may refer to: * 19 (number), the natural number following 18 and preceding 20 * one of the years 19 BC, AD 19, 1919, 2019 Films * ''19'' (film), a 2001 Japanese film * ''Nineteen'' (film), a 1987 science fiction film Music * 19 (band), a Japanese pop music duo Albums * ''19'' (Adele album), 2008 * ''19'', a 2003 album by Alsou * ''19'', a 2006 album by Evan Yo * ''19'', a 2018 album by MHD * ''19'', one half of the double album '' 63/19'' by Kool A.D. * '' Number Nineteen'', a 1971 album by American jazz pianist Mal Waldron * ''XIX'' (EP), a 2019 EP by 1the9 Songs * "19" (song), a 1985 song by British musician Paul Hardcastle. * "Nineteen", a song by Bad4Good from the 1992 album ''Refugee'' * "Nineteen", a song by Karma to Burn from the 2001 album ''Almost Heathen''. * "Nineteen" (song), a 2007 song by American singer Billy Ray Cyrus. * "Nineteen", a song by Tegan and Sara from the 2007 album '' The Con''. * "XIX" (song), a 2014 song by S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratopogonidae
Ceratopogonidae is a family of flies commonly known as no-see-ums, or biting midges, generally in length. The family includes more than 5,000 species, distributed worldwide, apart from the Antarctic and the Arctic. Ceratopogonidae are holometabolous, meaning their development includes four life stages: egg, larva, pupa, and imago or adult. Most common species in warmer climates will take about two to six weeks to complete a life cycle. Both adult males and females feed on nectar. Most females also feed on the blood of vertebrates, including humans, to get protein for egg-laying. Their bites are painful, and can cause intensely itchy lesions. Their mouthparts are well-developed for cutting the skin of their hosts. Some species prey on other insects. Larvae need moisture to develop, but also air and food. They are not strictly aquatic or terrestrial. Some species within the biting midges are thought to be predatory on other small insects. Particularly mosquito larvae have bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsporidia
Microsporidia are a group of spore-forming unicellular parasites. These spores contain an extrusion apparatus that has a coiled polar tube ending in an anchoring disc at the apical part of the spore. They were once considered protozoans or protists, but are now known to be fungi, or a sister group to fungi. These fungal microbes are obligate eukaryotic parasites that use a unique mechanism to infect host cells. They have recently been discovered in a 2017 Cornell study to infect Coleoptera on a large scale. So far, about 1500 of the probably more than one million species are named. Microsporidia are restricted to animal hosts, and all major groups of animals host microsporidia. Most infect insects, but they are also responsible for common diseases of crustaceans and fish. The named species of microsporidia usually infect one host species or a group of closely related taxa. Approximately 10 percent of the species are parasites of vertebrates —several species, most of whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexandr Vladimirovich Gussev
Alexandr Vladimirovich Gussev (Александр Владимирович Гусев, 5 July 1917 – 31 December 1999), sometimes spelled Gusev in the literature, was a Russian helminthologist specialist of monogeneans. Gussev was a student of the soviet parasitologist V. A. Dogiel. He worked at the Zoological Institute in Leningrad, then Saint Petersburg, Russia. He received his PhD in 1953 and his DrSc in 1973. Gussev wrote more than 220 publications, dealing with systematics, faunistics, morphology, development, biology and zoogeography of fish parasites. Gussev is mainly known for his work on the Monogenea, a group of Platyhelminthes parasitic on freshwater and marine fish. He was one of the world leader in this field and described more than 200 new species of monogeneans. He also authored a handbook on methods of collecting monogeneans. Honours * Certificate of Honour from the Preasidium of the Academy of Sciences of the USSR * Honorary member of the American Soc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepod
Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have parasitic phases, and some continental species may live in limnoterrestrial habitats and other wet terrestrial places, such as swamps, under leaf fall in wet forests, bogs, springs, ephemeral ponds, and puddles, damp moss, or water-filled recesses (phytotelmata) of plants such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the adult and then, after more molts, achieves adult development. The nauplius form is so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopoda
Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are grazers, or filter feeders, a few are predators, and some are internal or external parasites, mostly of fish. Aquatic species mostly live on the seabed or bottom of freshwater bodies of water, but some taxa can swim for a short distance. Terrestrial forms move around by crawling and tend to be found in cool, moist places. Some species are able to roll themselves into a ball as a defense mechanism or to conserve moisture. There are over 10,000 identified species of isopod worldwide, with around ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digenea
Digenea (Gr. ''Dis'' – double, ''Genos'' – race) is a class of trematodes in the Platyhelminthes phylum, consisting of parasitic flatworms (known as ''flukes'') with a syncytial tegument and, usually, two suckers, one ventral and one oral. Adults commonly live within the digestive tract, but occur throughout the organ systems of all classes of vertebrates. Once thought to be related to the Monogenea, it is now recognised that they are closest to the Aspidogastrea and that the Monogenea are more closely allied with the Cestoda. Around 6,000 species have been described to date. Morphology Key features Characteristic features of the Digenea include a syncytial tegument; that is, a tegument where the junctions between cells are broken down and a single continuous cytoplasm surrounds the entire animal. A similar tegument is found in other members of the Neodermata; a group of platyhelminths comprising the Digenea, Aspidogastrea, Monogenea and Cestoda. Digeneans posses ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexicana (Monogenea)
''Mexicana'' is a genus of monogeneans belonging to the family Ancyrocephalidae.WoRMS (2018). Mexicana Caballero & Bravo-Hollis, 1959. Accessed at: http://marinespecies.org/aphia.php?p=taxdetails&id=518845 on 2018-08-13 All members of the genus are parasitic on fish. Species The following species are considered valid according to WorRMS: * '' Mexicana anisotremum'' Cezar, Paschoal & Luque, 2012 * '' Mexicana atlantica'' Luque, Amato & Takemoto, 1992 * '' Mexicana bychowskyi'' Caballero & Bravo-Hollis, 1959 * '' Mexicana iannaconi'' Chero, Cruces, Sáez & Alvariño, 2014 Chero, J., Cruces, C., Sáez, G., & Alvariño, L. (2014). ''Mexicana iannaconi'' n. sp. (Monogenea: Ancyrocephalidae) parasite of Chere-Chere Grunt ''Haemulon steindachneri'' (Jordan & Gilbert, 1882)(Perciformes: Haemulidae) from the Peruvian Coast. Neotropical Helminthology, 8(2), 429-438. * ''Mexicana littoralis Mexicana may refer to: * a woman born in Mexico * Mexicana de Aviación, a former airline of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delane C (1817–1879), editor of The Times (London), born in London
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Delane may refer to: * DeLane Fitzgerald, American football coach in the United States *DeLane Matthews (born 1961), American actress * Dennis Delane (died 1750), Irish actor *John Thadeus Delane John Thadeus Delane (11 October 1817 – 22 November 1879), editor of ''The Times'' (London), was born in London. He was the second son of W.F.A. Delane, a barrister, of an old Irish family, who about 1832 was appointed by ''Times'' publi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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