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Boris Bychowsky
Boris Yevseyevich Bychowsky (Борис Евсеевич Быховский, 27 August 1908 – 26 January 1974) was a Soviet scientist and Parasitology, parasitologist, specialist of fish parasites, especially monogeneans. He was director of the Zoological Museum of the Zoological Institute of the Russian Academy of Sciences, Institute of Zoology of the Academy of Sciences of the Soviet Union in Saint Petersburg, 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 Saint Petersburg State University, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg
Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland on the Baltic Sea. The city had a population of 5,601,911 residents as of 2021, with more than 6.4 million people living in the Saint Petersburg metropolitan area, metropolitan area. Saint Petersburg is the List of European cities by population within city limits, fourth-most populous city in Europe, 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 the former capital of the Russian Empire, and a Ports of the Baltic Sea, historically strategic port, it is governed as a Federal cities of Russia, federal city. The city was founded by Tsar Peter the Great on 27 May 1703 on the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monogenea 120 Page 011 Bychowskicotyle Plectorhynchi Lebedev, 1969
Monogeneans, members of the class Monogenea, 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 infect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1908 Births
This is the longest year in either the Julian or Gregorian calendars, having a duration of 31622401.38 seconds of Terrestrial Time (or ephemeris time), measured according to the definition of mean solar time. Events January * January 1 – The British ''Nimrod'' Expedition led by Ernest Shackleton sets sail from New Zealand on the ''Nimrod'' for Antarctica. * January 3 – A total solar eclipse is visible in the Pacific Ocean and is the 46th solar eclipse of Solar Saros 130. * January 13 – A fire breaks out at the Rhoads Opera House in Boyertown, Pennsylvania, killing 171 people. * January 15 – Alpha Kappa Alpha, the first race inclusive sorority is founded on the campus of Howard University in Washington, D.C. * January 24 – Robert Baden-Powell's '' Scouting for Boys'' begins publication in London. The book eventually sells over 100 million copies, and effectively begins the worldwide Boy Scout movement. February * February 1 – Lisbon Regicide: Ki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratopogonidae
Ceratopogonidae is a family of flies commonly known as no-see-ums, sand flies or biting midges, generally in length. The family includes more than 5,000 species, distributed worldwide, apart from the Antarctic and the Arctic. A 2025 study from Oxford University lists the subspecies Ceratopogonidae midges as "the most widely recognised and best-studied cocoa pollinators." 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 due to the body producing histamines against the proteins from the midges' saliva. Their mouthparts are well-developed for cutting the skin of their hosts. Some species pre ... [...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.Franzen, C. (2005). How do Microsporidia invade cells?. Folia Parasitologica, 52(1–2), 36–40. doi.org/10.14411/fp.2005.005 They were once considered protozoans or protists, but are now known to be fungi, or a sister group to true 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 (beetles) 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 ... [...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, fauna, faunistics, Morphology (biology), morphology, Developmental biology, 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 t ... [...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 (ecology), habitat. Some species are planktonic (living in the water column), some are benthos, benthic (living on the sediments), several species have Parasitism, 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, puddles, damp moss, or water-filled recesses of plants (phytotelmata) such as bromeliads and pitcher plants. Many live underground in marine and freshwater caves, sinkholes, or stream beds. Copepods are sometimes used as Ecological indicator, biodiversity indicators. As with other crustaceans, copepods have a larval form. For copepods, the egg hatches into a Crustacean larvae#Nauplius, nauplius form, with a head and a tail but no true thorax or abdomen. The larva molts several times until it resembles the a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopoda
Isopoda is an order of crustaceans. Members of this group are called isopods and include both aquatic species and terrestrial species such as woodlice. 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 called the marsupium. 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 the bottom of freshwater bodies of water, but some taxa can swim for 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 like species in the family Armadilli ... [...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 possess a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexicana (flatworm)
''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 Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The ent ... 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delane C
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 (1817–1879), editor of ''The Times ''The Times'' is a British Newspaper#Daily, daily Newspaper#National, national newspaper based in London. It began in 1785 under the title ''The Daily Universal Register'', adopting its modern name on 1 January 1788. ''The Times'' and its si ...'' (London), born in London * Mansoor Delane (born 2003), American football player {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour, or ecological niche. In addition, palaeontologists 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. About 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomen". The first part of a binomen is the name of a genus to which the species belongs. The second part is called the specific name (zoology), specific name or the specific ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
