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Urbain-Louis-Eugène Léger
Urbain-Louis-Eugène Léger (7 September 1866 – 7 July 1948) was a French zoologist who was a specialist on aquatic protists, fish parasites, and fish farming. He served as a professor of zoology at Grenoble. Léger was born in Loches, son of a school teacher. He grew up in Touraine and went to the University of Poitiers where he studied under Aimé Schneider, receiving a doctorate for studies on gregarines. He then worked in Marseilles and studied medicine, receiving a medical degree in 1895 for studies on arteries in the aged. He became a lecturer at Grenoble in 1898 and became a full professor in 1904. Léger's researches included work on the Gregarinida in collaboration with Octave Duboscq. He also studied the life-history of Cnidospora, flagellates, trichomycetes, and ciliates. He also studied the fishes of the Dauphiné The Dauphiné ( , , ; or ; or ), formerly known in English as Dauphiny, is a former province in southeastern France, whose area roughly correspond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Farming
Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture, which is the controlled cultivation and harvesting of aquatic animals such as fish, crustaceans, molluscs and so on, in natural or pseudo-natural environments. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. Worldwide, the most important fish species produced in fish farming are carp, catfish, salmon and tilapia. Global demand is increasing for dietary fish protein, which has resulted in widespread overfishing in wild fisheries, resulting in significant decrease in fish stocks and even complete depletion in some regions. Fish farming allows establishment of artificial fish colonies that are provided with sufficient feeding, protection from natural predators and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flagellate
A flagellate is a cell or organism with one or more whip-like appendages called flagella. The word ''flagellate'' also describes a particular construction (or level of organization) characteristic of many prokaryotes and eukaryotes and their means of motion. The term presently does not imply any specific relationship or classification of the organisms that possess flagella. However, several derivations of the term "flagellate" (such as " dinoflagellate" and " choanoflagellate") are more formally characterized. Form and behavior Flagella in eukaryotes are supported by microtubules in a characteristic arrangement, with nine fused pairs surrounding two central singlets. These arise from a basal body. In some flagellates, flagella direct food into a cytostome or mouth, where food is ingested. Flagella role in classifying eukaryotes. Among protoctists and microscopic animals, a flagellate is an organism with one or more flagella. Some cells in other animals may be flage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1948 Deaths
Events January * January 1 ** The General Agreement on Tariffs and Trade (GATT) is inaugurated. ** The current Constitutions of Italy and of New Jersey (both later subject to amendment) go into effect. ** The railways of Britain are nationalized, to form British Railways. * January 4 – Burma gains its independence from the United Kingdom, becoming an independent republic, named the ' Union of Burma', with Sao Shwe Thaik as its first President and U Nu its first Prime Minister. * January 5 – In the United States: ** Warner Brothers shows the first color newsreel ('' Tournament of Roses Parade'' and the '' Rose Bowl Game''). ** The first Kinsey Report, ''Sexual Behavior in the Human Male'', is published. * January 7 – Mantell UFO incident: Kentucky Air National Guard pilot Thomas Mantell crashes while in pursuit of an unidentified flying object. * January 12 – Mahatma Gandhi begins his fast-unto-death in Delhi, to stop communal violenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1866 Births
Events January * January 1 ** Fisk University, a historically black university, is established in Nashville, Tennessee. ** The last issue of the abolitionist magazine '' The Liberator'' is published. * January 6 – Ottoman troops clash with supporters of Maronite leader Youssef Bey Karam, at St. Doumit in Lebanon; the Ottomans are defeated. * January 12 ** The '' Royal Aeronautical Society'' is formed as ''The Aeronautical Society of Great Britain'' in London, the world's oldest such society. ** British auxiliary steamer sinks in a storm in the Bay of Biscay, on passage from the Thames to Australia, with the loss of 244 people, and only 19 survivors. * January 18 – Wesley College, Melbourne, is established. * January 26 – Volcanic eruption in the Santorini caldera begins. February * February 7 – Battle of Abtao: A Spanish naval squadron fights a combined Peruvian-Chilean fleet, at the island of Abtao, in the Chiloé Archipelago of southern Chile. * February 13 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dauphiné
The Dauphiné ( , , ; or ; or ), formerly known in English as Dauphiny, is a former province in southeastern France, whose area roughly corresponded to that of the present departments of Isère, Drôme and Hautes-Alpes. The Dauphiné was originally the Dauphiné of Viennois. In the 12th century, the local ruler Count Guigues IV of Albon (–1142) bore a dolphin on his coat of arms and was nicknamed (French for 'dolphin'). His descendants changed their title from Count of Albon to Dauphin of Viennois. The state took the name of Dauphiné. It became a state of the Holy Roman Empire in the 11th century. In 1349, the Dauphiné was transferred from the last non-royal Dauphin (who had great debts and no direct heir) to the future king of France, Charles V, through the purchase of lands. The terms of the transfer stipulated that the heir apparent of France would henceforth be called and included significant autonomy and tax exemption for the Dauphiné region, most of which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ciliate
The ciliates are a group of alveolates characterized by the presence of hair-like organelles called cilia, which are identical in structure to flagellum, eukaryotic flagella, but are in general shorter and present in much larger numbers, with a different wikt:undulating, undulating pattern than flagella. Cilia occur in all members of the group (although the peculiar Suctoria only have them for part of their biological life cycle, life cycle) and are variously used in swimming, crawling, attachment, feeding, and sensation. Ciliates are an important group of protists, common almost anywhere there is water—in lakes, ponds, oceans, rivers, and soils, including anoxic and oxygen-depleted habitats. About 4,500 unique free-living species have been described, and the potential number of extant species is estimated at 27,000–40,000. Included in this number are many Ectosymbiosis, ectosymbiotic and endosymbiotic species, as well as some Obligate parasite, obligate and Facultative paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trichomycetes
Trichomycetes refers to a group of fungi in the division Zygomycota that grow in the guts of arthropods living in aquatic habitats. The name is obsolete, having not been validly published. Species formerly placed in the Trichomycetes are now placed in the orders Harpellales and Asellariales, both in the subdivision Kickxellomycotina, while Amoebidiales and Eccrinales Eccrinales are an order of eukaryotes, previously thought to be zygomycete fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), ... are included in Opisthokonta. References Zygomycota Obsolete fungus taxa {{zygomycota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cnidospora
Cnidospora is a defunct subphylum of microscopic spore-forming parasites in the defunct phylum Protozoa. The subphylum was divided into two classes, the Myxosporidea (now classified as higher-animals, i.e. Metazoa) and the Microsporidea (now classified as fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...). References {{wikispecies Obsolete eukaryote taxa Opisthokont subphyla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grenoble Alpes University
The (, ''Grenoble Alps University'', abbr. UGA) is a ''grand établissement'' in Grenoble, France. Founded in 1339, it is the third largest university in France with about 60,000 students and over 3,000 researchers. Established as the University of Grenoble by Humbert II of Viennois, it split in 1970 following the widespread civil unrest of May 1968. Three of the University of Grenoble's successors—Joseph Fourier University, Pierre Mendès-France University, and Stendhal University—merged in 2016 to restore the original institution under the name . In 2020, the Grenoble Institute of Technology, the Grenoble Institute of Political Studies, and the Grenoble School of Architecture also merged with the original university. The university is organized around two closely located urban campuses: Domaine Universitaire, which straddles Saint-Martin-d'Hères and Gières, and Campus GIANT in Grenoble. UGA also owns and operates facilities in Valence, Chambéry, Les Houches, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octave Duboscq
Octave Joseph Duboscq (30 October 1868, Rouen – 18 February 1943, Nice) was a French zoologist, mycologist and parasitologist. He obtained doctorates in medicine (1894) and sciences (1899) at the University of Caen. From 1904 to 1923, he was chair of zoology at the University of Montpellier, afterwards attaining the chair of marine biology at the University of Paris, Sorbonne. At the same time, he was also named director of the Arago laboratory in Banyuls-sur-Mer, and in 1931 became manager of the biological station at Villefranche-sur-Mer.Pôle Patrimoine scientifique de l'Université Montpellier 2 (biography) He was a member of the ''Belles-Lettres de Montpellier'' (1906–1923) and of the ''Académie des Sciences''. In 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gregarinasina
The gregarines are a group of Apicomplexan alveolates, classified as the Gregarinasina or Gregarinia. The large (roughly half a millimeter) parasites inhabit the intestines of many invertebrates. They are not found in any vertebrates. Gregarines are closely related to both '' Toxoplasma'' and ''Plasmodium'', which cause toxoplasmosis and malaria, respectively. Both protists use protein complexes similar to those that are formed by the gregarines for gliding motility and for invading target cells. This makes the gregarines excellent models for studying gliding motility, with the goal of developing treatment options for both toxoplasmosis and malaria. Thousands of different species of gregarine are expected to be found in insects, and 99% of these gregarine species still need to be described. Each insect species can be the host of multiple gregarine species. One of the most-studied gregarines is '' Gregarina garnhami''. In general, gregarines are regarded as a very successful group ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
