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Leo Margolis
Leo Margolis, (December 18, 1927 – January 13, 1997) was a Canadian parasitologist. He was a pioneer in the use of parasites for identification of Pacific Ocean fish stocks. His discoveries became a crucial point in negotiations over pacific salmon fisheries, as it could now be determined where each individual fish spawned, in the rivers of Canada or the United States. Born in Montreal, Quebec, he received a B.Sc. in 1948, a M.Sc. in 1950, and a Ph.D in 1952 from McGill University. He joined the Pacific Biological Station in Nanaimo, British Columbia, where was a government scientist, advisor, and diplomatic representative. He became Head of the Fish Health and Parasitology Section of the Station in 1967 and was appointed Senior Scientist in 1990. He suffered a heart attack in 1997 while walking home from work and died several days later, at the age of 69, after being airlifted to a Vancouver hospital. Research Margolis published a number of papers on fish parasites, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montreal
Montreal ( ; officially Montréal, ) is the List of the largest municipalities in Canada by population, second-most populous city in Canada and List of towns in Quebec, most populous city in the Provinces and territories of Canada, Canadian province of Quebec. Founded in 1642 as ''Fort Ville-Marie, Ville-Marie'', or "City of Mary", it is named after Mount Royal, the triple-peaked hill around which the early city of Ville-Marie is built. The city is centred on the Island of Montreal, which obtained its name from the same origin as the city, and a few much smaller peripheral islands, the largest of which is Île Bizard. The city is east of the national capital Ottawa, and southwest of the provincial capital, Quebec City. As of 2021, the city had a population of 1,762,949, and a Census Metropolitan Area#Census metropolitan areas, metropolitan population of 4,291,732, making it the List of the largest municipalities in Canada by population, second-largest city, and List of cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margolisia
''Margolisia'' is a genus of trematodes in the family Opecoelidae Opecoelidae is a family of trematodes. It is the largest digenean family with over 90 genera and nearly 900 species, almost solely found in marine and freshwater teleost fishes.Bray, Rodney A., Cribb, Thomas H., Littlewood, D. Timothy J. & Waesch .... It consists of one species, ''Margolisia vidalensis'' Bray, 1987. References Opecoelidae Plagiorchiida genera Monotypic protostome genera {{trematoda-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthochondria Margolisi
''Acanthochondria'' is a genus of copepods, containing the following species: *'' Acanthochondria alatalongicollis'' Heegaard, 1940 *'' Acanthochondria alleni'' Tang, Kalman & Ho, 2010 *'' Acanthochondria bicornis'' Shiino, 1955 *'' Acanthochondria brevicorpa'' Yü, 1935 *'' Acanthochondria clavata'' (Bassett-Smith, 1896) *'' Acanthochondria constricta'' Shiino, 1955 *'' Acanthochondria cornuta'' (O. F. Müller, 1776) *'' Acanthochondria cyclopsetta'' Pearse, 1952 *'' Acanthochondria dilatata'' Shiino, 1955 *'' Acanthochondria dojirii'' Kabata, 1984 *'' Acanthochondria elongata'' (Bassett-Smith, 1898) *'' Acanthochondria epachthes'' (C. B. Wilson, 1908) *'' Acanthochondria eptatreti'' (Chen, Luo, Dai & Shih, 2014) *'' Acanthochondria exilipes'' C. B. Wilson, 1932 *'' Acanthochondria fissicauda'' Shiino, 1955 *'' Acanthochondria fraseri'' Ho, 1972 *'' Acanthochondria galerita'' (Rathbun, 1886) *'' Acanthochondria glandiceps'' Shiino, 1955 *'' Acanthochondria helicoleni'' Cantatore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allopodocotyle Margolisi
''Allopodocotyle'' is a genus of trematodes in the family Opecoelidae. Species *'' Allopodocotyle argyropsi'' Madhavi, 1975Madhavi, R. (1975). Digenetic trematodes from marine fishes of Waltair coast, Bay of Bengal. Family Opecoelidae. ''Rivista di Parassitologia'', 36, 153–164. *'' Allopodocotyle atzi'' (Nigrelli, 1939) Pritchard, 1966Nigrelli, R. F. (1939). Two new species of trematodes from the deep sea scorpion fish, ''Scorpaena madurensis'' Cuv. & Val. ''Zoologica, New York'', 25, 263–269. *'' Allopodocotyle enkaimushi'' Blend, Kuramochi & Dronen, 2015Blend, C., Kuramochi, T. & Dronen, N. (2015). Re-evaluation of ''Tellervotrema katadara'' (Kuramochi, 2001) Kuramochi, 2009 (Opecoelidae: Plagioporinae) and supplementary morphological data for ''T. beringi'' (Mamaev, 1965) Gibson & Bray, 1982 with new host and locality. ''Zootaxa'', 3986(4), 435–451. *'' Allopodocotyle epinepheli'' (Yamaguti, 1942) Pritchard, 1966Yamaguti, S. (1942). Studies on the helminth fauna of Japan. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of 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 produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, 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 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 specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lernaeopodidae
Lernaeopodidae is a family of parasitic copepods. The females are typically large and fleshy, and attach to the host permanently using a plug made of chitin Chitin ( C8 H13 O5 N)n ( ) is a long-chain polymer of ''N''-acetylglucosamine, an amide derivative of glucose. Chitin is probably the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chit ... called the ''bulla''. The males cling on to the females using their antennae. They parasitize both marine and freshwater fish. Some lernaeopodids, including '' Clavella'' and '' Salmincola'', can have negative impacts on fish in aquaculture. Genera The family contains the following genera: * '' Acespadia'' Leigh-Sharpe, 1933 * '' Achtheres'' Nordmann, 1832 * '' Alella'' Leigh-Sharpe, 1925 * '' Anaclavella'' Heegaard, 1940 * '' Basanistes'' Nordmann, 1832 * '' Brachiella'' Cuvier, 1830 * '' Brianella'' Wilson C.B., 1915 * '' Brianellinae'' Wilson C.B., 1915 * '' Cauloxenus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copepoda
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] |
Philometridae
Philometridae is a family of nematodes belonging to the order Rhabditida. All Philometridae are obligate tissue parasites of fish. Life cycle Philometridae cycle between two hosts: Cyclopoida (small crustaceans) as an intermediate host, and various fish as a definitive host. First-stage larvae are ejected into the water, and develop to the third stage if they're eaten by a cyclopoid. Once the copepod is eaten by a fish, the larvae develop into adults and mate. Pregnant females migrate to a final site just under the fish's skin, in the swim bladder, or in the coelom; males die soon after mating and in many Philometridae species they have never been described. Genera * '' Afrophilometra'' Moravec, Charo-Karisa & Jirků, 2009 *Alinema Rasheed, 1963 *Barracudia Moravec & Shamsi, 2017 *Buckleyella Rasheed, 1963 *Caranginema Moravec, Montoya-Mendoza & Salgado-Maldonado, 2008 *Clavinema Yamaguti, 1935 *Clavinemoides Moravec, Khosheghbal & Pazooki, 2013 *Congerinema Moravec, Nagasawa, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nematoda
The nematodes ( or grc-gre, Νηματώδη; la, Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments. Less formally, they are categorized as Helminths, but are taxonomically classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa, and unlike flatworms, have tubular digestive systems with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species described to date vary by author and may change rapidly over time. A 2013 survey of animal biodiversity published in the mega jou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
