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Ornithoteuthis
''Ornithoteuthis'' is a small genus of squid, with two species, from the family Ommastrephidae, the "flying squids", the two species in this genus are known as "bird squids". They are relatively small squid, with mantle lengths of around 100–200 mm, highly agile and rather uncommon. Their characteristics that distinguish then from other members of the subfamily Ommastrephinae are that their mantle and fins are drawn out into a narrow tail and that they have a luminous stripe along their midline on the viscera. One species, ''Ornithoteuthis antillarum'', is found in the warmer waters of the Atlantic Ocean and the other, ''Ornithoteuthis volatilis'', in similar areas of the Indo-Pacific oceans, they are closely related and are thought to have been a result of relatively recent speciation. The genus contains bioluminescent species. Species There are two species in this genus: *''Ornithoteuthis antillarum'' Adam, 1957 *''Ornithoteuthis volatilis ''Ornithoteuthis volatilis' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithoteuthis Antillarum
''Ornithoteuthis antillarum'', the Atlantic bird squid, is a species of flying squid from the family Ommastrephidae which is found in the warmer waters of the Atlantic Ocean. This species is an important component of the diet of many species of fish and of cetaceans. It is taken as a bycatch in fisheries but has the potential to be commercially important if appropriate fishing methods can be developed. Description ''Ornithoteuthis antillarum'' has a thin, elongated and muscular mantle which ends in a long, thinly-pointed tail. Its fins are also elongated and are arrow shaped, with sharp tips, concave rear margins and convex forward margins. The largest individual recorded had a mantle length of 300 mm and was from the more northerly extremity of the species' distribution. The length of the fins is more than half that of the mantle. Within the mantle cavity there are three visceral photophores, an oval, anal photophore, a posterior intestinal photophore and an elongated pos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithoteuthis Volatilis
''Ornithoteuthis volatilis'', the shiny bird squid, is a squid from the subfamily Ommastrephinae, the flying squids, of the family Ommastrephidae part of the pelagic squid order Oegopsida. It is a tropical and sub-tropical species which is widely distributed in the Indo-Pacific oceans. It is slightly larger than the closely related species '' Ornithoteuthis antillarum'' of the Atlantic Ocean. Description ''Ornithoteuthis volatilis'' has a broad head and it has a very narrow muscular mantle which tapers into a long pointed tail, the head is markedly wider than the mantle. It has long fins which are arrow-shaped and sharply lanceolate towards the tail with the rear edges of the fins being concave. The length of the fins is equal to approximately 55% of the mantle length and the fin width is circa 47% of the mantle length. The first to third arms have at least 50 suckers each while each fourth arm has 75, with the suckers on the second and third arms being larger than those on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ommastrephinae
Ommastrephinae is a subfamily of squids under the family Ommastrephidae. Description Ommastrephinae includes the largest species of squids belonging to the family Ommastrephidae, Humboldt squid (''Dosidicus gigas'') which can grow to in mantle length (ML).Glaubrecht, M. & M.A. Salcedo-Vargas 2004. The Humboldt squid ''Dosidicus gigas'' (Orbigny, 1835): History of the Berlin specimen, with a reappraisal of other (bathy-)pelagic gigantic cephalopods (Mollusca, Ommastrephidae, Architeuthidae). ''Zoosystematics and Evolution'' 80(1): 53–69. It also contains the smallest squid species belonging to the family, the glass squid ('' Hyaloteuthis pelagica'') which has a mantle length of only up to .Nesis, K. N. 1982. Abridged key to the cephalopod mollusks of the world's ocean. 385,ii pp. Light and Food Industry Publishing House, Moscow. (In Russian.). Translated into English by B. S. Levitov, ed. by L. A. Burgess (1987), Cephalopods of the world. T. F. H. Publications, Neptune City, N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ommastrephidae
Ommastrephidae is a family of squid containing three subfamilies, 11 genera, and over 20 species. They are widely distributed globally and are extensively fished for food. One species, ''Todarodes pacificus'', comprises around half of the world's cephalopod catch annually. Some members of Ommastrephidae ( volplaning species) are known to have the ability to glide out of water, earning them the common name of "flying squid". Description The ommastrephids are small to large squids, with mantle lengths ranging from that of the glass squid ('' Hyaloteuthis pelagica'') at ,Nesis, K. N. 1982. Abridged key to the cephalopod mollusks of the world's ocean. 385,ii pp. Light and Food Industry Publishing House, Moscow. (In Russian.). Translated into English by B. S. Levitov, ed. by L. A. Burgess (1987), Cephalopods of the world. T. F. H. Publications, Neptune City, NJ, 351pp. to the Humboldt squid (''Dosidicus gigas'') at .Glaubrecht, M. & M.A. Salcedo-Vargas 2004. The Humboldt squid ''Dos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squid
True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting these criteria. Like all other cephalopods, squid have a distinct head, bilateral symmetry, and a mantle. They are mainly soft-bodied, like octopuses, but have a small internal skeleton in the form of a rod-like gladius (cephalopod), gladius or pen, made of chitin. Squid diverged from other cephalopods during the Jurassic and occupy a similar role to teleost fish as open water predators of similar size and behaviour. They play an important role in the open water food web. The two long tentacles are used to grab prey and the eight arms to hold and control it. The beak then cuts the food into suitable size chunks for swallowing. Squid are rapid swimmers, moving by Aquatic locomotion#Jet propulsion, jet propulsion, and largely locate their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squid
True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting these criteria. Like all other cephalopods, squid have a distinct head, bilateral symmetry, and a mantle. They are mainly soft-bodied, like octopuses, but have a small internal skeleton in the form of a rod-like gladius (cephalopod), gladius or pen, made of chitin. Squid diverged from other cephalopods during the Jurassic and occupy a similar role to teleost fish as open water predators of similar size and behaviour. They play an important role in the open water food web. The two long tentacles are used to grab prey and the eight arms to hold and control it. The beak then cuts the food into suitable size chunks for swallowing. Squid are rapid swimmers, moving by Aquatic locomotion#Jet propulsion, jet propulsion, and largely locate their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tree Of Life Web Project
The Tree of Life Web Project is an Internet project providing information about the diversity and phylogeny of life on Earth. This collaborative peer reviewed project began in 1995, and is written by biologists from around the world. The site has not been updated since 2011, however the pages are still accessible. The pages are linked hierarchically, in the form of the branching evolutionary tree of life, organized cladistically. Each page contains information about one particular group of organisms and is organized according to a branched tree-like form, thus showing hypothetical relationships between different groups of organisms. In 2009 the project ran into funding problems from the University of Arizona. Pages and Treehouses submitted took a considerably longer time to be approved as they were being reviewed by a small group of volunteers, and apparently, around 2011, all activities ended. History The idea of this project started in the late 1980s. David Maddison was wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Adam (malacologist)
William Adam (27 Januari 1909, The Hague – 3 November 1988, Brussels) was a Dutch / Belgian malacologist who specialised in cephalopods. Adam described a number of cuttlefish and bobtail squid species, including '' Euprymna hoylei'', '' Sepia cottoni'', '' Sepia dollfusi'', '' Sepia dubia'', '' Sepia reesi'', '' Sepia sewelli'', '' Sepia thurstoni'', '' Sepia vercoi'', and '' Sepiola knudseni''. Adam was born as the son of Constance Jeannette Barkhuijsen and the merchant sailor William Adam. After his schooling in The Hague he visited Java in 1926-27. Upon his return home he studied biology at Utrecht University, obtaining his PhD in 1933 with a dissertation on terrestrial mollusk glands. He then took a position at the Museum of Natural Sciences The Museum of Natural Sciences of Belgium (french: Muséum des sciences naturelles de Belgique, nl, Museum voor Natuurwetenschappen van België) is a museum dedicated to natural history, located in Brussels, Belgium. The mus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Food And Agriculture Organization
The Food and Agriculture Organization of the United Nations (FAO)french: link=no, Organisation des Nations unies pour l'alimentation et l'agriculture; it, Organizzazione delle Nazioni Unite per l'Alimentazione e l'Agricoltura is an international organization that leads international efforts to defeat hunger and improve nutrition and food security. Its Latin motto, ', translates to "let there be bread". It was founded on 16 October 1945. The FAO is composed of 195 members (including 194 countries and the European Union). Their headquarters is in Rome, Italy, and the FAO maintains regional and field offices around the world, operating in over 130 countries. It helps governments and development agencies coordinate their activities to improve and develop agriculture, forestry, fisheries, and land and water resources. It also conducts research, provides technical assistance to projects, operates educational and training programs, and collects data on agricultural output, produ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book ''On the Origin of Species''. He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric speciation, allopatric, peripatric speciation, peripatric, parapatric speciation, parapatric, and sympatric speciation, sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments of speciation, laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject of much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-Pacific
The Indo-Pacific is a vast biogeographic region of Earth. In a narrow sense, sometimes known as the Indo-West Pacific or Indo-Pacific Asia, it comprises the tropical waters of the Indian Ocean, the western and central Pacific Ocean, and the seas connecting the two in the general area of Indonesia. It does not include the temperate and polar regions of the Indian and Pacific oceans, nor the Tropical Eastern Pacific, along the Pacific coast of the Americas, which is also a distinct marine realm. The term is especially useful in marine biology, ichthyology, and similar fields, since many marine habitats are continuously connected from Madagascar to Japan and Oceania, and a number of species occur over that range, but are not found in the Atlantic Ocean. The region has an exceptionally high species richness, with the world's highest species richness being found in at its heart in the Coral Triangle, and a remarkable gradient of decreasing species richness radiating outward in al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yaichirō Okada
was a Japanese zoologist. He was born in Ishikawa Prefecture. Okada studied at the Imperial Fisheries Institute (now Tokyo University of Marine Science and Technology). He was a professor at Tokyo Higher Normal School (now University of Tsukuba), and after World War II he taught at Mie University from 1950, where he was dean of Fisheries. After retirement he served as a professor at Tokai University is a private non-sectarian higher education institution located in Tokyo, Japan. It was founded by Dr. Shigeyoshi Matsumae. It was accredited under Japan's old educational system in 1946 and under the new system in 1950. In 2008, Tokai Un .... As a zoologist, has contributed in the field of fish taxonomy, as well as reptiles and amphibians. Okada's primary work in English was ''Fishes of Japan'', which published in 1955 by Maruzen and subsequently issued in revised editions. References 20th-century Japanese zoologists Japanese mammalogists 1892 births 1976 death ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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