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Merluccius Hernandezi
''Merluccius hernandezi'', the Cortez hake, is a species of fish from the family Merlucciidae, the true hakes. It is endemic to the Gulf of California where it can be found in the epipelagic and mesopelagic zones over the continental shelf, open sea, and sea mounts, to a depth of around 300m. It is a small species which has been referred to as a "dwarf hake" and is of little interest to fisheries, other than small scale local fisheries. It was described in 1985 and small hake in the Gulf of California were previously considered to be Panama hakes (''Merluccius angustimanus''). This species differs from the Panama hake in that in juveniles the caudal fin has a central lobe and is truncate in adults, whereas the caudal fin is emarginate in the Panama hake, its pectoral fin Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher P
Christopher is the English version of a Europe-wide name derived from the Greek name Χριστόφορος (''Christophoros'' or '' Christoforos''). The constituent parts are Χριστός (''Christós''), "Christ" or "Anointed", and φέρειν (''phérein''), "to bear"; hence the "Christ-bearer". As a given name, 'Christopher' has been in use since the 10th century. In English, Christopher may be abbreviated as "Chris", "Topher", and sometimes " Kit". It was frequently the most popular male first name in the United Kingdom, having been in the top twenty in England and Wales from the 1940s until 1995, although it has since dropped out of the top 100. The name is most common in England and not so common in Wales, Scotland, or Ireland. People with the given name Antiquity and Middle Ages * Saint Christopher (died 251), saint venerated by Catholics and Orthodox Christians * Christopher (Domestic of the Schools) (fl. 870s), Byzantine general * Christopher Lekapenos (died 931 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merlucciidae
The Merlucciidae, commonly called merluccid hakes , are a family of cod-like fish, including most hakes. available for download at http://www.fao.org They are native to cold water in the Atlantic and Pacific Oceans, and typically are found at depths greater than in subtropical, temperate, sub-Arctic or sub-Antarctic regions. The best known species are in the genera ''Macruronus'' and ''Merluccius''. These predatory fish are up to in length, though most only reach about half that length, inhabiting the waters of the continental shelf and upper continental slope, where they feed on small fish such as lanternfishes. Several species are important commercial fish, for example the blue grenadier (''Macruronus novaezelandiae'') that is fished in the southwest Pacific and the North Pacific hake (''Merluccius productus'') that is fished off western North America. The taxonomy of the Merluccidae is not settled, with some authorities raising two or three subfamilies, the Merluccinae, Ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Of California
The Gulf of California ( es, Golfo de California), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Bermejo''), is a marginal sea of the Pacific Ocean that separates the Baja California Peninsula from the Mexico, Mexican mainland. It is bordered by the states of Baja California, Baja California Sur, Sonora, and Sinaloa with a coastline of approximately . Rivers that flow into the Gulf of California include the Colorado River, Colorado, Fuerte River, Fuerte, Mayo River (Mexico), Mayo, Sinaloa River, Sinaloa, Sonora River, Sonora, and the Yaqui River, Yaqui. The surface of the gulf is about . Maximum depths exceed because of the complex geology, linked to plate tectonics. The gulf is thought to be one of the most diverse seas on Earth and is home to more than 5,000 species of micro-invertebrates. Parts of the Gulf of California are a UNESCO World Heritage Site. Geography History The marine expeditions of Fortún ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continental Shelf
A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea. Much of these shelves were exposed by drops in sea level during glacial periods. The shelf surrounding an island is known as an ''insular shelf''. The continental margin, between the continental shelf and the abyssal plain, comprises a steep continental slope, surrounded by the flatter continental rise, in which sediment from the continent above cascades down the slope and accumulates as a pile of sediment at the base of the slope. Extending as far as 500 km (310 mi) from the slope, it consists of thick sediments deposited by turbidity currents from the shelf and slope. The continental rise's gradient is intermediate between the gradients of the slope and the shelf. Under the United Nations Convention on the Law of the Sea, the name continental shelf was given a legal definition as the stretch of the seabed adjacent to the shores of a par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Mount
A seamount is a large geologic landform that rises from the ocean floor that does not reach to the water's surface (sea level), and thus is not an island, islet or cliff, cliff-rock. Seamounts are typically formed from volcano#Extinct, extinct volcanoes that rise abruptly and are usually found rising from the seafloor to in height. They are defined by oceanography, oceanographers as independent features that rise to at least above the seafloor, characteristically of conical form.IHO, 2008. Standardization of Undersea Feature Names: Guidelines Proposal form Terminology, 4th ed. International Hydrographic Organization and Intergovernmental Oceanographic Commission, Monaco. The peaks are often found hundreds to thousands of meters below the surface, and are therefore considered to be within the deep sea. During their evolution over geologic time, the largest seamounts may reach the sea surface where wave action erodes the summit to form a flat surface. After they have subsided and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Description
A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a clear description of a new species of organism and explain how it differs from species that have been described previously or are related. In order for species to be validly described, they need to follow guidelines established over time. Zoological naming requires adherence to the ICZN code, plants, the ICN, viruses ICTV, and so on. The species description often contains photographs or other illustrations of type material along with a note on where they are deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million species have been identified and described, out of some 8.7 million that may actually exist. Millions more have become extinct throughout the existence of life on Earth. Naming process A name of a new species becomes valid (available in zo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Panama Hake
The Panama hake (''Merluccius angustimanus''), also known as the dwarf hake, is a merluccid hake found off the west coast of the Americas from Del Mar, California, to Ensenada de Tumaco, Colombia. Description The Panama hake is a relatively small species which does not normally grow to a greater length than 30 cm, although specimens have been described up to 40 cm. It has a relatively long head and long pectoral fins which reach at least to the origin of the anal fin. The anterior dorsal fin has a single spine and 9–12 fin rays, while the posterior dorsal fin has 36–40 rays. The caudal fin can be truncate or emarginated and it has 121–134 scales along the lateral line. It is a silvery colour above and whitish below. Distribution The Panama hake is an eastern Pacific species which is found from southern California and the Gulf of California south to Colombia, although its reported presence in many areas within this range needs verification. Habitat and biology Th ... [...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] |
Pectoral Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merluccius
''Merluccius'' is a genus of merluccid hakes from the Atlantic and Pacific Oceans, where mainly found relatively deep. The generic name is derived from French ''mer'' ("sea") and Latin ''lucius'', "pike." Species The 14 recognized species in this genus are: * ''Merluccius albidus'' ( Mitchill, 1818) (offshore silver hake) * ''Merluccius angustimanus'' Garman, 1899 (Panama hake) * ''Merluccius australis'' ( F. W. Hutton, 1872) (southern hake) Deli Antoni, M.Y., Delpiani, S.M., Stewart, A.L., González-Castro, M. & Díaz De Astarloa, J.M. (2015): ''Merluccius tasmanicus'' Matallanas & Lloris 2006 is a junior synonym of ''M. australis'' (Hutton 1872) (Gadiformes: Merluciidae) based on morphological and molecular data. ''Zootaxa, 3956 (1): 29–55.'' * ''Merluccius bilinearis'' ( Mitchill, 1814) (silver hake) * ''Merluccius capensis'' Castelnau, 1861 (shallow-water Cape hake) * ''Merluccius gayi'' ( Guichenot, 1848) ** ''M. g. gayi'' ( Guichenot, 1848) (South Pacific hake) ** ''M. g. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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