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Raja Radula
The rough ray (''Raja radula'') is a Mediterranean ray species of the Rajidae family described by François-Etienne de La Roche, Delaroche in 1809. Description The rough ray is named for the spinules that cover its upper surface. In juveniles and males, these rough spinules are only on the snout and the lower half of the tail. The females of this species have spinules in these areas, but also around the mouth, along the mid-section, and the full tail. These spinules differ from the thorns that are on the inner-eye and from the end of the head to before the dorsal fin. There are two thorns between the dorsal fins. The subcircular body has a short, curved snout, anterior edges are convex and the extremities are angular wings. Most individuals are around 70 centimeters. The main upper surface colors are light brown and grey, with darker spots and lines. There are two eye-spots with yellow rings and a thick outer darker ring with light dots, placed on either side of the spinal meridi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
François-Étienne De La Roche
François-Étienne de La Roche (or Delaroche) (9 December 1781 – 23 December 1813) was a Genevan physician, naturalist, chemist, botanist and ichthyologist. Early life and family He was born in Geneva to Marie Castanet and Daniel de La Roche, and was the youngest of three children. His father was an Edinburgh-trained physician, botanist, and medical translator from Geneva, who was friends with Louis Odier, the Swiss physician, medical translator and publisher. After working in Geneva, the family moved to Paris where de La Roche senior was physician to the Duke of Orléans, and later at the :fr:Rue du Faubourg-Saint-Martin health centre. Career De La Roche studied at the Faculty of Medicine at the University of Paris where, in 1806, he completed his medical thesis on the effects of strong heat on animal husbandry. He became a physician at ''L'Hôpital Necker''. He collected and studied fish on an expedition to the Spanish Balearic islands between October 1807 and May 1808; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Museum Of Natural History, France
The French National Museum of Natural History, known in French as the ' (abbreviation MNHN), is the national natural history museum of France and a ' of higher education part of Sorbonne Universities. The main museum, with four galleries, is located in Paris, France, within the Jardin des Plantes on the left bank of the River Seine. It was formally founded in 1793 during the French Revolution, but was begun even earlier in 1635 as the royal garden of medicinal plants. The museum now has 14 sites throughout France. History 17th–18th century File:Jardin du roi 1636.png, The Royal Garden of Medicinal Plants in 1636 File:Buffon statue dsc00979.jpg, Statue of Georges-Louis Leclerc, Comte de Buffon in the formal garden File:Buffon, Georges Louis - Leclerc, comte de – Histoire naturelle, générale et particuliére, 1763 – BEIC 8822844.jpg, Buffon's "Natural History" (1763) File:MNHN-logo.jpg, The museum's seal, designed in 1793, illustrates the three realms of Nature, Collectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Biodiversity Information Facility
The Global Biodiversity Information Facility (GBIF) is an international organisation that focuses on making scientific data on biodiversity available via the Internet using web services. The data are provided by many institutions from around the world; GBIF's information architecture makes these data accessible and searchable through a single portal. Data available through the GBIF portal are primarily distribution data on plants, animals, fungi, and microbes for the world, and scientific names data. The mission of the GBIF is to facilitate free and open access to biodiversity data worldwide to underpin sustainable development. Priorities, with an emphasis on promoting participation and working through partners, include mobilising biodiversity data, developing protocols and standards to ensure scientific integrity and interoperability, building an informatics architecture to allow the interlinking of diverse data types from disparate sources, promoting capacity building and ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Radula Distribution
''Raja'' (; from , IAST ') is a royal title used for South Asian monarchs. The title is equivalent to king or princely ruler in South Asia and Southeast Asia. The title has a long history in South Asia and Southeast Asia, being attested from the Rigveda, where a ' is a ruler, see for example the ', the "Battle of Ten Kings". Raja-ruled Indian states While most of the Indian salute states (those granted a gun salute by the British Crown) were ruled by a Maharaja (or variation; some promoted from an earlier Raja- or equivalent style), even exclusively from 13 guns up, a number had Rajas: ; Hereditary salutes of 11-guns : * the Raja of Pindrawal * the Raja of Morni * the Raja of Rajouri * the Raja of Ali Rajpur * the Raja of Bilaspur * the Raja of Chamba * the Raja of Faridkot * the Raja of Jhabua * the Raja of Mandi * the Raja of Manipur * the Raja of Narsinghgarh * the Raja of Pudukkottai * the Raja of Rajgarh * the Raja of Sangli * the Raja of Sailana * the Raja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucoraja Naevus
''Leucoraja naevus'' is a species of fish belonging to the family Rajidae. It is mainly found along the coasts of the Northern Atlantic Ocean and occasionally in the Mediterranean Sea The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ....Guide of Mediterranean Skates and Rays (Leucoraja naevus). Oct. 2022. Mendez L., Bacquet A. and F. Briand. http://www.ciesm.org/Guide/skatesandrays/leucoraja-naevus References naevus IUCN Red List least concern species Fish described in 1841 {{Rajiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Africana
''Raja mauritaniensis'', commonly known as the African ray, is a species of ray in the family Rajidae. It is found at depths of in the eastern Atlantic Ocean off Mauritania and Tunisia. This species was described in 1977, but the currently used scientific name is a homonym, preoccupied by ''Raja africana'' , which is a synonym of ''Urogymnus asperrimus''. Consequently, a replacement scientific name is needed for the African ray. Furthermore, the validity of the African ray has been questioned, with some suggesting that its type specimen In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the ... may be an aberrant '' R. miraletus'' or '' R. straeleni''. References African skate Fish of West Africa Fish of Africa Marine fish of North Africa Fish described in 2021 {{Rajifor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raja Radula On Rocky Bottoms
''Raja'' (; from , IAST ') is a royal title used for South Asian monarchs. The title is equivalent to king or princely ruler in South Asia and Southeast Asia. The title has a long history in South Asia and Southeast Asia, being attested from the Rigveda, where a ' is a ruler, see for example the ', the "Battle of Ten Kings". Raja-ruled Indian states While most of the Indian salute states (those granted a gun salute by the British Crown) were ruled by a Maharaja (or variation; some promoted from an earlier Raja- or equivalent style), even exclusively from 13 guns up, a number had Rajas: ; Hereditary salutes of 11-guns : * the Raja of Pindrawal * the Raja of Morni * the Raja of Rajouri * the Raja of Ali Rajpur * the Raja of Bilaspur * the Raja of Chamba * the Raja of Faridkot * the Raja of Jhabua * the Raja of Mandi * the Raja of Manipur * the Raja of Narsinghgarh * the Raja of Pudukkottai * the Raja of Rajgarh * the Raja of Sangli * the Raja of Sailana * the Raja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Continued overexploitation can lead to the destruction of the resource, as it will be unable to replenish. The term applies to natural resources such as water aquifers, grazing pastures and forests, wild medicinal plants, fish stocks and other wildlife. In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at an unsustainable rate, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology, the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Threatened Rays
__NOTOC__ Threatened rays are those vulnerable to endangerment (extinction) in the near future. The International Union for Conservation of Nature (IUCN) ranks threatened species in three categories: :: Vulnerable species :: Endangered species :: Critically endangered species The term ''threatened'' strictly refers to these three categories (critically endangered, endangered and vulnerable), while ''vulnerable'' is used to refer to the least at risk of these categories. The terms can be used somewhat interchangeably, as all ''vulnerable'' species are threatened, all ''endangered'' species are vulnerable and threatened, and all ''critically endangered'' species are endangered, vulnerable and threatened. Threatened species are also referred to as a red-listed species, as they are listed in the IUCN Red List of Threatened Species. Together rays and sharks make up the class of modern cartilaginous fishes. Modern fish are either cartilaginous or bony. Cartilaginous fishes have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
