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Pseudobatos Horkelii
The Brazilian guitarfish (''Pseudobatos horkelii'') is a species of fish in the family Rhinobatidae. It is endemic to Brazil, where its natural habitat is coastal waters on the continental shelf. This fish is viviparous and has a long gestation period, concluding with the birth of live pups in February. At this time the fish are subject to intense fishing activity but catches have been dwindling in recent years as a result of overfishing. Because so few breeding-size fish remain, the International Union for Conservation of Nature has assessed the fish's conservation status as being "critically endangered". Taxonomy The Brazilian guitarfish was first described as ''Rhinobatos horkelii'' by Müller & Henle in 1841. They named the new species in honour of the German botanist, Dr. Johann Horkel, Professor of Plant Physiology at the University of Berlin, who had sent them a specimen of the fish preserved in alcohol. Description This species can grow to a length of , but a more usua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johannes Peter Müller
Johannes Peter Müller (14 July 1801 – 28 April 1858) was a German physiologist, comparative anatomist, ichthyologist, and herpetologist, known not only for his discoveries but also for his ability to synthesize knowledge. The paramesonephric duct (Müllerian duct) was named in his honor. Life Early years and education Müller was born in Coblenz. He was the son of a poor shoemaker, and was about to be apprenticed to a saddler when his talents attracted the attention of his teacher, and he prepared himself to become a Roman Catholic Priest. During his college course in Koblenz, he devoted himself to the classics and made his own translations of Aristotle. At first, his intention was to become a priest. When he was eighteen, his love for natural science became dominant, and he turned to medicine, entering the University of Bonn in 1819. There he received his M.D. in 1822. He then studied at the University of Berlin. There, under the influence of G. W. F. Hegel and Kar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arraia Viola (Rio De Janeiro, Brazil, 20 July 1865)
The raspy river stingray, mosaic stingray or ''arraia'' (''Potamotrygon scobina'') is a species of freshwater fish in the family Potamotrygonidae. This stingray is endemic to the Amazon basin in Brazil, where known from the Amazon–Pará River (Belém to near the confluence with the Putumayo River), the Madeira River basin, Uatumã River and lower Tocantins River. It reaches up to in disc width and in total length. It is fairly common, but threatened by habitat loss. It is part of a group consisting of five allopatric Amazonian stingrays, the others being '' P. adamastor'' (Uraricoera River), '' P. amazona'' ( Juruá, Jutaí and Rio Negro), '' P. garmani'' (mid to upper Tocantins River) and '' P. limai'' (Jamari River). These all have three angular cartilages (as opposed to the one or two seen in other species in the genus). References External links Species Description of Potamotrygon scobina at www.shark-references.com scobina ''Scobina'' is a genus of sawfly belongi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Critically Endangered Fish
As of July 2017, the International Union for Conservation of Nature (IUCN) listed 1,000 critically endangered fish species, including 87 which are tagged as possibly extinct. Of all evaluated fish species, 3.0% are listed as critically endangered. The IUCN also lists four fish subspecies as critically endangered. Of the subpopulations of fish evaluated by the IUCN, 20 species subpopulations and one subspecies subpopulation have been assessed as critically endangered. Additionally 3191 fish species (21% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. While the category data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeastern South American Coastal Fauna
The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A ''compass rose'' is primarily composed of four cardinal directions—north, east, south, and west—each separated by 90 degrees, and secondarily divided by four ordinal (intercardinal) directions—northeast, southeast, southwest, and northwest—each located halfway between two cardinal directions. Some disciplines such as meteorology and navigation further divide the compass with additional azimuths. Within European tradition, a fully defined compass has 32 "points" (and any finer subdivisions are described in fractions of points). Compass points or compass directions are valuable in that they allow a user to refer to a specific azimuth in a colloquial fashion, without having to compute or remember degrees. Designations The names of the compass point directions follow these rules: 8-wind compass rose * The four cardinal directio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fish Of Brazil
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are Indigenous (ecology), 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 also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Fish Of Brazil
Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (other) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * Marine life * Marine pollution Military * Marines, a naval-based infantry force ** United States Marine Corps ** Royal Marines of the UK ** Brazilian Marine Corps ** Spanish Marine Infantry ** Fusiliers marins (France) ** Indonesian Marine Corps ** Republic of China Marine Corps ** Republic of Korea Marine Corps ** Royal Thai Marine Corps *"Marine" also means "navy" in several languages: ** Austro-Hungarian Navy () ** Belgian Navy (, , ) ** Royal Canadian Navy () *** Provincial Marine (1796–1910), a predecessor to the Royal Canadian Navy ** Navy of the Democratic Republic of the Congo () ** Royal Danish Navy () ** Finnish Navy (, ) ** French Navy () ** Gabonese Navy () ** German Navy () ** Royal Moroccan Navy () ** Royal Netherlan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudobatos
''Pseudobatos'' is a genus of fish in the Rhinobatidae family. Although its constituent species were previously assigned to ''Rhinobatos'', recent authors treat it as distinct. They are found in warmer coastal parts of the Americas, ranging from northern Chile to California (USA) on the Pacific side, and from northeastern Argentina to North Carolina (USA) on the Atlantic side. They are brownish or grayish above, and reach up to depending on the exact species. Species There are nine currently recognized species in this genus: * ''Pseudobatos buthi'' K.M. Rutledge, 2019 (spadenose guitarfish) * ''Pseudobatos glaucostigmus'' (David Starr Jordan, D. S. Jordan & Charles Henry Gilbert, C. H. Gilbert, 1883) (speckled guitarfish) * ''Pseudobatos horkelii'' (Johannes Peter Müller, J. P. Müller & Friedrich Gustav Jakob Henle, Henle, 1841) (Brazilian guitarfish) * ''Pseudobatos lentiginosus'' (Samuel Garman, Garman, 1880) (Atlantic guitarfish) * ''Pseudobatos leucorhynchus'' (Albert Gü ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Itajaí
Itajaí () is a municipality in the state of Santa Catarina, Brazil. It is located on the northern central coast of Santa Catarina and is part of the Vale do Itajaí Mesoregion, on the right bank of the Itajaí-Açu river mouth. It lies at the mouth of the Itajaí River, at 20 feet (6 metres) above sea level. The city has the 2nd largest gross domestic product and the highest per capita income in the State of Santa Catarina. History The city was founded on June 15, 1860, but the colonization of Itajaí had started in 1658 when the Paulista João Dias D'Arzão arrived in the region. In 1750, Portuguese colonists coming from Madeira and the Azores made this region their home. By 1823 it became a prominent region for Portuguese settlers and, at the end of the 19th century, received a great number of German immigrants. Itajaí and most of Santa Catarina State area is prone to torrential storms specially during the Spring season. Floods are frequent and even tornadoes can form. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Grande, Rio Grande Do Sul
Rio Grande () is a municipality (''município'') and one of the oldest cities in the Brazilian state of Rio Grande do Sul. It was the state capital from 1835 to 1845. It is the most important port city in the state and has one of the most important maritime ports in Brazil. The city is named after a nearby channel which indirectly connects the Lagoa dos Patos, to the northeast, and Lagoa Mirim, to the west, with the Atlantic Ocean. The municipality is bordered by Santa Vitória do Palmar on the south and Pelotas on the north, which lies across the São Gonçalo Channel. The city built up its wealth over the course of its long history of strong industrial movements. Today it is still one of the richest cities in Rio Grande do Sul, mainly because of its port, the second busiest in Brazil, and its refinery, which processes Ipiranga petroleum. The city is served by Rio Grande Airport. History The history of Rio Grande is as old as the history of the whole region. It was exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Batoidea
Batomorphi is a Division (taxonomy), division of Chondrichthyes, cartilaginous fishes, commonly known as rays, this taxon is also known as the Order (biology), superorder Batoidea, but the 5th edition of ''Fishes of the World'' classifies it as the division Batomorphi. They and their close relatives, the sharks, compose the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces. Anatomy Batomorphs are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batomorphs have five ventral slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batomorph gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seine Fishing
Seine fishing (or seine-haul fishing; ) is a method of fishing that employs a surrounding net, called a seine, that hangs vertically in the water with its bottom edge held down by weights and its top edge buoyed by floats. Seine nets can be deployed from the shore as a beach seine, or from a boat. Boats deploying seine nets are known as Fishing vessel#Seiners, seiners. Two main types of seine net are deployed from seiners: ''purse seines'' and ''Danish seines''. A seine differs from a Gillnetting, gillnet, in that a seine encloses fish, where a gillnet directly snares fish. Etymology The word ''seine'' has its origins in the Old English ''segne'', which entered the language via Latin ''sagena'', from the original Greek σαγήνη ''sagēnē'' (a drag-net). History Seines have been used widely in the past, including by Stone Age societies. For example, the Māori people, Māori used large canoes to deploy seine nets which could be over a kilometer long. The nets were woven fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
