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Pollimyrus Isidori
''Pollimyrus isidori'' is a species of electric fish in the family Mormyridae, found in the rivers of Gambia, Bénoué, Senegal, Niger, Volta, Chad, Nile and the coastal banks of several rivers in the Ivory Coast; it can reach a size of approximately 90 mm.Crawford, J.D.; Jacob, P.; Bench, V. (1997b) Sound production and reproductive ecology of strongly acoustic fish in Africa: Pollimyrus isidori, Mormyridae. Behavior 134:1–49. Environment Its preferred environment is fresh water as it provides suitable PH levels. Distribution Its distribution is mainly in Africa, in countries such as Gambia, as well as in Niger, and may extend as far as the Nile River. The subspecies '' Pollimyrus isidori fasciaticeps'' and '' Pollimyrus isidori osborni'' can be found only in the Congo River basin. Diet It feeds on marine mud, remains of vegetation and small invertebrate animals. This species consists of three subspecies: * '' Pollimyrus isidori fasciaticeps'' (Boulenger, 1920). * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Fish
An electric fish is any fish that can generate electric fields. Most electric fish are also electroreceptive, meaning that they can sense electric fields. The only exception is the stargazer family. Electric fish, although a small minority, include both oceanic and freshwater species, and both cartilaginous and bony fishes. Electric fish produce their electrical fields from an electric organ. This is made up of electrocytes, modified muscle or nerve cells, specialized for producing strong electric fields, used to locate prey, for defence against predators, and for signalling, such as in courtship. Electric organ discharges are two types, pulse and wave, and vary both by species and by function. Electric fish have evolved many specialised behaviours. The predatory African sharptooth catfish eavesdrops on its weakly electric mormyrid prey to locate it when hunting, driving the prey fish to develop electric signals that are harder to detect. Bluntnose knifefishes produce an el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niger
) , official_languages = , languages_type = National languagesRépublique du Niger, "Loi n° 2001-037 du 31 décembre 2001 fixant les modalités de promotion et de développement des langues nationales." L'aménagement linguistique dans le monde (accessed 21 September 2016) , languages = , religion_ref = , religion_year = 2012 , religion = , demonym = Nigerien , capital = , coordinates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Described In The 19th Century
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludlow Griscom
Ludlow Griscom (June 17, 1890 – May 28, 1959) was an American ornithologist known as a pioneer in field ornithology. His emphasis on the identification of free-flying birds by field marks became widely adopted by professionals and amateurs. Many called him "Dean of the Birdwatchers." Early life and family Griscom was born in New York City, the son of Clement Acton Griscom Jr. and Genevieve Sprigg Ludlow. Ludlow's grandfather Clement Acton Griscom Sr. was a prominent merchant and shipping executive. His maternal grandfather, William Ludlow, distinguished himself through military service. Griscom's family traces its ancestry back to Thomas Lloyd, a 17th-century physician in Pennsylvania. The oldest of three children, Ludlow Griscom had a sister, Joyce, who died in childhood, and a brother, Acton. As a boy, Ludlow's interest in birds showed itself as early as 1898. In 1907, he found fellow nature enthusiasts when he joined the Linnaean Society of New York. Griscom recei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Treadwell Nichols
John Treadwell Nichols (June 11, 1883 – November 10, 1958) was an American ichthyologist and ornithologist. Life and career Nichols was born in Jamaica Plain, Boston, Massachusetts, the son of Mary Blake (Slocum) and John White Treadwell Nichols. In 1906 he studied vertebrate zoology at Harvard College, where he graduated with a Bachelor of Arts (AB). In 1907 he joined the American Museum of Natural History as assistant in the department of mammalogy. In 1913 he founded ''Copeia'', the official journal of the American Society of Ichthyologists and Herpetologists The American Society of Ichthyologists and Herpetologists (ASIH) is an international learned society devoted to the scientific studies of ichthyology (study of fish) and herpetology (study of reptiles and amphibians). The primary emphases of the .... In 1916 he described the long lost Bermuda petrel together with Louis L. Mowbray, Louis Leon Arthur Mowbray who first sighted this bird within a flock of other petrel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achille Valenciennes
Achille Valenciennes (9 August 1794 – 13 April 1865) was a French zoologist. Valenciennes was born in Paris, and studied under Georges Cuvier. His study of parasitic worms in humans made an important contribution to the study of parasitology. He also carried out diverse systematic classifications, linking fossil and current species. He worked with Cuvier on the 22-volume "'' Histoire Naturelle des Poissons''" (Natural History of Fish) (1828–1848), carrying on alone after Cuvier died in 1832. In 1832, he succeeded Henri Marie Ducrotay de Blainville (1777–1850) as chair of ''Histoire naturelle des mollusques, des vers et des zoophytes'' at the Muséum national d'histoire naturelle. Early in his career, he was given the task of classifying animals described by Alexander von Humboldt (1769–1859) during his travels in the American tropics (1799 to 1803), and a lasting friendship was established between the two men. He is the binomial authority for many species of fish, such a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollimyrus Isidori Isidori
''Pollimyrus'' is a genus of elephantfishes native to Africa. Species There are currently 19 recognized species in this genus: * ''Pollimyrus adspersus'' ( Günther 1866) * ''Pollimyrus brevis'' (Boulenger 1913) (Dungu mormyrid) * ''Pollimyrus castelnaui'' (Boulenger, 1911) ( Dwarf stonebasher) * ''Pollimyrus cuandoensis'' B. J. Kramer, van der Bank & Wink 2013Kramer, B., van der Bank, H. & Wink, M. (2013): Marked differentiation in a new species of dwarf stonebasher, ''Pollimyrus cuandoensis'' sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers. ''Journal of Natural History, 48 (7-8) 014 429-463.'' (Kwando mormyrid) *''Pollimyrus eburneensis'' Bigorne, 1991 (Agnebi elephantfish) * ''Pollimyrus guttatus'' ( Fowler 1936) (Cameroon mormyrid) * ''Pollimyrus isidori'' (Valenciennes 1847) ** ''Pollimyrus isidori fasciaticeps'' (Boulenger 1920) ** ''Pollimyrus isidori isidori'' (Valenciennes 1847) ** ''Pollimyrus isido ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Albert Boulenger
George Albert Boulenger (19 October 1858 – 23 November 1937) was a Belgian-British zoologist who described and gave scientific names to over 2,000 new animal species, chiefly fish, reptiles, and amphibians. Boulenger was also an active botanist during the last 30 years of his life, especially in the study of roses. Life Boulenger was born in Brussels, Belgium, the only son of Gustave Boulenger, a Belgian public notary, and Juliette Piérart, from Valenciennes. He graduated in 1876 from the Free University of Brussels with a degree in natural sciences, and worked for a while at the Royal Belgian Institute of Natural Sciences, Brussels, as an assistant naturalist studying amphibians, reptiles, and fishes. He also made frequent visits during this time to the ''Muséum national d'Histoire naturelle'' in Paris and the British Museum in London. In 1880, he was invited to work at the Natural History Museum, then a department of the British Museum, by Dr. Albert C. L. G. Günther a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollimyrus Isidori Osborni
''Pollimyrus'' is a genus of elephantfishes native to Africa. Species There are currently 19 recognized species in this genus: * ''Pollimyrus adspersus'' ( Günther 1866) * ''Pollimyrus brevis'' (Boulenger 1913) (Dungu mormyrid) * ''Pollimyrus castelnaui'' (Boulenger, 1911) ( Dwarf stonebasher) * ''Pollimyrus cuandoensis'' B. J. Kramer, van der Bank & Wink 2013Kramer, B., van der Bank, H. & Wink, M. (2013): Marked differentiation in a new species of dwarf stonebasher, ''Pollimyrus cuandoensis'' sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers. ''Journal of Natural History, 48 (7-8) 014 429-463.'' (Kwando mormyrid) *''Pollimyrus eburneensis'' Bigorne, 1991 (Agnebi elephantfish) * ''Pollimyrus guttatus'' ( Fowler 1936) (Cameroon mormyrid) * ''Pollimyrus isidori'' (Valenciennes 1847) ** ''Pollimyrus isidori fasciaticeps'' (Boulenger 1920) ** ''Pollimyrus isidori isidori'' (Valenciennes 1847) ** ''Pollimyrus isido ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollimyrus Isidori Fasciaticeps
''Pollimyrus'' is a genus of elephantfishes native to Africa. Species There are currently 19 recognized species in this genus: * ''Pollimyrus adspersus'' ( Günther 1866) * ''Pollimyrus brevis'' (Boulenger 1913) (Dungu mormyrid) * ''Pollimyrus castelnaui'' (Boulenger, 1911) (Dwarf stonebasher) * ''Pollimyrus cuandoensis'' B. J. Kramer, van der Bank & Wink 2013Kramer, B., van der Bank, H. & Wink, M. (2013): Marked differentiation in a new species of dwarf stonebasher, ''Pollimyrus cuandoensis'' sp. nov. (Mormyridae: Teleostei), from a contact zone with two sibling species of the Okavango and Zambezi rivers. ''Journal of Natural History, 48 (7-8) 014 429-463.'' (Kwando mormyrid) *''Pollimyrus eburneensis'' Bigorne, 1991 (Agnebi elephantfish) * ''Pollimyrus guttatus'' ( Fowler 1936) (Cameroon mormyrid) * ''Pollimyrus isidori'' (Valenciennes 1847) ** ''Pollimyrus isidori fasciaticeps'' (Boulenger 1920) ** ''Pollimyrus isidori isidori'' (Valenciennes 1847) ** ''Pollimyrus isidor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nile
The Nile, , Bohairic , lg, Kiira , Nobiin language, Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the List of rivers by length, longest river in the world, though this has been contested by research suggesting that the Amazon River is slightly longer.Amazon Longer Than Nile River, Scientists Say Of the world's major rivers, the Nile is one of the smallest, as measured by annual flow in cubic metres of water. About long, its drainage basin covers eleven countries: the Democratic Republic of the Congo, Tanzania, Burundi, Rwanda, Uganda, Kenya, Ethiopia, Erit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Gambia
The Gambia,, ff, Gammbi, ar, غامبيا officially the Republic of The Gambia, is a country in West Africa. It is the smallest country within mainland AfricaHoare, Ben. (2002) ''The Kingfisher A-Z Encyclopedia'', Kingfisher Publications. p. 11. . and is surrounded by Senegal, except for its western coast on the Atlantic Ocean. The Gambia is situated on both sides of the lower reaches of the Gambia River, the nation's namesake, which flows through the centre of the Gambia and empties into the Atlantic Ocean, thus the long shape of the country. It has an area of with a population of 1,857,181 as of the April 2013 census. Banjul is the Gambian capital and the country's largest metropolitan area, while the largest cities are Serekunda and Brikama. The Portugal, Portuguese in 1455 entered the Gambian region, the first Europeans to do so, but never established important trade there. In 1765, the Gambia was made a part of the British Empire by establishment of the Gambia Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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