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Sunder Lal Hora
Sunder Lal Hora (22 May 1896 – 8 December 1955) was an Indian ichthyologist known for his biogeographic theory on the affinities of Western Ghats and Indomalayan fish forms. Life Hora was born at Hafizabad in the Punjab (modern day Pakistan) on 2 May 1896. He schooled in Jullunder before college at Lahore. He met Thomas Nelson Annandale who visited his college in Lahore in 1919 and was invited to the Zoological Survey of India. In 1921 he became in-charge of ichthyology and herpetology and in 1947 became Superintendent of the Z.S.I. and then Director after Baini Prashad moved to become an advisor to the government. He was elected a Fellow of the Royal Society of Edinburgh in 1929. His proposers were James Hartley Ashworth, John Stephenson, Charles Henry O'Donoghue and James Ritchie. He died on 8 December 1955. Works The ''Satpura hypothesis'', a zoo-geographical hypothesis proposed by him that suggests that the central Indian Satpura Range of hills acted as a bridge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoological Survey Of India
The Zoological Survey of India (ZSI), founded on 1 July 1916 by Government of India Ministry of Environment, Forest and Climate Change, as premier Indian organisation in zoological research and studies to promote the survey, exploration and research of the fauna in the country. History The annals of Zoological Survey of India (ZSI) reflect an eventful beginning for the Survey even before its formal birth and growth. The history of ZSI begins from the days of the Asiatic Society of Bengal founded by Sir William Jones on 15 January 1784. The Asiatic Society of Bengal was the mother institution not only to the Indian Museum (1875) but also to the institutions like the Zoological Survey of India and the Geological Survey of India. ZSI's establishment was in fact a fulfillment of the dream of Sir William Jones, the founder of the Asiatic Society of Bengal, whose vision encompassed the entire range of human knowledge. The Asiatic Society had started collecting zoological and geol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Hartley Ashworth
James Hartley Ashworth FRS FRSE DSc SZS (2 May 1874 – 4 February 1936) was a British marine zoologist. Life See He was born on 2, May 1874, in Accrington in Lancashire, the only son of James Ashworth. He spent most of his early life in Burnley, attending the Carlton Road School there. He appears to have befriended Dr James MacKenzie during his youth, due to MacKenzie's role as the family GP, and his interest in science was awakened. MacKenzie appears to have had a mentoring role during his teenage years. Ashworth was encouraged to train, and went to Manchester to study Chemistry at Owen's College. Here he quickly found a new interest and changed to study Zoology. He then moved to London University where he received a BSc with Honours in Zoology and Botany in 1895. In 1899 he received a Doctorate in the same subject. He obtained a post in Naples in Italy where his interests began to focus upon marine biology. In 1901 he became a lecturer in invertebrate zoology at the Univ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bagridae
The Bagridae are a family of catfish that are native to Africa ('' Bagrus'') and Asia (all other genera) from Japan to Borneo. It includes about 245 species. These fish are commonly known as naked catfishes or bagrid catfishes. Many large bagrids are important as a source of food. Some species are also kept as aquarium fishes. Physical characteristics The dorsal fin is preceded by a spine. The adipose fin is present and can have a relatively long base in some species. The pectoral fin spine can be serrated. The body is completely naked (they have no scales). The maximum length is about . Fishes of the family Bagridae have four pairs of well-developed barbels covered by a layer of taste bud-enriched epithelium. Taxonomy The taxonomy of this family has changed rapidly. Nelson (2006) comments how "the family is very different from that recognized in Nelson (1994)". Claroteidae and Austroglanididae contain species that were previously bagrids. Auchenoglanididae is considered by some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horabagrus
''Horabagrus'' is a genus of catfish in the family Horabagridae endemic to rivers in the Western Ghats in Kerala and Karnataka, India. ''H. brachysoma'' is an important food fish and members of this genus can be found in the aquarium trade. Taxonomy The genus ''Horabagrus'' is usually classified under the family Bagridae, but there are disagreements. The genus name is after the Indian zoologist Sunder Lal Hora. Though listed under Bagridae, ''Horabagrus'' is not listed under either of the two Bagrid subfamilies by the All Catfish Species Inventory. In Nelson (2006), the genus is provisionally placed in the family Schilbeidae, where it is sometimes recognized as its own subfamily. In de Pinna (1998), this genus is classified as sister to the catfishes Pangasiidae and above, which would require a separate family. This genus has also been classified in its own family Horabagridae. In a 2007 paper, ''Horabagrus'' was not classified under any current catfish families. In 2016, Wang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzias
''Oryzias'' is a genus of ricefishes native to fresh and brackish water in east and south Asia. Some species are widespread and the Japanese rice fish (''O. latipes'') is commonly used in science as a model organism, while others have very small ranges and are threatened. They are small, up to long, and most are relatively plain in colour. The genus name ''Oryzias'' is a reference to the scientific name for rice, '' Oryza''. They have an unusual reproductive behavior where the female facultatively carries the eggs in a cluster at the pelvic or anal fins for a period after they have been fertilized. Species There are currently 33 recognized species in this genus: * '' Oryzias asinua'' Parenti, Hadiaty, Lumbantobing & Herder, 2013 * '' Oryzias bonneorum'' Parenti, 2008 * '' Oryzias carnaticus'' Jerdon, 1849 * '' Oryzias celebensis'' M. C. W. Weber, 1894 (Celebes medaka) * '' Oryzias curvinotus'' Nichols & C. H. Pope, 1927 * '' Oryzias dancena'' F. Hamilton, 1822 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horaichthys
''Oryzias'' is a genus of ricefishes native to fresh and brackish water in east and south Asia. Some species are widespread and the Japanese rice fish (''O. latipes'') is commonly used in science as a model organism, while others have very small ranges and are threatened. They are small, up to long, and most are relatively plain in colour. The genus name ''Oryzias'' is a reference to the scientific name for rice, ''Oryza''. They have an unusual reproductive behavior where the female facultatively carries the eggs in a cluster at the pelvic or anal fins for a period after they have been fertilized. Species There are currently 33 recognized species in this genus: * ''Oryzias asinua'' Parenti, Hadiaty, Lumbantobing & Herder, 2013 * ''Oryzias bonneorum'' Parenti, 2008 * ''Oryzias carnaticus'' Jerdon, 1849 * ''Oryzias celebensis'' M. C. W. Weber, 1894 (Celebes medaka) * ''Oryzias curvinotus'' Nichols & C. H. Pope, 1927 * '' Oryzias dancena'' F. Hamilton, 1822 * '' Oryz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ricefish
The ricefishes are a family (Adrianichthyidae) of small ray-finned fish that are found in fresh and brackish waters from India to Japan and out into the Malay Archipelago, most notably Sulawesi (where the Lake Poso and Lore Lindu species are known as buntingi). The common name ricefish derives from the fact that some species are found in rice paddies. This family consists of about 37 species in two genera (some recognize a third, ''Xenopoecilus''). Several species are rare and threatened, and some 2–4 may already be extinct. Description Most of these species are quite small, making them of interest for aquaria. ''Adrianichthys'' reach lengths of depending on the exact species involved, while the largest ''Oryzias'' reaches up to . Most ''Oryzias'' species are less than a half this length, with the smallest being up to only long. They have a number of distinctive features, including an unusual structure to the jaw, and the presence of an additional bone in the tail. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Ladder
A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movements of potamodromous species. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of relatively low steps (hence the term ''ladder'') into the waters on the other side. The velocity of water falling over the steps has to be great enough to attract the fish to the ladder, but it cannot be so great that it washes fish back downstream or exhausts them to the point of inability to continue their journey upriver. History Written reports of rough fishways date to 17th-century France, where bundles of branches were used to make steps in steep channels to bypass obstructions. A pool and weir salmon ladder was built around 1830 by James Smith, a Scottish engineer on the River Teith, near Deanston, Perthshire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convergent Evolution
Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy. The recurrent evolution of flight is a classic example, as flying insects, birds, pterosaurs, and bats have independently evolved the useful capacity of flight. Functionally similar features that have arisen through convergent evolution are ''analogous'', whereas '' homologous'' structures or traits have a common origin but can have dissimilar functions. Bird, bat, and pterosaur wings are analogous structures, but their forelimbs are homologous, sharing an ancestral state despite serving different functions. The opposite of convergence is divergent evolution, where related species evolve different traits. Convergent evolution is similar to parallel evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malay Peninsula
The Malay Peninsula (Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area contains Peninsular Malaysia, Southern Thailand, and the southernmost tip of Myanmar (Kawthaung). The island country of Singapore also has historical and cultural ties with the region. The indigenous people of the peninsula are the Malays, an Austronesian people. The Titiwangsa Mountains are part of the Tenasserim Hills system and form the backbone of the peninsula and the southernmost section of the central cordillera, which runs from Tibet through the Kra Isthmus, the peninsula's narrowest point, into the Malay Peninsula. The Strait of Malacca separates the Malay Peninsula from the Indonesian island of Sumatra, and the south coast is separated from the island of Singapore by the Straits of Johor. Etymology The Malay term ''Tanah Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satpura Range
The Satpura Range is a range of hills in central India. The range rises in eastern Gujarat running east through the border of Maharashtra and Madhya Pradesh and ends in Chhattisgarh. The range parallels the Vindhya Range to the north, and these two east-west ranges divide Indian Subcontinent into the Indo-Gangetic plain of northern India and the Deccan Plateau of the south. The Narmada River originates from north-eastern end of Satpura in Amarkantak, and runs in the depression between the Satpura and Vindhya ranges, draining the northern slope of the Satpura range, running west towards the Arabian Sea. The Tapti River originates in the eastern-central part of Satpura, crossing the range in the center and running west at the range's southern slopes before meeting the Arabian Sea at Surat, draining the central and southern slopes of the range. Multai, the place of Tapi river origin is located about 465 kilometer far, south-westerly to Amarkantak, separated across by the hill range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
