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Indian Threadfin
The Indian threadfin (''Leptomelanosoma indicum'') is a species of marine ray-finned fish from the family Polynemidae, the threadfins. It is a coastal species from south-east Asia which has been recorded in Papua New Guinea. Description The Indian threadfin is a large species with an elongated head and body. Its eye is roughly the same size as the length of its snout. The joint of the jaws is to the rear of the eyelid. It has two separated dorsal fins, the first dorsal fin contains 8 spines while the second dorsal fin has a single spine and 12 or 13 soft rays. The anal fin has 3 spines and 10 or 11 soft rays. The base of the anal-fin is shorter than that of the second dorsal-fin. The pectoral fin has 12 to 14rays and has a length equivalent to 19 to 22% of the standard length, its tip not reaching to the tip of the pelvic fin. The pectoral fin is situated well below the body's midline. There are five pectoral filaments, the first one being the shortest and does not extend to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hiroyuki Motomura
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Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines serve an important role in schooling behavior, predation, and orientation. Fish can use their lateral line system to follow the vortices produced by fleeing prey. Lateral lines are usually visible as faint lines of pores running lengthwise down each side, from the vicinity of the gill covers to the base of the tail. In some species, the receptive organs of the lateral line have been modified to function as electroreceptors, which are organs used to detect electrical impulses, and as such, these systems remain closely linked. Most amphibian larvae and some fully aquati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypy
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. In contrast, an oligotypic taxon contains more than one but only a very few subordinate taxa. Examples Just as the term ''monotypic'' is used to describe a taxon including only one subdivision, the contained taxon can also be referred to as monotypic within the higher-level taxon, e.g. a genus monotypic within a family. Some examples of monotypic groups are: Plants * In the order Amborellales, there is only one family, Amborellaceae and there is only one genus, '' Amborella'', and in this genus there is only one species, namely ''Amborella trichopoda.' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vizagapatam
, image_alt = , image_caption = From top, left to right: Visakhapatnam aerial view, Vizag seaport, Simhachalam Temple, Aerial view of Rushikonda Beach, Beach road, Novotel Visakhapatnam, INS Kursura submarine museum, Vizag skyline, Kambalakonda wildlife sanctuary , etymology = , nickname = The City of DestinyThe Jewel of the East Coast , image_map = , map_caption = , pushpin_map = India Visakhapatnam#India Andhra Pradesh#India#Asia#Earth , pushpin_label_position = left , pushpin_map_alt = , pushpin_map_caption = , coordinates = {{coord, 17, 42, 15, N, 83, 17, 52, E, display=inline,title , subdivision_type = Country , subdivision_name = {{flag, India , subdivision_type1 = State , subdivision_name1 = Andhra Pradesh , subdivision_type2 = Districts , subdivision_name2 = Visakhapatnam, Anakap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type (biology)
In biology, a type is a particular wiktionary:en:specimen, 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 defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set (mathematics), set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patrick Russell (herpetologist)
Patrick Russell (6 February 1726, Edinburgh – 2 July 1805, London) was a Scottish surgeon and naturalist who worked in India. He studied the snakes of India and is considered the "Father of Indian Ophiology". Russell's viper, '' Daboia russelii'', is named after him. Early life The fifth son of John Russell, a well-known lawyer of Edinburgh, and his third wife Mary, Patrick was the half-brother of Alexander Russell, FRS and William Russell, FRS. Patrick studied Roman and Greek classics at Edinburgh high school after which he studied medicine at the University under Alexander Monro. He graduated as a Doctor of Medicine in 1750 and joined his half-brother, Alexander Russell, who was 12 years senior in Aleppo, Syria. In 1740 Alexader had been made a Physician to the Levant Company's Factory. Alexander was involved in quarantine and disease control and was a keen naturalist with a knowledge of local languages and a close friend of the Pasha. Aleppo In 1753, Alexander resigned, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish People
The Irish ( ga, Muintir na hÉireann or ''Na hÉireannaigh'') are an ethnic group and nation native to the island of Ireland, who share a common history and culture. There have been humans in Ireland for about 33,000 years, and it has been continually inhabited for more than 10,000 years (see Prehistoric Ireland). For most of Ireland's recorded history, the Irish have been primarily a Gaelic people (see Gaelic Ireland). From the 9th century, small numbers of Vikings settled in Ireland, becoming the Norse-Gaels. Anglo-Normans also conquered parts of Ireland in the 12th century, while England's 16th/17th century conquest and colonisation of Ireland brought many English and Lowland Scots to parts of the island, especially the north. Today, Ireland is made up of the Republic of Ireland (officially called Ireland) and Northern Ireland (a part of the United Kingdom). The people of Northern Ireland hold various national identities including British, Irish, Northern I ... [...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] |
Crustacean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans ( Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthic Zone
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "the depths." Organisms living in this zone are called benthos and include microorganisms (e.g., bacteria and fungi) as well as larger invertebrates, such as crustaceans and polychaetes. Organisms here generally live in close relationship with the substrate and many are permanently attached to the bottom. The benthic boundary layer, which includes the bottom layer of water and the uppermost layer of sediment directly influenced by the overlying water, is an integral part of the benthic zone, as it greatly influences the biological activity that takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud. Description Oceans The benthic region of the ocean begins at the shore line ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Of Papua
The Gulf of Papua is located in the southern coast region of New Guinea. It has a total surface area of . Geography Some of New Guinea's largest rivers, such as the Fly River, Turama River, Kikori River, Purari River, and Wawoi River flow into the gulf, making it a large delta. While the western coast is characterized by swampy tidal waterways, land to the east ending at Cape Possession is flat and sandy. The Papuan Gulf's central and eastern interior slowly rises to meet the mountainous Southern Highlands, and is covered in a variety of inland swamps and dense tropical hardwood forests. The western interior possess a large region of limestone karst. The dry season begins in October and extends to February, after which the wet season starts. The southern border of the gulf is defined as a line from the southwestern corner of the Fly River Delta in the west, to Cape Suckling 355 km east of this, which is 70 km northwest of Port Moresby. This encloses a sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kerema Bay
Kerema is the capital of Gulf Province, Papua New Guinea. It is located on the coast of Gulf of Papua. The Gulf region is aptly named for its concave coastline with large deltas. The Gulf area is a riparian region where many rivers from the southern slopes of the highlands drain into. Culture and tradition There are more than twenty languages spoken in Gulf Province A gulf is a large inlet from the ocean into the landmass, typically with a narrower opening than a bay, but that is not observable in all geographic areas so named. The term gulf was traditionally used for large highly-indented navigable bodies .... Languages spoken in the Kerema area include Toaripi, Kakiae, Opae, Moivo Hivi and Tairuma. The villages towards the east of Kerema from Hamuhamu, Miaru to Iokea and inland to Moveave all speak Toaripi. The Gulf's traditional culture and knowledge was one of the first to be exposed to the outside world. Thus it was one of the first cultures to change, as outsiders, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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