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Alosa Macedonica
''Alosa macedonica'', or the Macedonian shad (also known as ''liparia''), is a landlocked species of clupeid fish endemic to Greece. Its single natural occurrence is the freshwater Lake Volvi in northern Greece. It is threatened by habitat loss. Biology ''Alosa macedonica'' is a member of the genus ''Alosa'', whose other species are often anadromous migrating between marine and freshwater. Research suggests that the ancestors of ''Alosa macedonica'' inhabited marine regions of the Aegean Sea. ''Alosa macedonica'' have teeth in the Palatine bone, palatine and vomer. They have approximately 50 vertebrae and 106-128 gill rakers. They are about 181-230mm in length and spawn Spawn or spawning may refer to: * Spawn (biology), the eggs and sperm of aquatic animals Arts, entertainment, and media * Spawn (character), a fictional character in the comic series of the same name and in the associated franchise ** '' Spawn: Ar ... around the months of July and August. Apart from Lake Volvi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decio Vinciguerra
Decio Vinciguerra (23 May 1856 – 5 October 1934) was an Italian physician and ichthyologist who for many years was Director of the Aquarium of Rome. Early years Decio Vinciguerra was born in Genoa on 23 May 1856. He studied at the University of Genoa, and in 1878 obtained a degree in Medicine and Surgery. Immediately after graduating he was appointed assistant to the Chair of Zoology and Comparative Anatomy in the University of Genoa. He was naturally attracted to zoology, which he studied further, obtaining a doctorate degree. He became a botanist and a zoologist with particular interest in ichthyology. Vinciguerra was a member of the Italian expedition to Tierra del Fuego in 1882 led by Giacomo Bove. Although officially both zoologist and botanist, in fact Carlos Luigi Spegazzini from Buenos Aires handled the botanical work. The geologist Domenico Lovisato and the hydrologist Giovanni Roncagli made up the scientific party. Vinciguerra made valuable collections and observ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vomer
The vomer (; lat, vomer, lit=ploughshare) is one of the unpaired facial bones of the skull. It is located in the midsagittal line, and articulates with the sphenoid, the ethmoid, the left and right palatine bones, and the left and right maxillary bones. The vomer forms the inferior part of the nasal septum in humans, with the superior part formed by the perpendicular plate of the ethmoid bone. The name is derived from the Latin word for a ploughshare and the shape of the bone. In humans The vomer is situated in the median plane, but its anterior portion is frequently bent to one side. It is thin, somewhat quadrilateral in shape, and forms the hinder and lower part of the nasal septum; it has two surfaces and four borders. The surfaces are marked by small furrows for blood vessels, and on each is the nasopalatine groove, which runs obliquely downward and forward, and lodges the nasopalatine nerve and vessels. Borders The ''superior border'', the thickest, presents a dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerable Biota Of Europe
Vulnerable may refer to: General *Vulnerability *Vulnerability (computing) *Vulnerable adult *Vulnerable species Music Albums * ''Vulnerable'' (Marvin Gaye album), 1997 * ''Vulnerable'' (Tricky album), 2003 * ''Vulnerable'' (The Used album), 2012 Songs * "Vulnerable" (Roxette song), 1994 * "Vulnerable" (Selena Gomez song), 2020 * "Vulnerable", a song by Secondhand Serenade from ''Awake'', 2007 * "Vulnerable", a song by Pet Shop Boys from '' Yes'', 2009 * "Vulnerable", a song by Tinashe from '' Black Water'', 2013 * "Vulnerability", a song by Operation Ivy from ''Energy'', 1989 Other uses * Climate change vulnerability, vulnerability to anthropogenic climate change In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to E ... used in discussion of society's response to climate change * Vu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vulnerable Fish
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 1245 vulnerable fish species. 8.1% of all evaluated fish species are listed as vulnerable. The IUCN also lists eight fish subspecies as vulnerable. Of the subpopulations of fishes evaluated by the IUCN, 18 species subpopulations have been assessed as vulnerable. For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild". ''Endangered'' and ''critically endangered'' species also meet the quantitative criteria of ''vulnerable'' species, and are listed separately. See: List of endangered fishes, List of critically endangered fishes. Vulnerable, endangered and critically endangered species are collectively referred to as ''threatened species'' by the IUCN. Additionally 3191 fish species (21% of those evaluated) are listed as '' data deficient'', meaning there is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of Europe
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include non- salty mineral-rich waters such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fauna Of Greece
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are 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 be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Koronia
Lake Koroneia ( el, Λίμνη Κορώνεια) is a lake in the heart of the Thessaloniki regional unit in the Mygdonian basin in Greece. It is also known as Lake Agios Vasileios after the village Agios Vasileios and as Lake Langadas after the town Langadas, and is located about 14 kilometres east of Thessaloniki city centre. The motorway Egnatia Odos passes along the north side of the lake, and the old Greek National Road 2 passes along the south side. The lake is shared by the Communities and Municipalities of Greece, municipalities Langadas Lagkadas ( el, Λαγκαδάς, ) is a town and municipality in the northeast part of Thessaloniki regional unit, Greece. There are 41103 residents in the municipality and 7764 of them live in the town of Lagkadas. Lagkadas is located northeast o ... and Volvi (municipality), Volvi. A million years ago, Lake Koroneia along with Lake Volvi and all of the Mygdonian basin was a single large lake. Since then, its area has declined and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spawn (biology)
Spawn is the Egg cell, eggs and Spermatozoa, sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquatic mammals and marine reptile, reptiles, reproduce through the process of spawning. Spawn consists of the reproductive cells (gametes) of many aquatic animals, some of which will become fertilized and produce offspring. The process of spawning typically involves females releasing Ovum, ova (unfertilized eggs) into the water, often in large quantities, while males simultaneously or sequentially release spermatozoa (milt) to fertilize the eggs. Most fish reproduce by spawning, as do most other aquatic animals, including crustaceans such as crabs and shrimps, molluscs such as oysters and squid, echinoderms such as sea urchins and sea cucumbers, amphibians such as frogs and newts, aquatic insects such as mayflies and mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill Raker
Gill rakers in fish are bony or cartilaginous processes that project from the branchial arch (gill arch) and are involved with suspension feeding tiny prey. They are not to be confused with the gill filaments that compose the fleshy part of the gill used for gas exchange. Rakers are usually present in two rows, projecting from both the anterior and posterior side of each gill arch. Rakers are widely varied in number, spacing, and form. By preventing food particles from exiting the spaces between the gill arches, they enable the retention of food particles in filter feeders. The structure and spacing of gill rakers in fish determines the size of food particles trapped, and correlates with feeding behavior. Fish with densely spaced, elongated, comb-like gill rakers are efficient at filtering tiny prey, whereas carnivores and omnivores often have more widely spaced gill rakers with secondary projections. Because gill raker characters often vary between closely related taxa, they are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palatine Bone
In anatomy, the palatine bones () are two irregular bones of the facial skeleton in many animal species, located above the uvula in the throat. Together with the maxillae, they comprise the hard palate. (''Palate'' is derived from the Latin ''palatum''.) Structure The palatine bones are situated at the back of the nasal cavity between the maxilla and the pterygoid process of the sphenoid bone. They contribute to the walls of three cavities: the floor and lateral walls of the nasal cavity, the roof of the mouth, and the floor of the orbits. They help to form the pterygopalatine and pterygoid fossae, and the inferior orbital fissures. Each palatine bone somewhat resembles the letter L, and consists of a horizontal plate, a perpendicular plate, and three projecting processes—the pyramidal process, which is directed backward and lateral from the junction of the two parts, and the orbital and sphenoidal processes, which surmount the vertical part, and are separated by a dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landlocked
A landlocked country is a country that does not have territory connected to an ocean or whose coastlines lie on endorheic basins. There are currently 44 landlocked countries and 4 landlocked de facto states. Kazakhstan is the world's largest landlocked country while Ethiopia is the world’s most populous landlocked country. In 1990, there were only 30 landlocked countries in the world. The dissolutions of the Soviet Union and Czechoslovakia; the breakup of Yugoslavia; the independence referendums of South Ossetia (partially recognized), Eritrea, Montenegro, South Sudan, and the Luhansk People's Republic (partially recognized); and the unilateral declaration of independence of Kosovo (partially recognized) created 15 new landlocked countries and 5 partially recognized landlocked states while the former landlocked country of Czechoslovakia ceased to exist on 1 January 1993. On 5 October 2022, the Luhansk People's Republic was annexed by Russia and ceased to exist as a de fact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aegean Sea
The Aegean Sea ; tr, Ege Denizi (Greek language, Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish language, Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some 215,000 square kilometres. In the north, the Aegean is connected to the Marmara Sea and the Black Sea by the straits of the Dardanelles and the Bosphorus. The Aegean Islands are located within the sea and some bound it on its southern periphery, including Crete and Rhodes. The sea reaches a maximum depth of 2,639m to the west of Karpathos. The Thracian Sea and the Sea of Crete are main subdivisions of the Aegean Sea. The Aegean Islands can be divided into several island groups, including the Dodecanese, the Cyclades, the Sporades, the Saronic Islands, Saronic islands and the North Aegean islands, North Aegean Islands, as well as Crete and its surrounding islands. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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