Anguilla - Sidhat - 鳗鱼 - Eel
Scientific classification Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Subclass: Neopterygii Order: Anguilliformes Suborder: Anguilloidei Family: Anguillidae Genus: Anguilla Schrank, 1798 |
Anguillidae (鰻鱺科) is a family of fishes that contains the freshwater eels (淡水鳗鱼) (淡水鳗、白鳝、白鳗、河鳗、鳗鲡、青鳝、风馒、日本鳗。). There are 19 species/subspecies in this family, all in genus Anguilla (鳗鲡属) (鳗鱼、白鳝、白鳗、河鳗、鳗鲡、青鳝、风馒、日本鳗。). Freshwater Eel (淡水鳗鱼) They are catadromous, meaning they spend their lives in freshwater rivers, lakes, or estuaries and return to the ocean to spawn. The young eel larvae, called leptocephali, live only in the ocean and consume small particles called marine snow. They grow larger in size, and in their next growth stage they are called glass eels (玻璃鳗). At this stage they enter estuaries and when they become pigmented they are known as elvers (鳗线). Elvers travel upstream in freshwater rivers where they grow to adulthood. Some details of eel reproduction are as yet unknown, and the discovery of the spawning area of the American and European eels in the Sargasso Sea is one of the more famous anecdotes in the history of Ichthyology. See Eel life history. The spawning areas of some other anguillid eels, such as the Japanese eel, and the giant mottled eel were also discovered recently in the western North Pacific Ocean.
Freshwater eels are elongate with tubelike, snake-shaped bodies. They have large, pointed heads and their dorsal fins are usually continuous with their caudal fins and anal fins, to form a fringe lining the posterior end of the body. They have small pectoral fins to help them navigate along river bottoms. Their scales are thin and soft. Anguillid eels are important food fish. Eel aquaculture is a fast-growing industry. Important food eel species include longfin eel, Australian long-finned eel, short-finned eel, and Japanese eel. Most eel production historically has been in Japan, Korea and Taiwan, but in recent years the greatest amount of production has been in China. Seafood watch, one of the most well known sustainable seafood advisory lists, recommends that consumers avoid eating anguillid eels due to significant pressures on worldwide populations. Several species used as unagi have seen their population sizes greatly reduced in the past half century. Catches of the European Eel, for example, have declined about 80% since the 1960's. Although about 90% of freshwater eel consumed in the U.S. are farm-raised, they are not bred in captivity. Instead, young eels are collected from the wild and then raised in various enclosures. In addition to wild eel populations being reduced by this process, eels are often farmed in open net pens which allow parasites, waste products, and diseases to flow directly back into wild eel habitat, further threatening wild populations. Freshwater eels are carnivores and as such are fed other wild-caught fish, adding an additional element of unsustainability to current eel farming practices. Species
Japanese eel, Anguilla japonica 日本鰻鱺; 日本鳗; 白鳗; 白鳝; 河鳗; 鳗鱼; 青鳝; 风馒 References
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Anguillidae - Freshwater Eels - Anguilles d'eau douce Freshwater eels are found world-wide in temperate to tropical waters except for the south Atlantic Ocean and the whole eastern Pacific Ocean. There are 16 species with 1 occurring in Canada and the NCR. The term eel-like is based on the body shape of freshwater eels and includes the muscular slipperiness associated with this fish and its mucus-producing skin. Both dorsal and anal fins are long and join the tail fin. The dorsal fin begins well behind the pectoral fin level. There are no pelvic fins and the pectorals, when present, are on mid-flank. Scales are absent or when present small, embedded and cycloid. There is a lateral line. Jaws are strong and toothed. The gill openings are small and just in front of the pectoral fins. The anterior nostril is tubular The life cycle of eels was unknown until Johannes Schmidt published his 1922 study based on years of collecting. Where the adults went on their seaward migration and where the elvers ascending rivers came from were a mystery. These eels are catadromous, living in freshwater but migrating to the sea to spawn and die. In the North Atlantic Ocean spawning occurs in the Sargasso Sea. The young eels or leptocephali (= thin head larvae) are distinctive being transparent and leaf-like. A newspaper can be read through the body of a leptocephalus. In this form they drift to the shores of America and Europe, transform into elvers with the more familiar eel-shape and move into rivers and lakes to feed and grow. The biology of eels is based almost entirely on the freshwater phase of their life. Adults in freshwater develop large eyes, the gut degenerates and coloration changes in preparation for the migration to the Sargasso Sea. Adults were only caught in the deep ocean, at nearly 2000 m near the Bahamas, in 1977. The Sargasso spawning ground is deduced from collections of larvae across the Atlantic Ocean - the smallest and youngest larvae are found around the Sargasso Sea. The spawning grounds are at about 400 m, at a 17°C temperature and in saltier water than usual sea conditions according to some authors but since spawning adults have never been caught this remains dubious. The theory advanced by D. W. Tucker in 1959 maintained that European Eels lack the energy resources in their migratory, spawning phase to reach the Sargasso Sea 7000 km from Europe. They are presumed to be following an instinct to head out to sea, dating from an earlier geological age when the Atlantic Ocean was narrower before the separation caused by Continental Drift. All European Eels die at sea and Europe is restocked by larvae drifting there spawned from American parents. The American populations are closer to the Sargasso and can make the journey easily. Differences between American and European eels are merely the consequence of different environmental regimes in different parts of the Sargasso. This theory has not found general acceptance but, if true, means that all European Eels can be harvested for food without depleting stocks. Eels are valued as food, particularly in Europe and Japan, but are not used as extensively in North America. |
What is the Size of an Eel?Composed of 4 suborders, 19 families, 100 genera and roughly 800 species, the Anguilliformes or Eels are one of the largest orders of fish in the world. In terms of what is the size of an eel, it depends on the species, but their length ranges from 5 centimeters (2.0 inches) to as large as 3.75 meters (12.3 feet). The Anguillidae family of freshwater eels belongs to the suborder Anguilloidei, and is made up of 19 species and subspecies. Among these is Anguilla anguilla, the European eel, which is typically 60 to 80 cm long, though it is known in rare occasions to reach 1 ½ meters in length. Anguilla bengalensis bengalensis, the Indian mottled eel, can grow as long as 1.2 m and weigh up to 6 kilograms. Anguilla bengalensis labiata, the African mottled eel, has an average length of 1.75 m and an average weight of 20 kg. Still part of the Anguillidae family, the Indonesian shortfin eel (Anguilla bicolor bicolor) has an average lifespan of 20 years and grows up to a length of 1.2 m. The New Zealand longfin eel (Anguilla dieffenbachii) has a common length of 1.2 m and a common weight of 10 kg, but can, in certain cases, achieve a size of 2 m and weigh more than 50 kg (the female of the species is normally twice longer than the male). The American eel (Anguilla rostrata) holds the world weight record at 9.25 pounds. Of the Moray eels of the Muraenidae family, the smallest would be the Snyder’s Moray (Anarchias leucurus) at 11.5 cm long (4.5 in), while the Slender giant moray (Strophidon sathete) is the longest at 4 m (13 ft). In terms of mass, the largest would be the Giant moray (Gymnothorax javanicus), which can grow up to nearly 3 m (9.8 ft) in length and above 36 kg (79 lbs) in weight. The False morays of the Chlopsidae family are so-named because of their resemblance to the morays, except that they are considerably smaller, ranging in size between 11 to 42 cm (4.3-17 in). Also known as Worm eels, as well as Spaghetti eels, the Moringuidae family ranges in size from around 15 to 140 cm (5.9-55 in). The Mud eels of the Heterenchelyidae family vary in length from 32 to 149 cm (13-59 in). The largest member of the Congroidei suborder’s Congridae family, the European conger (Conger conger) is known to grow up to a length of 3 m (9.8 ft) and weigh 160 kg (350 lbs). The Pike conger of the Muraenesocidae family ranges in length from 60 to 250 cm (2.0-8.2 ft). The Longneck eels of the Derichthyidae family can reach a size of around 60 cm (24 in). The interestingly-named Witch eels or Duckbill eels of the Nettastomatidae family have a maximum length of 125 cm (4.10 ft). The Snake eels of the family Ophichthidae (appropriately taken from the Greek words “ophis” meaning “snake” and “ichthys” meaning fish) average 10 cm (3.9 in) up to 3 m long (9.8 ft). And from the suborder Synaphobranchoidei, the Cutthroat eels of the Synaphobranchidae family range in length from 23 to 160 cm (9.1-63 in). It should be noted that certain other marine creatures usually referred to as eels should not truly be classified as such. For instance, the Electric eel is actually a relative of the catfish, while the Lamprey eel is an aquatic parasite and not even really a fish. At any rate, the rest of the examples given are only a few of the staggering number of suborders, families and species of the Anguilliformes order. |
科名 | 科中文名 | 學名 | 命名者 | 大陸中文名 | 臺灣中文名 |
Anguillidae | 鰻鱺科 | Anguilla ancestralis | Ege, 1939 | 原鰻鱺 | 原鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla anguilla | (Linnaeus, 1758) | 歐洲鰻鱺 | 歐洲鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla aucklandii | Kichardson, 1848 | 奧克蘭鰻鱺 | 奧克蘭鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla australis australis | Richardson, 1841 | 澳洲鰻鱺 | 澳洲鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla australis occidentalis | Schmidt, 1928 | 短鰭澳洲鰻鱺 | 短鰭澳洲鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla australis schmidti | Phillipps, 1925 | 新澳鰻鱺 | 新澳鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla bengalensis bengalensis | (Gray, 1831) | 孟加拉鰻鱺 | 孟加拉鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla bengalensis labiata | (Peters, 1852) | 東印度洋鰻鱺 | 東印度洋鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla bicolor bicolor | McClelland, 1844 | 雙色鰻鱺 | 雙色鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla bicolor pacifica | Schmidt, 1928 | 太平洋雙色鰻鱺 | 二色鰻 |
Anguillidae | 鰻鱺科 | Anguilla borneensis | Popta, 1924 | 加里曼丹鰻鱺 | 加里曼丹鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla breviceps | Chu et Jin, 1984 | 短頭鰻鱺 | 短頭鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla celebensis | Kaup, 1856 | 蘇拉威西鰻鱺 | 蘇拉威西鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla dieffenbachii | Gray, 1842 | 大鰻鱺 | 大鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla elphinstonei | Sykes, 1839 | 疏斑鰻鱺 | 疏斑鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla foochowensis | Chu et Jin, 1984 | 福州鰻鱺 | 福州鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla interioris | Whitley, 1938 | 內唇鰻鱺 | 內唇鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla japonica | Temminck & Schlegel, 1846 | 日本鰻鱺 | 日本鰻 |
Anguillidae | 鰻鱺科 | Anguilla malgumora | Kaup, 1856 | 印尼鰻鱺 | 印尼鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla marmorata | Quoy & Gaimard, 1824 | 花鰻鱺 | 鱸鰻 |
Anguillidae | 鰻鱺科 | Anguilla mauritiana | Bennett, 1831 | 毛里求斯鰻鱺 | 毛里求斯鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla megastoma | Kaup, 1856 | 大口鰻鱺 | 大口鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla mossambica | (Peters, 1852) | 莫桑比克鰻鱺 | 莫桑比克鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla nebulosa | McClelland, 1844 | 雲紋鰻鱺 | 雲紋鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla nigricans | Chu et Wu, 1984 | 烏耳鰻鱺 | 烏耳鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla obscura | Günther, 1872 | 灰鰻鱺 | 灰鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla reinhardtii | Steindachner, 1867 | 寬鰭鰻鱺 | 寬鰭鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla rostrata | (LeSueur, 1817) | 美洲鰻鱺 | 美洲鰻鱺 |
Anguillidae | 鰻鱺科 | Anguilla sinensis | McClelland, 1844 | 中華鰻鱺 | 中華鰻鱺 |
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List of Nominal Species of Anguillidae (Freshwater eels)
Nominal Species (n = 119) | Present allocation (n = 23) | Ref. |
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Anguilla acutirostris Risso, 1827 | Anguilla anguilla | 594 |
Anguilla aegyptiaca Kaup, 1856 | Anguilla anguilla | 594 |
Anguilla altirostris Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla amblodon Günther, 1867 | Anguilla bicolor bicolor | 3506 |
Anguilla ancestralis Ege, 1939 | Anguilla celebesensis | 7050 |
Anguilla ancidda Kaup, 1856 | Anguilla anguilla | 10733 |
Muraena anguilla Linnaeus, 1758 | Anguilla anguilla | 13696 |
Muraena anguilla maculata Chiereghini, 1872 | Anguilla anguilla | 13696 |
Anguilla anguilla var. macrocephala De la Pylaie, 1835 | Anguilla anguilla | 13696 |
Tribranchus anguillaris Peters, 1846 | Anguilla mossambica | 3506 |
Muraena argentea Lesueur, 1817 | Anguilla rostrata | 58454 |
Anguilla arracana McClelland, 1844 | Anguilla bengalensis bengalensis | 41236 |
Anguilla aterrima Rafinesque, 1820 | Anguilla rostrata | 58454 |
Anguilla australis Richardson, 1841 | Anguilla australis australis | 5259 |
Anguilla australis occidentalis Schmidt, 1928 | Anguilla australis australis | 7300 |
Muraena bengalensis Gray, 1831 | Anguilla bengalensis bengalensis | 4832 |
Anguilla bibroni Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla bicolor McClelland, 1844 | Anguilla bicolor bicolor | 3506 |
Anguilla bleekeri Kaup, 1856 | Anguilla bicolor bicolor | 3506 |
Anguilla blephura Rafinesque, 1817 | Anguilla rostrata | 58454 |
Anguilla borneensis Popta, 1924 | Anguilla malgumora | 9828 |
Muraena bostoniensis Lesueur, 1817 | Anguilla rostrata | 58454 |
Anguilla breviceps Chu & Jin, 1984 | Anguilla breviceps | 56787 |
Anguilla brevirostris Cisternas, 1877 | Anguilla anguilla | 10733 |
Leptocephalus brevirostris Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla callensis Guichenot, 1850 | Anguilla anguilla | 594 |
Anguilla canariensis Valenciennes, 1843 | Anguilla anguilla | 594 |
Anguilla cantori Kaup, 1856 | Anguilla bicolor bicolor | 3506 |
Anguilla capensis Kaup, 1860 | Anguilla mossambica | 3506 |
Anguilla capitone Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla celebesensis Kaup, 1856 | Anguilla celebesensis | 7050 |
Anguilla chrisypa Rafinesque, 1817 | Anguilla rostrata | 58454 |
Anguilla cloacina Bonaparte, 1846 | Anguilla anguilla | 10733 |
Anguilla cubana Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla cuvieri Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla delalandi Kaup, 1856 | Anguilla mossambica | 56787 |
Anguilla dieffenbachii Gray, 1842 | Anguilla dieffenbachii | 11115 |
Anguilla dussumieri Kaup, 1856 | Anguilla bicolor bicolor | 3506 |
Anguilla elphinstonei Sykes, 1839 | Anguilla nebulosa | 6028 |
Anguilla elphinstonei Sykes, 1839 | Anguilla bengalensis bengalensis | 41236 |
Anguilla eurystoma Heckel & Kner, 1858 | Anguilla anguilla | 10733 |
Anguilla fluviatilis Gistel, 1848 | Anguilla anguilla | 80565 |
Anguilla fluviatilis Anslijin, 1828 | Anguilla anguilla | 10733 |
Anguilla fluviatilis Heckel & Kner, 1858 | Anguilla anguilla | 13696 |
Leptocephalus grassii Eigenmann & Kennedy, 1902 | Anguilla rostrata | 58454 |
Anguilla hibernica Couch, 1865 | Anguilla anguilla | 10733 |
Anguilla hildebrandti Peters, 1881 | Anguilla marmorata | 3506 |
Anguilla huangi Teng, Lin & Tzeng, 2009 | Anguilla luzonensis | 85815 |
Anguilla interioris Whitley, 1938 | Anguilla interioris | 9828 |
Anguilla japonica Temminck & Schlegel, 1846 | Anguilla japonica | 559 |
Anguilla johannae Günther, 1867 | Anguilla marmorata | 3506 |
Anguilla kieneri Kaup, 1856 | Anguilla anguilla | 10733 |
Muraena labiata Peters, 1852 | Anguilla bengalensis labiata | 33390 |
Anguilla laticanda Rafinesque, 1818 | Anguilla rostrata | 58454 |
Anguilla laticauda Rafinesque, 1818 | Anguilla rostrata | 58454 |
Anguilla latirostris Risso, 1827 | Anguilla anguilla | 594 |
Anguilla linnei Malm, 1877 | Anguilla anguilla | 13696 |
Anguilla lutea Rafinesque, 1820 | Anguilla rostrata | 58454 |
Anguilla luzonensis Watanabe, Aoyama & Tsukamoto, 2009 | Anguilla luzonensis | 83381 |
Muraena macrocephala Lesueur, 1817 | Anguilla rostrata | 58454 |
Muraena macrocephala Rapp, 1849 | Anguilla bicolor bicolor | 3506 |
Muraena macrophthalma Peters, 1852 | Anguilla bengalensis labiata | 3506 |
Anguilla macrops Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla malabarica Kaup, 1856 | Anguilla bicolor bicolor | 3506 |
Anguilla malgumora Kaup, 1856 | Anguilla malgumora | 9828 |
Muraena manillensis Bleeker, 1864 | Anguilla marmorata | 58462 |
Anguilla marginata Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla marina Nardo, 1860 | Anguilla anguilla | 13696 |
Anguilla marmorata Quoy & Gaimard, 1824 | Anguilla marmorata | 3506 |
Anguilla mauritiana Bennett, 1831 | Anguilla marmorata | 3506 |
Anguilla mediorostris Risso, 1827 | Anguilla anguilla | 10733 |
Anguilla megastoma Kaup, 1856 | Anguilla megastoma | 2847 |
Anguilla melanochir Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla microptera Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla migratoria Krøyer, 1846 | Anguilla anguilla | 10733 |
Anguilla moa Bleeker, 1850 | Anguilla bicolor bicolor | 41236 |
Anguilla morena Kaup, 1856 | Anguilla anguilla | 10733 |
Muraena mossambica Peters, 1852 | Anguilla mossambica | 33390 |
Anguilla mowa Bleeker, 1853 | Anguilla bicolor bicolor | 41236 |
Anguilla nebulosa McClelland, 1844 | Anguilla nebulosa | 6028 |
Anguilla nebulosa nebulosa McClelland, 1844 | Anguilla bengalensis bengalensis | 41236 |
Neoanguilla nepalensis Shrestha, 2008 | Neoanguilla nepalensis | 85009 |
Anguilla nigricans Chu & Wu, 1984 | Anguilla nigricans | 33340 |
Anguilla nilotica Heckel, 1846 | Anguilla anguilla | 594 |
Anguilla nilotica Kaup, 1857 | Anguilla anguilla | 13696 |
Anguilla novaeorleanensis Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla novaeterrae Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla oblongirostris Blanchard, 1866 | Anguilla anguilla | 13696 |
Anguilla obscura Günther, 1872 | Anguilla obscura | 9828 |
Anguilla oxycephala De la Pylaie, 1835 | Anguilla anguilla | 80565 |
Muraena oxyrhina Ekström, 1831 | Anguilla anguilla | 10733 |
Anguilla pacifica Schmidt, 1928 | Anguilla bicolor pacifica | 2858 |
Anguilla platycephala Kaup, 1856 | Anguilla anguilla | 10733 |
Muraena platyrhina Ekström, 1831 | Anguilla anguilla | 10733 |
Anguilla platyrhynchus Costa, 1850 | Anguilla anguilla | 10733 |
Anguilla platyura De la Pylaie, 1835 | Anguilla anguilla | 80565 |
Anguilla punctatissima Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla reinhardtii Steindachner, 1867 | Anguilla reinhardtii | 5259 |
Anguilla remifera Jordan & Evermann, 1902 | Anguilla japonica | 55073 |
Muraena rostrata Lesueur, 1817 | Anguilla rostrata | 12965 |
Anguilla savignyi Kaup, 1856 | Anguilla anguilla | 10733 |
Anguilla schmidti Phillipps, 1925 | Anguilla australis schmidti | 46206 |
Anguilla septembrina Bonaparte, 1846 | Anguilla anguilla | 13696 |
Muraena serpentina Lesueur, 1817 | Anguilla rostrata | 58454 |
Anguilla spengeli Weber, 1912 | Anguilla bicolor bicolor | 7050 |
Anguilla tenuirostris DeKay, 1842 | Anguilla rostrata | 58454 |
Anguilla texana Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla tyrannus Girard, 1858 | Anguilla rostrata | 58454 |
Anguilla variegata McClelland, 1844 | Anguilla bengalensis bengalensis | 41236 |
Muraena virescens Peters, 1852 | Anguilla bicolor bicolor | 3506 |
Anguilla vulgaris Rafinesque, 1810 | Anguilla anguilla | 80565 |
Anguilla vulgaris Shaw, 1803 | Anguilla anguilla | 13696 |
Anguilla vulgaris fluviatilis Rafinesque, 1810 | Anguilla anguilla | 13696 |
Anguilla vulgaris lacustus Rafinesque, 1810 | Anguilla anguilla | 13696 |
Anguilla vulgaris macrocephala De la Pylaie, 1835 | Anguilla anguilla | 80565 |
Anguilla vulgaris marina Rafinesque, 1810 | Anguilla anguilla | 13696 |
Anguilla vulgaris platyura De la Pylaie, 1835 | Anguilla anguilla | 10733 |
Anguilla wabashensis Kaup, 1856 | Anguilla rostrata | 58454 |
Anguilla xanthomelas Rafinesque, 1820 | Anguilla rostrata | 58454 |
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