Bluefin tunas, for example, are found in Newfoundland and Iceland, and also in the tropical waters of the Gulf of Mexico and the Mediterranean Sea, where some individuals go each year to spawn.ĭue to overfishing, the range of this genus has declined significantly, having been effectively extirpated from the Black Sea, for example. The word Thunnus is the Middle Latin form of the Greek thýnnos ( θύννος, 'tuna, tunny') – which is in turn derived from thynō ( θύνω, 'to rush to dart').

The first written use of the word was by Homer. īased on morphology and short-length mitochondrial DNA sequence data, the genus Thunnus is currently classified into two subgenera: Thunnus (Thunnus) (the bluefin group), and Thunnus (Neothunnus) (the yellowfin group). However this classification has been questioned by a recent phylogenetic analysis of nuclear DNA sequence data, which resolved different relationships among species and did not support the traditional definition of the bluefin and yellowfin groups. Specifically, these analyses substantiated the division of Pacific and Atlantic Tuna in two separate species and suggested that Bigeye Tuna were actually a member of subgenus Neothunnus, not subgenus Thunnus. Earlier nuclear ribosomal DNA phylogenetic reconstructions also showed similar results. Until recently, seven Thunnus species were thought to exist, and Atlantic bluefin tuna and Pacific bluefin tuna were subspecies of a single species. Thunnus ( Neothunnus) – the yellowfin group In 1999, Collette established that based on both molecular and morphological considerations, they are, in fact, distinct species. The worldwide demand for sushi and sashimi, coupled with increasing population growth, has resulted in global stocks of the species being overfished and bluefin is the most endangered and considered 'a serious conservation concern'. Complicating the efforts for sustainable management of bluefin fish stocks within national exclusive economic zones ( EEZ) is bluefin migrate long distances and hunt in the midocean that is not part of any country's EEZ, so have been vulnerable to overfishing by multiple countries' fishing fleets. International agreements and conventions are good-faith agreements and are difficult to monitor or enforce. Though this fish has been farmed in captivity by the Japanese and by the Australians with the help of the Japanese, yields are lower than other farmed fish due to the slow growth rate of bluefin tuna, therefore keeping prices high. On December 30, 2012, a 222-kilogram (489 lb) bluefin tuna caught off northeastern Japan, was sold at the Tsukiji fish market in Tokyo for a record 155.4 million yen ($1.76 million) – a unit price of JP¥ 1.274 million/kg (US$3,600/lb). 'A compendium of fossil marine animal genera'. ^ θύννος in Liddell, Henry George Scott, Robert (1940) A Greek–English Lexicon, revised and augmented throughout by Jones, Sir Henry Stuart, with the assistance of McKenzie, Roderick.National council for Science and the Environment, Washington DC 'Sharing the water column: physiological mechanisms underlying species-specific habitat use in tunas'. In the Perseus Digital Library, Tufts University. ^ a b c Díaz-Arce, Natalia Arrizabalaga, Haritz Murua, Hilario Irigoien, Xabier Rodríguez-Ezpelata, Naiara (2016).'ROrthodox and unorthodox phylogenetic relationships among tunas revealed by the nucleotide sequence analysis of the mitochondrial DNA control region'. Compatible with Dragon or Monkey.'RAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas'. Motivated by money, can be greedy, is ever curious, seeks knowledge and welcomes challenges. They have excellent taste, are a good friend and are generous and loyal to others considered part of its pack. Those born under the Chinese Zodiac sign of the Rat are quick-witted, clever, charming, sharp and funny. Sagittarius-born are able to transform their thoughts into concrete actions and they will do anything to achieve their goals.Īkari Endo was born in the Year of the Rat. Sagittarius is extrovert, optimistic and enthusiastic, and likes changes. Their open mind and philosophical view motivates them to wander around the world in search of the meaning of life.

According to astrologers, Sagittarius is curious and energetic, it is one of the biggest travelers among all zodiac signs. Santo Domingo, Dominican Republic, Dominican RepublicĪkari Endo’s zodiac sign is Sagittarius. Novem( Santo Domingo, Dominican Republic, Dominican Republic)

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