tuna

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tuna

or

tunny,

game and food fishes, the largest members of the family Scombridae (mackerelmackerel,
common name for members of the family Scombridae, open-sea fishes including the albacore, bonito, and tuna. They are characterized by deeply forked tails that narrow greatly where they join the body; small finlets behind both the dorsal and the anal fins; and sleek,
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 family) and closely related to the albacore and bonito. They have streamlined bodies with two fins, and five or more finlets on the back. The body is very narrow in the tail region, and the tail is deeply forked.

The most important commercially of the group called little tunnies is the little tuna, or false albacore, Euthynnus alleteraturs, which averages 10 lb (4.5 kg) and is found in open Atlantic waters north to Cape Cod. The oceanic bonito, or skipjack, Katsuwonus pelamis, is a warm-water fish reaching 20 lb (9 kg) in weight. The albacore, or long-finned tuna, Thunnus alalunga (up to 60 lb/27 kg), is found in tropical and temperate ocean waters (including the Mediterranean); its flesh is marketed as "whitemeat tuna." The Atlantic bluefin tuna, T. thynnus, the largest of the great tunnies and the giant of bony fishes, averages 200 to 500 lb (90–225 kg) with adults sometimes reaching 14 ft (427 cm) and 3-4 tons (680 kg). The Pacific bluefin tuna, T. orientalis, of similar size, and the Altantic are sometimes treated as subspecies of the northern bluefin; both are found in the Northern Hemisphere. The southern bluefin, of the same genus but a little smaller, is found in the Southern Hemisphere. Bluefin are highly prized as sport fishes as well as by commerce. The yellowfin tuna, T. albacares, is smaller (125 lb/56 kg) and found in tropical and subtropical open ocean waters worldwide.

Tuna fisheries have been important commercially in Europe for centuries and are the backbone of a major canning industry on both coasts of North America. Tuna fishing is controlled by international agreements, but catch limits and other regulations have not been adhered to. As a result, some tuna fisheries have been overfished, and the albacore, bluefin, yellowfin, and other species are considered threatened. Another major marine conservation problem has been the use of huge drift nets to capture tuna, because the nets also trap and kill thousands of seals, dolphins, whales, and sea birds in the process. Although nets longer than 1.5 mi (2.4 km) have been banned worldwide, nets up to 20 mi (32 km) are still commonly used in defiance of the ban in parts of the world.

Tunas are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Perciformes, family Scombridae.

tuna

[′tü·nə]
(vertebrate zoology)
Any of the large, pelagic, cosmopolitan marine fishes which form the family Thunnidae including species that rank among the most valuable of food and game fish.

tuna

1
1. any of various large marine spiny-finned fishes of the genus Thunnus, esp T. thynnus, chiefly of warm waters: family Scombridae. They have a spindle-shaped body and widely forked tail, and are important food fishes
2. any of various similar and related fishes

tuna

2
1. any of various tropical American prickly pear cacti, esp Opuntia tuna, that are cultivated for their sweet edible fruits
2. the fruit of any of these cacti
References in periodicals archive ?
Two offshore Danish wind farms, Vindeby and Tuno Knob, have been operational since 1991 and 1995 respectively.
Health is Wealth, for instance, has a whole line of chicken-free nuggets and patties, and Worthington boasts Skallops and Tuno.
For the second day, there will be a "kawa" hot bath and fish spa at the Tuno; and a boodle lunch and pottery making at the Calawag Mountain Resort in Tibiao.
Narak Buntak, Pantang Runtop, Ingai Ungau, and Timor Bandang, my oldest acquaintances, still retained vivid memories of their childhood years spent in one of the big houses, or alai gayo, dotted around the district, either some distance from each other (such as Anak Tuno) or congregated in hamlets (such as the alai gayo of the present Mukim of Ukong).
Il saggio rintraccia le dinamiche affettive del vissuto della scrittrice italo-somala Igiaba Scego nella struttura di un libro--La mia casa e dove sono (2010)--pensato come mappa di due luoghi in dialogo Tuno con l'altro, Roma e Mogadiscio, fra memoria individuale ed epos familiare, fra scrittura autobiografica e narrazione orale, fra genealogia femminile e soggettivita nomade, fra ex impero ed ex colonia, in senso letterale e in senso esistenziale.
"Una de las funciones es que cuando alguien busca una receta le dice el nombre de cada tuno de los ingredientes, como se les conoce en los diferentes paises y la historia de este".
(3.) Mwandawiro C, Mboots M, Tuno N, Suwonkerd W, Tsuda Y, Takagi M.
Machado has found a way to surprise us, to keep our attention, and perhaps even to bring an occasional smile to our lips as he rhymes "no se" with "Jose," "librotes" with "papelotes," and, in a passage remarkable for its ingenuity, "es" with "frances," "tuno" with "Unamuno," and "aquel" with "Iramanuel." Several critics have alluded to the "tono humoristico" (Ortega 977) and "andadura juguetona" (Gutierrez Hernandez 325) of the poem without explaining how they are achieved.
(Se transforman.) Ahora, sin zambra ni gritos, decidme y esto, uno a uno, quien es el picaro, el tuno que causa tales garitos.
Esta vegetacion es tipica de bosques secundarios jovenes (40 anos), donde se encuentran especies juveniles como: encenillo (Weinmannia tomentosa), gaque (Clusia multiflora), arrayan (Myrcianthes leucoxyla) y tuno (Miconia spp.).
Pero, a causa del alejamiento de los multiples territorios del Imperio espanol, donde las distancias se median en semanas de navegacion, era imposible la estancia del rey en cada tuno de ellos y hubiera sido muy complicado y dispendioso crear un sistema de rotacion de la corte, en las capitales de las diferentes provincias, durante intervalos temporales mas o menos largos.
Se presenta ROMERO de tuno, con la tirana de Pascua.