![]() They also associate with drifting flotsam such as logs and pallets, and sonic tagging indicates some follow moving vessels. They are often associated with various species of dolphins or porpoises, as well as with larger marine creatures such as whales and whale sharks. They sometimes school with other tuna species and mixed schools of small yellowfin, and skipjack tuna, in particular, are commonplace. Yellowfin tuna often travel in schools with similarly sized companions. Yellowfin may venture well inshore of the continental shelf when water temperature and clarity are suitable and food is abundant. Mid-ocean islands such as the Hawaiian archipelago, other island groups in the Western Pacific, Caribbean, and Maldives islands Indian Ocean, as well as the volcanic islands of the Atlantic such as Ascension Island and Saint Helena, often harbor yellowfin feeding on the baitfish these spots concentrate close to the shoreline. Schooling yellowfin tuna Behavior Īlthough mainly found in deep offshore waters, yellowfin tuna may approach shore when suitable conditions exist. The maximum dive depth measured in a second study was 1,592 m (5,223 ft). An individual tagged in the Indian Ocean with an archival tag spent 85% of its time in depths shallower than 75 m (246 ft), but was recorded as having made three dives to 578, 982, and 1,160 m (3,810 ft). Īlthough yellowfin tuna penetrate the thermocline relatively infrequently, they are capable of diving to considerable depths. Sonic tracking has found that although yellowfin tuna, unlike the related bigeye tuna, mostly range in the top 100 m (330 ft) of the water column, another study reported that depth tends to vary with time of day: 90% of their recorded depth values were shallower than 88 m (289 ft) during the night, and shallower than 190 m (620 ft) during the day. ![]() Yellowfin tuna are epipelagic fish that inhabit the mixed surface layer of the ocean above the thermocline. The fisherman received a prize of $1 million once the catch was confirmed by the IGFA. The all-tackle International Game Fish Association (IGFA) record for this species stands at 193.68 kg (427.0 lb) for a yellowfin caught in 2012 off Cabo San Lucas, Mexico. Reported sizes in the literature have ranged as high as 2.4 m (7 ft 10 in) in length and 200 kg (440 lb) in weight. ![]() The main body is a very dark metallic blue, changing to silver on the belly, which has about 20 vertical lines. The pectoral fins are also longer than the related bluefin tuna, but not as long as those of the albacore. The second dorsal and anal fins can be very long in mature specimens, reaching almost as far back as the tail and giving the appearance of sickles or scimitars. The second dorsal fin and the anal fin, as well as the finlets between those fins and the tail, are bright yellow, giving this fish its common name. The yellowfin tuna is among the larger tuna species, reaching weights over 180 kg (400 lb), but is significantly smaller than the Atlantic and Pacific bluefin tunas, which can reach over 450 kg (990 lb), and slightly smaller than the bigeye tuna and the southern bluefin tuna. The species name, albacares ("white meat") can also lead to confusion: in English, the albacore ( Thunnus alalunga) is a different species, while yellowfin is officially designated albacore in French and referred to as albacora by Portuguese fishermen. Yellowfin is often marketed as ahi, from the Hawaiian ʻahi, a name also used there for the closely related bigeye tuna. The yellowfin tuna ( Thunnus albacares) is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide. Neothunnus brevipinna Bellón & Bàrdan de Bellón, 1949.Thunnus zacalles (Jordan & Evermann, 1926). ![]()
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