oceanic, above and below the thermocline. The thermal boundaries of occurrence
are roughly 18° and 31°C. Vertical distribution appears to be influenced
by the thermal structure of the water column, as is shown by the close correlation
between the vulnerability of the fish to purse seine capture, the depth of the
mixed layer, and the strength of the temperature gradient within the thermocline.
Yellowfin tuna are essentially confined to the upper 100 m of the water column
in areas with marked oxyclines, since oxygen concentrations less than 2 ml/l
encountered below the thermocline and strong thermocline gradients tend to exclude
their presence in waters below the discontinuity layer. Larval distribution
in equatorial waters is transoceanic the year round, but there are seasonal
changes in larval density in subtropical waters. It is believed that the larvae
occur exclusively in the warm water sphere, that is, above the thermocline.
Schooling occurs more commonly in near-surface waters, primarily by size, either
in monospecific or multispecies groups. In some areas, i.e. eastern Pacific,
larger fish (greater than 85 cm fork length) frequently school with porpoises.
Association with floating debris and other objects is also observed. Although
the distribution of yellowfin tuna in the Pacific is nearly continuous, lack
of evidence for long-ranging east-west or north-south migrations of adults suggests
that there may not be much exchange between the yellowfin tuna from the eastern
and the central Pacific, nor between those from the western and the central
Pacific. This hints at the existence of subpopulations. Spawning occurs throughout
the year in the core areas of distribution, but peaks are always observed in
the northern and southern summer months respectively. Joseph (1968) gives a
relationship between size and fecundity of yellowfin tuna in the eastern Pacific.
Frozen: W/R. IQF at -40C*
Quality: Good (Special for Europeans canneries requirements)
Supply Time: All year round
Sizes: From 30kgs to 120kgs Product Code G8009
ARGENTINA : Aleta amarilla.
AUSTRALIA : Yellowfinned albacore.
BRAZIL : Albacora de lage.
CUBA : Atun de aleta amarilla.
FRANCE : Thon a nageoires jaunes.
GERMANY : Gelbflossenthun.
GREECE : Tonnos macropteros.
INDIA : Howalla, Kelawalla (Sinhalese) .
ITALY : Tonne albacora.
JAPAN : Hatsu, Kihada, Kimeji (young) , Kiwada.
MALTA : Tonn.
MARTINIQUE : Albacore, Z'aile jaune.
NETHERLANDS : Geelvintonijn.
NORWAY : Albakor.
PACIFIC ISLANDS TRUST TERRITORIES : Palau: Tkuu.
PHILIPPINES : Albaeora, Badla-an, Buys, Tambakol.
POLAND : Albakora.
PORTUGAL : Atum albacora, Atum rabil, Peixinho da ilho.
ROMANIA : Albacora, Ton galben.
SENEGAL : Albacore, Doullou-doullou (Ouoloff) , Thon a nageoires jaunes, Wakhandor
SOUTH AFRICA : Geelvin-tuna, Yellowfin tuna.
SPAIN : Rabil.
SWEDEN : Albacora.
UK : Yellowfin tuna.
URUGUAY : Aleta amarilla.
USA : Yellowfin tuna, Hawaii: 'Ahi, Hawaii: Kahauli, Hawaii: Kanana, Hawaii:
Maha'o, Hawaii: Palaha.
former USSR : Albacor, Tikhookeanskij zheltoperyj tunets, Zheltoperyj tunets,
VENEZUELA : Atun aleta amarilla.
VIET NAM : Ca bo Vang.
YUGOSLAVIA : Tuna zutoperka
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