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Thunnus orientalis (Temminck &. Schlegel, 1844)
NORTHERN BLUEFIN TUNA
Pacific Bluefin Tuna; Thunnus thynnus orientalis Temminck and Schlegel, 1844; Thunnus thynnus Linnaeus, 1758; Thynnus orientalis Temminck and Schlegel, 1844

Life   Vertebrata   Fish   Scombridae   Thunnus

Thunnus orientalis
© Copyright IATTC 1999, 2006 · -3
Thunnus orientalis

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Overview
Main identification features
  • 1st dorsal fin : yellow; 2nd dorsal fin : brown
  • pectoral: short, not passing 1st dorsal fin
  • a: yellow + black edge
Dorsal fins close together, the first with prolonged spines anteriorly; first dorsal with XI-XIV spines; second dorsal and anal fins falcate, each followed by 7-10 finlets; pectoral fins very short, no reaching past first dorsal fin; 16-21% fork length; small scales on body; corselet of larger scales developed, but indistinct.

Back metallic dark blue; lower sides and belly silvery white; first dorsal fin yellowish or bluish, second dorsal reddish brown; anal fin and finlets dusky yellow edged with black.


Size: attains 330 cm, common to 200 cm.

Habitat: oceanic, pelagic.

Depth: 0-550 m.

Pacific, in tropical and temperate seas; California to the SW Gulf of California, and the Revillagigedos islands.

The Pacific and Atlantic populations are recognized as a separate species by Collette (1999).


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos).
Depth Range Max: 550 m.
Depth Range Min: 0 m.
Diet: octopus/squid/cuttlefish; bony fishes; Pelagic crustacea.
Eastern Pacific Range: Northern limit=33; Southern limit=19; Western limit=-118; Eastern limit=-110; Latitudinal range=14; Longitudinal range=8.
Egg Type: Pelagic; Pelagic larva.
Feeding Group: Carnivore.
FishBase Habitat: Pelagic.
Global Endemism: All Pacific (West + Central + East); TEP non-endemic; Pacific only (East + Central &/or West); "Transpacific" (East + Central &/or West Pacific); All species.
Habitat: Water column.
Inshore Offshore: Offshore; Offshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 330 cm.
Regional Endemism: Island (s); Continent; Continent + Island (s); Tropical Eastern Pacific (TEP) non-endemic; Eastern Pacific non-endemic; All species.
Residency: Vagrant.
Salinity: Marine; Marine Only.
Water Column Position: Mid Water; Near Surface; Surface; Water column only;


Names
Scientific source:

Links to other sites

References
  • Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741.
  • Collette , B. B. and Nauen, C. E., 1983., Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. FAO species catalogue Vol. 2., FAO Fish. Synop. No 125, 125.
  • Collette, B.B., 1999., Mackerels, molecular, and morphology. In Proc. 5th Indo-Pac. Fish. Conf. Nouméa, 1977. Séret B. & J. Sire. Eds., Soc. Fr. Ichtyol.:149-164.
  • Collette, B.B., Reeb, C. and Block, B.A., 2001., Systematics of the tunas and mackerels (Scombridae)., Fish Physiology, 19:1-33.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versión 1.0. Projecto de la Macrofauna del Golfo .  Derechos reservados de los autores y Conservación Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen III. Vertebrados - Parte 2., FAO3:1201-1813.
  • Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398.
  • Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2.
  • Joseph , J. , Klawe , W. and Murphy, P., 1988., Tuna and Billfish - fish without a country., Inter-American Tropical Tuna Commission:69.
  • Lopez , M. I. and Bussing, W. A., 1982., Lista provisional de los peces marinos de la Costa Rica., Revista de Biologia Tropical, 30(1):5-26.
  • Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp.
  • Schaefer, K. M., 2001., Reproductive biology of tunas., Fish Physiology, 19:225-270.
  • Temminck , C. J. and Schlegel, H., 1844., Pisces. In: Fauna Japonica, sive descriptio animalium quae in itinere per Japoniam suscepto annis 1823-30 collegit, notis observationibus et adumbrationibus illustravit P. F. de Siebold., Pisces, Fauna Japonica, (Parts 5-6):73-112.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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