Thunnus obesus, Bigeye tuna : fisheries, gamefish

Thunnus obesus (Lowe, 1839)

Bigeye tuna
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Thunnus obesus   AquaMaps   Data sources: GBIF OBIS
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Thunnus obesus
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Classification / Noms Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Scombriformes (Mackerels) > Scombridae (Mackerels, tunas, bonitos) > Scombrinae
Etymology: Thunnus: Greek, thynnos = tunna (Ref. 45335).
More on author: Lowe.

Environnement : milieu / zone climatique / profondeur / gamme de distribution Écologie

marin pelagic-oceanic; océanodrome (Ref. 71039); profondeur 0 - 1500 m (Ref. 117020), usually 0 - 500 m (Ref. 117020). Subtropical; 13°C - 29°C (Ref. 168); 52°N - 48°S, 180°W - 180°E

Distribution Territoires | Zones FAO | Écosystèmes | Occurrences | Carte par point | Introductions | Faunafri

Atlantic, Indian and Pacific: in tropical and subtropical waters. Absent in the Mediterranean. Highly migratory species.

Longueur à la première maturité / Taille / Poids / Âge

Maturité: Lm 112.5, range 100 - 125 cm
Max length : 250 cm TL mâle / non sexé; (Ref. 27000); common length : 180 cm FL mâle / non sexé; (Ref. 168); poids max. publié: 210.0 kg (Ref. 9987); âge max. reporté: 17 années (Ref. 137697)

Description synthétique Clés d'identification | Morphologie | Morphométrie

Épines dorsales (Total) : 13 - 14; Rayons mous dorsaux (Total) : 14 - 15; Épines anales: 0; Rayons mous anaux: 14; Vertèbres: 39. This large species is distinguished by the following characters: robust, fusiform body, slightly compressed from side to side; total gill rakers on first gill arch 23-31; dorsal fins separated only by a narrow interspace, the second followed by 8-10 finlets; anal fin followed by 7-10 finlets; pectoral fins moderately long (22 to 31% of fork length) in large specimens (over 110 cm FL), but very long (as long as in Thunnus alalunga) in smaller specimens; 2 flaps (interpelvic process) between pelvic fins; very small scales on body; corselet of larger and thicker scales developed, but not very distinct; caudal peduncle very slender, with a strong lateral keel between 2 smaller keels; ventral surface of liver striated; swimbladder present. Colour of back metallic dark blue, lower sides and belly whitish; a lateral iridescent blue band runs along sides in live specimens; first dorsal fin deep yellow, second dorsal and anal fins light yellow, finlets bright yellow edged with black (Ref. 9684).
Body shape (shape guide): fusiform / normal; Cross section: oval.

Biologie     Glossaire (ex. epibenthic)

Occur in areas where water temperatures range from 13°-29°C, but the optimum is between 17° and 22°C. Variation in occurrence is closely related to seasonal and climatic changes in surface temperature and thermocline. Juveniles and small adults school at the surface in mono-species groups or mixed with other tunas, may be associated with floating objects. Adults stay in deeper waters (Ref. 5377). Eggs and larvae are pelagic (Ref. 6390). Feed on a wide variety of fishes, cephalopods and crustaceans during the day and at night (Ref. 9340). Meat is highly prized and processed into sashimi in Japan. Marketed mainly canned or frozen (Ref. 9684), but also sold fresh (Ref. 9340).

Cycle de vie et comportement reproducteur Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Are multiple spawners that may spawn every 1 or 2 days over several months (Ref. 30330). They spawn over periods of the full moon (Ref. 6390). Spawn throughout the year in tropical waters (Ref. 6390).

Référence principale Téléchargez vos références | Références | Coordinateur : Collette, Bruce B. | Collaborateurs

Collette, B.B. and C.E. Nauen, 1983. FAO Species Catalogue. Vol. 2. Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. Rome: FAO. FAO Fish. Synop. 125(2):137 p. (Ref. 168)

Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))

  Vulnérable (VU) (A2bd); Date assessed: 15 January 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: hautement commercial; pêche sportive: oui
FAO - pêcheries: débarquements, Résumé espèce; Publication: search | FIRMS - Stock assessments | FishSource | Sea Around Us

Plus d'informations

Cycle de vie
Reproduction
Maturité
Maturité/épines rel.
Fécondité
Frai
Agrégats de frai
Œufs
Développement de l'œuf
Larves
Dynamique des populations larvaires
Anatomie
Surface branchiale
Cerveau
Otolithe
Physiologie
Composition corporelle
Nutriments
Consommation d'oxygène
Type de natation
Vitesse de nage
Pigments visuels
Son de poisson
Maladies et parasites
Toxicité (CL50)
Génétique
génôme
Génétique
Hétérozygotie
Héritabilité
Diversité génétique
Liées à l'homme
Systèmes d'aquaculture
Profils d'aquaculture
Souches
Cas de ciguatera
Timbres, pièces de monnaie, divers
Sensibilisation
Collaborateurs
Références
Références

Outils

Articles particuliers

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Sources Internet

Estimations basées sur des modèles

Température préférée (Réf. 123201): 16.8 - 28.6, mean 26.6 °C (based on 3638 cells).
Indice de diversité phylogénétique (Réf. 82804):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.01043 - 0.01666), b=3.03 (2.99 - 3.07), in cm total length, based on LWR estimates for this species (Ref. 93245).
Niveau trophique (Réf. 69278):  4.5   ±0.0 se; based on diet studies.
Generation time: 6.6 (4.4 - 10.4) years. Estimated as median ln(3)/K based on 12 growth studies.
Résilience (Réf. 120179):  Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (K=0.11-0.23; tm=3; tmax=11; Fec=2 million).
Prior r = 0.52, 95% CL = 0.34 - 0.77, Based on 10 full stock assessments.
Vulnérabilité de la pêche (Ref. 59153):  High vulnerability (56 of 100). 🛈
Vulnérabilité climatique (Ref. 125649):  Moderate to high vulnerability (47 of 100). 🛈
Catégorie de prix (Ref. 80766):   Very high.
Nutriments (Ref. 124155):  Calcium = 22.1 [12.0, 42.2] mg/100g; Iron = 2.65 [1.06, 6.93] mg/100g; Protein = 24 [23, 25] %; Omega3 = 0.453 [0.273, 0.754] g/100g; Selenium = 54.7 [17.4, 171.5] μg/100g; VitaminA = 19.6 [2.7, 180.1] μg/100g; Zinc = 0.278 [0.153, 0.561] mg/100g (wet weight);