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Thunnus obesus (Lowe, 1839)

Bigeye tuna
إضافة ملاحظاتك Fish Watcher
Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Thunnus obesus   AquaMaps   Data sources: GBIF OBIS
ارفع صور و مقاطع فيديو
 Pictures | Stamps, Coins Misc. | صور قوقل
Image of Thunnus obesus (Bigeye tuna)
Thunnus obesus
Picture by Chow, S.

Portugal country information

Common names: Albacora, Albacora-ôlho-grande, Alvacor
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: minor commercial | Ref: FAO, 1994
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments:
National Checklist: Portugal
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/po.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Collette, B.B. and C.E. Nauen, 1983
National Database: Portuguese Freshwater Fishes

Common names from other countries

Patudo, Тунец большеглазый, Thon obèse, ... more

التصنيف / Names الأسماء الشائعة | مرادفات | Catalog of Fishes(جنس, الانواع) | ITIS | CoL | WoRMS | Cloffa

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

Environment: milieu / climate zone / depth range / distribution range البيئة

بحري; محيطية (Ref. 51243); نطاق العمق 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

التوزيع دول | مناطق الفاو | النظام البيئي | الظهور | Point map | مقدمة | Faunafri

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

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm 112.5, range 100 - 125 cm
Max length : 250 cm TL ذكر/ مختلط الجنس; (Ref. 27000); common length : 180 cm FL ذكر/ مختلط الجنس; (Ref. 168); أعلا وزن تم نشرة: 210.0 kg (Ref. 9987); العمر: 11 سنين (Ref. 30326)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع): 13 - 14; الأشعة الظهرية الناعمة (المجموع): 14-15; شوكة شرجية 0; أشعه شرجية لينه: 14; فقرات: 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).

أحياء     المصطلحات (على سبيل المثال 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).

Life cycle and mating behavior النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae

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).

المرجع الرئيسي Upload your references | مراجع | المنظم : Collette, Bruce B. | المتعاونين

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)

IUCN Red List Status (Ref. 130435)

  معرضة للخطر, انظر القائمة الحمراء للأتحاد الدولي للمحميات الطبيعية (VU) (A2bd); Date assessed: 15 January 2021

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless




استخدامات بشرية

مصائد: ذو قيمة تاجرية عالية; لعبة سمكه: نعم
FAO(مصائد: الأنتاج, ملف الأنواع; publication : search) | FIRMS (Stock assessments) | FishSource | البحر حولنا

أدوات

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مصادر علي الأنترنت

Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | البحث في مراقبي الأسماك | CISTI | Catalog of Fishes(جنس, الانواع) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(الوراثة, نيوكلوتيدة) | GloBI | GOBASE | | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | قاعدة البينات الوطنية | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | شجرة الحياة | Wikipedia(ذهب, بحث) | World Records Freshwater Fishing | سجلات علم الحيوانات

Estimates based on models

Preferred temperature (Ref. 115969): 16.8 - 28.6, mean 26.6 (based on 3638 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01318 (0.01039 - 0.01673), b=3.03 (2.99 - 3.07), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278):  4.5   ±0.0 se; based on diet studies.
المرونه (Ref. 120179):  وسيط, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 1.4-4.4 سنة (K=0.11-0.23; tm=3; tmax=11; Fec=2 million).
Prior r = 0.65, 95% CL = 0.43 - 0.98, Based on 5 stock assessments.
Fishing Vulnerability (Ref. 59153):  High vulnerability (56 of 100).
Climate Vulnerability (Ref. 125649):  Moderate to high vulnerability (47 of 100).
فئة السعر (Ref. 80766):   Very high.