Gadus chalcogrammus, Alaska pollock : fisheries

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Gadus chalcogrammus Pallas, 1814

Alaska pollock
إضافة ملاحظاتك Fish Watcher
Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Gadus chalcogrammus   AquaMaps   Data sources: GBIF OBIS
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Pictures | Videos | صور قوقل
Image of Gadus chalcogrammus (Alaska pollock)
Gadus chalcogrammus
Picture by Archipelago Marine Research Ltd.

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

> Gadiformes (Cods) > Gadidae (Cods and haddocks)
Etymology: Gadus: Latin, gadus = a fish, cod? (Ref. 45335);  chalcogrammus: Name from the Greek 'chalcos' meaning brass and 'gramma' meaning mark (Ref. 6885).
More on author: Pallas.

Issue
This species is placed in the genus Gadus in Eschmeyer (CofF ver. Jan. 2012: Ref. 89336). More studies are needed for a complete revision of all genera of Gadidae.

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

بحري; مياه مخلوطة قاعية التغذية و المعيشة; غير مهاجرة; نطاق العمق ? - 1280 m (Ref. 50550), usually 30 - 400 m (Ref. 54255). Polar; 68°N - 34°N, 129°E - 120°W (Ref. 54255)

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

North Pacific: from Kivalina, Alaska, to the southern Sea of Japan and to Carmel, California, USA. The occurrence off the northern part of Baja California (Mexico), as reported from Quast and Hall, (1972) (Ref. 6876) is apparently erroneous.

Length at first maturity / الحجم / وزن / العمر

Maturity: Lm 36.9  range ? - ? cm
Max length : 91.0 cm TL ذكر/ مختلط الجنس; (Ref. 2850); أعلا وزن تم نشرة: 3.9 kg (Ref. 56335); العمر: 28 سنين (Ref. 55701)

وصف مختصر الوصف الخارجي | قياسات المظهر الخارجي

الأشواك الظهرية (المجموع): 0; الأشعة الظهرية الناعمة (المجموع): 38-48; شوكة شرجية 0; أشعه شرجية لينه: 33 - 42. The dorsal fins are widely separated. The pelvic fins have a slightly elongated filament. The lateral line is continuous to about the back end of the first dorsal-fin base; it is interrupted at the read of the body. On the head are lateral line pores. Body color is olive green to brown on the back and becomes silvery on the sides and pale ventrally, often with mottled patterns or blotches.

أحياء     المصطلحات (على سبيل المثال epibenthic)

The adults usually live near to the sea floor, but sometimes they also appear near the surface (Ref. 1371). They perform diurnal vertical migrations (Ref. 1371). They mainly feed on krill (Ref. 39882) but they also eat fishes and crustaceans (Ref. 6885). The adults which are spawning are often solely captured for their roe (may have been the case in the first years of the fishery in the U.S., but hasn't been true for some time. In 1994, the North Pacific Fishery Management Council/NOAA enacted an amendment to the Bering Sea and Gulf of Alaska Fishery Management Plans effectively banning the practice of stripping roe and discarding the carcasses, R. Rogness, pers.comm. April 2022). The meat is used to produce surimi (this is an imitation of shellfish meat) (Ref. 28499). They are traded as fresh fish, boneless flesh, in frozen blocks or as surimi. The fish is cooked in the microwave, steamed or fried in butter (Ref. 9988).

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

Oviparous, sexes are separate (Ref. 205). Congregate in dense schools to spawn, usually at 50 to 250 m depth.

المرجع الرئيسي Upload your references | مراجع | المنظم | المتعاونين

Cohen, D.M., T. Inada, T. Iwamoto and N. Scialabba, 1990. FAO species catalogue. Vol. 10. Gadiform fishes of the world (Order Gadiformes). An annotated and illustrated catalogue of cods, hakes, grenadiers and other gadiform fishes known to date. FAO Fish. Synop. 125(10). Rome: FAO. 442 p. (Ref. 1371)

IUCN Red List Status (Ref. 130435)


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر للأنسان

  Harmless





استخدامات بشرية

مصائد: ذو قيمة تاجرية عالية

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مصادر علي الأنترنت

Estimates based on models

Preferred temperature (Ref. 123201): 0.4 - 5.6, mean 1.6 °C (based on 444 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00631 (0.00550 - 0.00723), b=3.03 (2.99 - 3.07), in cm total length, based on LWR estimates for this species (Ref. 93245).
مستوى غذائي (Ref. 69278):  3.6   ±0.1 se; based on diet studies.
Generation time: 6.5 (3.6 - 7.8) years. Estimated as median ln(3)/K based on 25 growth studies.
المرونه (Ref. 120179):  منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Musick et al. 2000 (Ref. 36717); tmax = 28).
Prior r = 0.32, 95% CL = 0.21 - 0.50, Based on 8 stock assessments.
Fishing Vulnerability (Ref. 59153):  High vulnerability (59 of 100).
Climate Vulnerability (Ref. 125649):  High vulnerability (55 of 100).
فئة السعر (Ref. 80766):   Low.
Nutrients (Ref. 124155):  Calcium = 12 [8, 19] mg/100g; Iron = 0.185 [0.122, 0.296] mg/100g; Protein = 16.5 [15.1, 17.9] %; Omega3 = 0.337 [0.159, 0.741] g/100g; Selenium = 14.5 [5.7, 33.5] μg/100g; VitaminA = 11.2 [2.0, 57.3] μg/100g; Zinc = 0.445 [0.340, 0.563] mg/100g (wet weight); based on nutrient studies.