Gadus chalcogrammus, Alaska pollock : fisheries
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Gadus chalcogrammus Pallas, 1814

Alaska pollock
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Gadus chalcogrammus   AquaMaps   Data sources: GBIF OBIS
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Gadus chalcogrammus
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Classification / Names Tên thường gặp | Các synonym ( Các tên trùng) | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Lớp phụ (Subclass) cá vây tia > 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 Sinh thái học

; Biển; Thuộc về nước lợ Sống nổi và đáy; không di cư; Mức độ sâu ? - 1280 m (Ref. 50550), usually 30 - 400 m (Ref. 54255).   Polar; 68°N - 34°N, 129°E - 120°W (Ref. 54255)

Sự phân bố Các nước | Các khu vực của FAO | Các hệ sinh thái | Những lần xuất hiện | Point map | Những chỉ dẫn | 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 / Bộ gần gũi / Khối lượng (Trọng lượng) / Age

Maturity: Lm 36.9  range ? - ? cm
Max length : 91.0 cm TL con đực/không giới tính; (Ref. 2850); Khối lượng cực đại được công bố: 3.9 kg (Ref. 56335); Tuổi cực đại được báo cáo: 28 các năm (Ref. 55701)

Short description Hình thái học | Sinh trắc học

Các tia vây lưng cứng (tổng cộng): 0; Các vây lưng mềm (tổng cộng): 38-48; Tia cứng vây hậu môn 0; Tia mềm vây hậu môn: 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.

Sinh học     Tự điển (thí dụ 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. 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 Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Các trứng | Sự sinh sản | Ấu trùng

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

Main reference Upload your references | Các tài liệu tham khảo | Người điều phối | Người cộng tác

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. 120744)


CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Các nghề cá: tính thương mại cao
FAO(Các nghề cá: Sản xuất, species profile; publication : search) | FishSource | Biển chung quanh ta

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Estimates based on models

Preferred temperature (Ref. 115969): 0.4 - 5.6, mean 1.6 (based on 444 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00572 - 0.00763), b=3.02 (2.98 - 3.06), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Mức dinh dưỡng (Ref. 69278):  3.6   ±0.1 se; Based on diet studies.
Generation time: 3.8 (3.3 - 9.2) years. Estimated as median LN(3)/K based on 19 growth studies.
Thích nghi nhanh (Ref. 120179):  thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Musick et al. 2000 (Ref. 36717); tmax = 28).
Prior r = 0.32, 95% CL = 0.21 - 0.50, Based on 8 stock assessments.
Vulnerability (Ref. 59153):  Moderate vulnerability (37 of 100) .
Price category (Ref. 80766):   Low.