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Gadus chalcogrammus Pallas, 1814

Alaska pollock
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Gadus chalcogrammus
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条鰭類 > 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 生態学

; 海; 汽水性の 底生の漂泳性; 移住性ではない; 深さの範囲 ? - 1280 m (Ref. 50550), usually 30 - 400 m (Ref. 54255).   Polar; 68°N - 34°N, 129°E - 120°W (Ref. 54255)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | 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 / サイズ / 重さ / 年齢

Maturity: Lm 36.9  range ? - ? cm
Max length : 91.0 cm TL オス/雌雄の選別がない; (Ref. 2850); 最大公表体重: 3.9 kg (Ref. 56335); 最大記録サイズ: 28 年 (Ref. 55701)

簡単な記述 形態学 | 形態計測学

背面の脊椎 (合計): 0; 背鰭 (合計): 38-48; 肛門の骨 0; 臀鰭: 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.

生物学     用語集 (例 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 成熟 | 繁殖 | 放精 | | 生産力 | 幼生

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

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

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のレッドリストの状況は (Ref. 120744)


CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 高い商業の
FAO(水産業: 代謝, 種の外形; publication : search) | FishSource | 私達の周りの海

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参考文献
水産養殖
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遺伝子の
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シガテラ(食中毒の名前)
速度
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Otoliths

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インターネットの情報源

Estimates of some properties 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).
栄養段階 (Ref. 69278):  3.6   ±0.1 se; Based on diet studies.
回復力 (Ref. 69278):  低い, 4.5年~14年の倍増期間の最小個体群 (Musick et al. 2000 (Ref. 36717); tmax = 28).
Prior r = 0.32, 95% CL = 0.21 - 0.50, Based on 8 stock assessments.
弱み (Ref. 59153):  Moderate vulnerability (37 of 100) .
価格帯 (Ref. 80766):   Low.