Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Biển gần đáy; Ở đại duơng, biển (Ref. 51243); Mức độ sâu 55 - 914 m (Ref. 58452). Temperate; 55°N - 24°N, 80°W - 42°W (Ref. 54581)
Northwest Atlantic: coast of Canada and USA from Bell Isle Channel to the Bahamas; most common from southern Newfoundland to South Carolina.
Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm 23.2  range ? - ? cm
Max length : 76.0 cm TL con đực/không giới tính; (Ref. 1371); common length : 37.0 cm TL con đực/không giới tính; (Ref. 1371); common length :65 cm TL (female); Khối lượng cực đại được công bố: 2.3 kg (Ref. 1371); Tuổi cực đại được báo cáo: 12 các năm (Ref. 1371)
Các tia vây lưng cứng (tổng cộng): 1; Các vây lưng mềm (tổng cộng): 47-54; Tia cứng vây hậu môn 0; Tia mềm vây hậu môn: 37 - 41. Head large, about 30% of SL . Pectoral fins long, reaching origin of anal fin. Overall color is silvery, somewhat brownish on back, whitish on belly.
Abundant on sandy grounds and strays into shallower waters. A voracious predator with cannibalistic habits. Individuals over 40 cm TL prey on fishes such as gadoids and herring, while smaller ones feed on crustaceans, i.e. euphausiids and pandalids; food also includes gaspereau, myctophids, smelt, silversides, mackerel, sand lance, butterfish, snakeblennies, longhorn sculpins and squids (Ref. 5951). The smallest specimen feeds mostly on crustaceans (Ref. 58452). Exhibits seasonal onshore-offshore migration (Ref. 9988). Spawning takes place from June-July in the mid-Atlantic region; July-August in the Gulf of Maine and to the north of Georges Bank, and August-September on the Scotian Shelf (Ref. 58452). Marketed fresh, smoked and frozen; fresh fish are exported to European markets; eaten fried, broiled, microwaved and baked (Ref. 9988).
Spawning appears to be strongly influenced by water temperature, and annual variations occur both in the peak and the range of the spawning period, which may influence considerably the growth of juveniles.
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. 123251)
CITES (Ref. 123416)
Threat to humans
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Estimates based on models
Preferred temperature (Ref. 115969
): 0.9 - 7.8, mean 4.9 °C (based on 155 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00354 - 0.00815), b=3.13 (3.00 - 3.26), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Mức dinh dưỡng (Ref. 69278
): 4.5 ±0.4 se; based on diet studies.
Generation time: 3.4 (2.7 - 4.3) years. Estimated as median ln(3)/K based on 10 growth studies.
Thích nghi nhanh (Ref. 120179
): Trung bình, thời gian nhân đôi của chủng quần tối thiểu là 1.4 - 4.4 năm (K=0.18-0.4;tm=2-3; tmax=12).
Prior r = 0.37, 95% CL = 0.25 - 0.56, Based on 2 stock assessments.
Vulnerability (Ref. 59153
): Moderate to high vulnerability (54 of 100) .