Teleostei (teleosts) >
Gadiformes (Cods) >
Macruronidae (Blue grenadiers)
Etymology: Macruronus: Greek, makros = great + Greek, onos = hake.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; brackish; benthopelagic; oceanodromous; depth range 0 - 1000 m (Ref. 26566), usually 200 - 700 m (Ref. 9563). Subtropical; 15°S - 55°S, 111°E - 173°W (Ref. 58452)
Southwest Pacific: New Zealand and southern Australia.
Length at first maturity / Size / Weight / Age
Maturity: Lm 67.5, range 65 - 70 cm
Max length : 120 cm TL male/unsexed; (Ref. 1371); 130.0 cm TL (female); common length : 80.0 cm TL male/unsexed; (Ref. 1371); max. published weight: 1.5 kg (Ref. 1371); max. published weight: 1.5 kg; max. reported age: 25 years (Ref. 6390)
Dorsal spines (total): 12 - 13; Dorsal soft rays (total): 96 - 106; Anal spines: 0; Anal soft rays: 89 - 93; Vertebrae: 78 - 81. Dorsal surface silvery, with a purple or blue-green tinge; plank and belly silvery; fins darker. Body very elongate and compressed with a tapering tail, dorsal and anal fins confluent with the caudal fin (Ref. 33856).
Appear to live usually on or near the bottom, but may occasionally move up into mid-waters. Large adult fish generally occur deeper than 400 m, while juveniles may be found in shallower water (Ref. 9072), more commonly found in large estuaries and bays, and may even enter freshwaters (Ref. 1371). Juvenile specimens and especially adults belonging to the American subspecies, have been caught from the coastal zone to 110 m (Ref. 58452). Form schools. Feed primarily on lantern fishes. In New Zealand, it feeds in midwater on small fish, crustaceans and squid. Oviparous, spawn 1 million eggs on the average which are released all at one time (Ref. 6390). Utilized fresh and frozen; can be steamed, fried, cooked in microwave and baked (Ref. 9988).
Female blue grenadier produce about 1 million eggs on average, which are all released at once (Ref. 6390).
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: Version 2024-1)
Threat to humans
Harmless
Human uses
Fisheries: highly commercial
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Estimates based on models
Preferred temperature (Ref.
123201): 5.8 - 12.5, mean 8 °C (based on 300 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00221 - 0.00684), b=2.97 (2.80 - 3.14), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trophic level (Ref.
69278): 4.5 ±0.2 se; based on diet studies.
Generation time: 6.1 (5.2 - 8.9) years. Estimated as median ln(3)/K based on 18
growth studies.
Resilience (Ref.
120179): Low, minimum population doubling time 4.5 - 14 years (K=0.12-0.2; tm=3-7; tmax=25; Fec = 1,000,000).
Prior r = 0.29, 95% CL = 0.19 - 0.44, Based on 3 full stock assessments.
Fishing Vulnerability (Ref.
59153): High to very high vulnerability (66 of 100).
Climate Vulnerability (Ref.
125649): High vulnerability (61 of 100).
Nutrients (Ref.
124155): Calcium = 26.4 [12.3, 56.9] mg/100g; Iron = 0.629 [0.299, 1.299] mg/100g; Protein = 17.7 [15.5, 19.8] %; Omega3 = 0.224 [0.105, 0.456] g/100g; Selenium = 62.1 [26.1, 122.9] μg/100g; VitaminA = 17.2 [5.4, 54.1] μg/100g; Zinc = 0.541 [0.348, 0.866] mg/100g (wet weight); based on
nutrient studies.
