Teleostei (teleosts) >
Gadiformes (Cods) >
Macrouridae (Grenadiers or rattails)
Etymology: Nezumia: A Japanese word that means "mouse".
More on author: Iwamoto.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; non-migratory; depth range 329 - 1261 m (Ref. 1371), usually 400 - 500 m (Ref. 1371). Deep-water; 25°N - 18°S, 22°W - 13°E (Ref. 1371)
Southeast Atlantic: southernly into the Gulf of Guinea to Angola.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 25.0 cm TL male/unsexed; (Ref. 1371)
Short description
Identification keys | Morphology | Morphometrics
Dorsal spines (total): 2; Anal spines: 0. Ventral leading edge of snout and narrow ventromedian strip on underside naked, head otherwise completely scaled. Scales deciduous, with small, short, conical spinules in 6 to 9 parallel rows. Overall color is brownish to bluish; trunk bluish to blackish; fins blackish; mouth dusky; gill cavities blackish.
Apparently found deeper in the northern part of its range. Copepods (80%) and polychaetes (62%) have the highest proportions in specimens examined from the slope off northwestern Africa. Other crustaceans and a few fish formed the remainder of the diet. This species like the majority of macrourines, depends on a mixed diet of benthic and pelagic organisms (Ref. 6219).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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: minor commercial
Tools
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Internet sources
Estimates based on models
Preferred temperature (Ref.
123201): 7.1 - 9.3, mean 7.4 °C (based on 12 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00214 (0.00109 - 0.00421), b=3.20 (3.03 - 3.37), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.5 ±0.45 se; based on food items.
Resilience (Ref.
120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (15 of 100).
