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Argyropelecus hemigymnus Cocco, 1829

Half-naked hatchetfish
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Argyropelecus hemigymnus   AquaMaps   Data sources: GBIF OBIS
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Image of Argyropelecus hemigymnus (Half-naked hatchetfish)
Argyropelecus hemigymnus
Picture by Fischer, L.G.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Stomiiformes (Lightfishes and dragonfishes) > Sternoptychidae (Marine hatchetfishes) > Sternoptychinae
Etymology: Argyropelecus: Greek, argyros = silvered, silver + Greek, pelekys = axe (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; bathypelagic; depth range 0 - 2400 m (Ref. 74511), usually 100 - 700 m (Ref. 28981). Deep-water; 60°N - 56°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Atlantic: north of British Isles to South Africa, including western Mediterranean. Western Atlantic: New Jersey, USA to Argentina (Ref. 26340). Northwest Atlantic: Canada (Ref. 5951). Eastern Pacific: throughout the California Current area, seaward of the continental shelf (Ref. 35838). Known from tropical and subtropical waters of all oceans (Ref. 47377). South China Sea (Ref.74511).

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 3 - ? cm
Max length : 5.1 cm TL male/unsexed; (Ref. 96016); max. published weight: 1.42 g (Ref. 128245); max. reported age: 1.00 years (Ref. 5168)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 8 - 9; Anal spines: 0; Anal soft rays: 11 - 12; Vertebrae: 36 - 39. Body bright silvery in color; body and trunk with dusky coloration at night (Ref. 4054). Branchiostegal rays: 10 (Ref. 35838).

Biology     Glossary (e.g. epibenthic)

Oceanic (Ref. 4739) and mesopelagic, mainly at 250-650 m (Ref. 4054). Depth range from 100-700 m (Ref. 4462) and from 460-1082 m in the eastern Ionian Sea (Ref. 56504). Adults make marked vertical migrations (Ref. 4739). Found singly or in small groups (Ref. 4739). An opportunistic feeder at dusk on calanoid copepods, small fishes, etc (Ref. 4739). Sexual dimorphism with regard to body size (Ref. 5168), the males being slightly smaller than the females (Ref. 8966). Oviparous, with planktonic eggs and larvae (Ref. 35838). Occurs between 200 and 700 m depth during the day, concentrated between 350 and 550 m, and between 100 and 650 m at night, preferring a depth between 150 and 380 m Ref. 47377). Also Ref. 58302.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Spawns more than once per season with egg batches about 50-500 egg/ovary pair, the number increasing with increased animal size (Ref. 4739).

Main reference Upload your references | References | Coordinator | Collaborators

Gon, O., 1990. Sternoptychidae. p. 123-126. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. (Ref. 5168)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 04 February 2009

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: of no interest
FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet compositions
Food consumptions
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Ecology
Ecology
Population dynamics
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Max. ages / sizes
Length-weight rel.
Length-length rel.
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Fecundities
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Visual pigment(s)
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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Preferred temperature (Ref. 123201): 5.5 - 21.3, mean 11.3 °C (based on 2694 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01698 (0.00984 - 0.02932), b=3.11 (2.96 - 3.26), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.14 se; based on food items.
Resilience (Ref. 120179):  High, minimum population doubling time less than 15 months (tm=1; tmax=1).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).
Nutrients (Ref. 124155):  Calcium = 53 [14, 266] mg/100g; Iron = 0.636 [0.179, 2.130] mg/100g; Protein = 2.42 [0.00, 6.40] %; Omega3 = 0.273 [0.071, 1.024] g/100g; Selenium = 9.22 [2.53, 44.10] μg/100g; VitaminA = 33.7 [3.6, 314.7] μg/100g; Zinc = 0.916 [0.368, 2.357] mg/100g (wet weight);