Argyropelecus hemigymnus, Half-naked hatchetfish

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Argyropelecus hemigymnus Cocco 1829

Half-naked hatchetfish
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
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.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

> 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 Ecologie

; marien bathypelagisch; diepteverspreiding 0 - 2400 m (Ref. 74511), usually 100 - 700 m (Ref. 28981).   Deep-water; 60°N - 56°S

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | 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 / Gewicht / Leeftijd

Maturity: Lm ?, range 3 - ? cm
Max length : 5.1 cm TL mannelijk/geslacht niet bekend; (Ref. 96016); Maximaal gepubliceerd gewicht: 1.40 g (Ref. 96016); Maximaal vermelde leeftijd: 1.00 jaren (Ref. 5168)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 0; Dorsale zachte stralen (totaal): 8-9; Anale stekels 0; Anale zachte stralen: 11 - 12; Wervels: 36 - 39. Body bright silvery in color; body and trunk with dusky coloration at night (Ref. 4054). Branchiostegal rays: 10 (Ref. 35838).

Biologie     Verklarende woordenlijst (b.v. 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 Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

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

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

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)

Status op de Rode Lijst van het IUCN (Ref. 123251)

  Niet bedreigd (LC) ; Date assessed: 04 February 2009

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Preferred temperature (Ref. 115969): 5.5 - 21.3, mean 11.3 °C (based on 2694 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00635 - 0.03140), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.14 se; based on food items.
Weerstandsvermogen (Ref. 120179):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (tm=1; tmax=1).
Kwetsbaarheid (Ref. 59153):  Low vulnerability (13 of 100) .