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Diaphus theta Eigenmann & Eigenmann, 1890

California headlightfish
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Diaphus theta   AquaMaps   Data sources: GBIF OBIS
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Image of Diaphus theta (California headlightfish)
Diaphus theta
Picture by Orlov, A.

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

> Myctophiformes (Lanternfishes) > Myctophidae (Lanternfishes) > Diaphinae
Etymology: Diaphus: Greek, dis, dia = through + Greek, physa, phyo = to beget, to have as offspring (Ref. 45335);  theta: Named after the Greek letter and refers to the body photophores which are divided horizontally by a fine line of black pigment (Ref. 6885).
More on authors: Eigenmann & Eigenmann.

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

marina batypelagisk; djupintervall 10 - 3400 m (Ref. 50550), usually 10 - 400 m (Ref. 28981). Deep-water; 66°N - 20°S

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Eastern Pacific: common in California Current region to 20°S (Ref. 31442), including Hawaii (Ref. 4925). Northwest Pacific: throughout subarctic-transitional waters to northern Japan (Ref. 31442).

Length at first maturity / Size / Vikt / Age

Maturity: Lm ?, range 6 - ? cm
Max length : 11.4 cm TL hane/ej könsbestämd; (Ref. 4925)

Short description Bestämningsnycklar | Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 12 - 14; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 12 - 14; Ryggkotor: 34 - 36. Adipose small, narrow based, slender (Ref. 6885). Brown to black on dorsal surface, lighter ventrally; fins pale (Ref. 6885). Branchiostegal rays: 9 (Ref. 31442).

Biologi     Ordlista (t.ex. epibenthic)

Epipelagic to mesopelagic (Ref. 31442). Feed at night or in the morning (Ref. 9199), on euphausiids, copepods, and amphipods (Ref. 11712). Oviparous, with planktonic eggs and larvae (Ref. 31442). Lipid content is 15.8 % in fresh body weight while wax ester is present in trace amounts (Ref. 9197). Minimum depth reported from Ref. 28981.

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

Oviparous (Ref. 31442).

Main reference Upload your references | referenser | Koordinator : Paxton, John | Medarbetare

Clemens, W.A. and G.V. Wilby, 1961. Fishes of the Pacific coast of Canada. 2nd ed. Fish. Res. Bd. Canada Bull. (68):443 p. (Ref. 4925)

IUCN Red List Status (Ref. 130435)

  Least Concern (LC) ; Date assessed: 26 June 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

Ytterligare information

Trophic ecology
Födoslag
Diet compositions
Food consumptions
Food rations
Predatorer
Ecology
Ekologi
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Reproduktion
Maturities
Fecundities
Spawnings
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Egg(s)
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Larver
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Fiskljud
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synonymer
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referenser

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Internet-källor

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

Estimates based on models

Preferred temperature (Ref. 123201): 4.8 - 15.3, mean 7.9 °C (based on 504 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00436 - 0.02294), b=3.04 (2.86 - 3.22), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  3.2   ±0.1 se; based on diet studies.
Generation time: 2.2 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resiliens (Ref. 120179):  Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (25 of 100).