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> Scombriformes (Mackerels) > Gempylidae (Snake mackerels)
Etymology: Tongaichthys: From the Tonga island in the Pacific ocean + Greek, ichthys = fish.

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

marien bathypelagisch; diepte 288 - 312 m (Ref. 6181). Deep-water; 12°S - 27°S, 144°E - 174°W (Ref. 6181)

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Pacific Ocean: Several specimens (38 individuals) were reported from the Tonga Ridge; around Fiji; 1 specimen from off Flinders Reef, Queensland (17°33'S, 149°46'E, CSIRO no. H1185-01).

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 30.0 cm SL mannelijk / geslacht onbekend; (Ref. 9784)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 16 - 17; Dorsale zachte stralen (totaal) : 14 - 17; Anale stekels: 1; Anale zachte stralen: 14 - 16; Wervels: 33. Head relatively large. Scales on cheeks enlarged, elongate and slightly overlapping. Color is dark brown above, slightly paler below.

Probably mesopelagic or mesobenthopelagic (Ref. 6181).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

Hoofdreferentie Upload your references | Referenties | Coördinator : Parin, Nikolay V. | Medewerkers

Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p. (Ref. 6181)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Niet geëvalueerd

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 4.6 - 9.4, mean 6.1 °C (based on 78 cells).

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01023 (0.00426 - 0.02456), b=3.00 (2.80 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.9 ±0.6 se; based on size and trophs of closest relatives

Weerstandsvermogen (Ref. 120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Assuming tmax>3).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (27 of 100).

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Tongaichthys robustus Nakamura & Fujii, 1983