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Scombriformes (Mackerels) >
Gempylidae (Snake mackerels)
Etymology: Diplospinus: Greek, diploos = twice + Latin, spina = spine, thorn (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bentopelagisk; djupintervall 50 - 1000 m (Ref. 9784). Deep-water; 42°N - 38°S, 180°W - 180°E
Atlantic, Indian and Pacific: in central water masses. Rather rare, but relatively abundant in the northwest and southeast Atlantic and southeast Pacific Ref. 6181).
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm ?, range 16 - ? cm
Max length : 33.0 cm SL hane/ej könsbestämd; (Ref. 9784); common length : 20.0 cm SL hane/ej könsbestämd; (Ref. 6181)
Taggstrålar i ryggfenan (totalt) : 30 - 36; Mjukstrålar i ryggfenan (totalt) : 35 - 44; Taggstrålar i analfenan: 2; Mjukstrålar i analfenan: 28 - 35; Ryggkotor: 57 - 64. Body is extremely elongate and compressed. Lower jaw extends anterior to upper jaw with a small conical dermal process. Upper jaw with 3 immovable and 3 or 4 movable fang-like teeth anteriorly. Lateral line situated closer to the ventral profile than the dorsal profile posteriorly. Color is silvery with narrow dark dotted lines along the body; the gill membranes are jet-black.
Body shape (shape guide): elongated; Cross section: compressed.
Oceanic, migrating upward at night to 100 to 200 m (Ref. 6181). Probably forming schools during daytime (Ref. 6181). Feed on crustaceans and small fish (Ref. 6181). Females mature at about 16 cm (Ref. 36731). Eggs and larvae are pelagic (Ref. 6766).
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 på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: husbehovsfiske
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Uppskattningar baserade på modeller
Önskad temperatur (Ref.
123201): 8.7 - 19.2, mean 13.1 °C (based on 808 cells).
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00169 - 0.00815), b=3.11 (2.92 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.5 ±0.52 se; based on food items.
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Fec=1,200).
Sårbarhet i fisket (Ref.
59153): Low to moderate vulnerability (30 of 100).
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