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> Scombriformes (Mackerels) > Icosteidae (Ragfish)
Etymology: Icosteus: Greek, eikoo = to sag, to bend something that is soft + Greek, osteon = bone.

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

seewasser bathypelagisch; tiefenbereich 0 - 1420 m (Ref. 50550), usually 18 - 732 m (Ref. 2850). Deep-water; 66°N - 32°N

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

North Pacific: Japan to southeastern Alaska and to Point Loma, southern California, USA.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 213 cm TL Männchen/unbestimmt; (Ref. 2850)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 52 - 55; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 34 - 40. Pectorals rounded, pedunculate (Ref. 6885). Generally of a chocolate color (Ref. 6885). Young more robust, with an expanded and rounded caudal fin, 5 pelvic rays, and a brown and yellow irregularly blotched with faint purple color, dusky on fins (Ref. 6885).

Adults occur near bottom; juveniles in shallow water or offshore near the surface (Ref. 50277). Feeds on jellyfish (Ref. 50277), fishes and squids (Ref. 2850), as well as octopuses (Ref. 4525).

Life cycle and mating behavior Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven

Hauptreferenz Upload your references | Referenzen | Koordinator | Partner

Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)

IUCN Rote Liste Status (Ref. 130435)

Nicht untersucht

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 2 - 14.1, mean 6.2 °C (based on 1370 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01995 (0.00906 - 0.04395), b=3.01 (2.83 - 3.19), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.5 ±0.57 se; based on food items.

Generation time: 8.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.13; Fec=293,000).

Fishing Vulnerability (Ref. 59153): High to very high vulnerability (71 of 100).

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Icosteus aenigmaticus Lockington, 1880