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> Argentiniformes (Marine smelts) > Microstomatidae (Pencil smelts)
Etymology: obscura: From the dark color of the body and scale pockets.
Eponymy: Fridtjof Nansen (1861–1930) was a Norwegian explorer, scientist, diplomat and later recipient of the Nobel Peace Prize. [...] (Ref. 128868), visit book page.

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

seewasser benthopelagisch; tiefenbereich 0 - 490 m (Ref. 41397). Deep-water

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Western Indian Ocean: Yemen and Somalia, Arabian Peninsula.

Size / Gewicht / Alter

Maturity: L_m ? range ? - ? cm
Max length : 15.2 cm SL Männchen/unbestimmt; (Ref. 41397)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenweichstrahlen (insgesamt) : 9 - 10; Afterflossenweichstrahlen: 9 - 10; Wirbelzahl: 42 - 44. Branchiostegal rays 4. Caudal peduncle long and narrow; 2.2-2.6 times the depth. Anterodorsal distance is 48-52% SL. Intensively black pigmented scale pockets; adipose fin pigmented only along its base (Ref. 41397).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Kobyliansky, S.G., 1992. Two new species from the genus Nansenia (Microstomatidae, Salmoniformes) from the western Indian Ocean. J. Ichthyol. 32(7):30-36. (Ref. 41397)

IUCN Rote Liste Status (Ref. 130435: Version 2024-1)

Nicht untersucht

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless

Nutzung durch Menschen

Fischereien:

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.4 se; based on size and trophs of closest relatives

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Preiskategorie (Ref. 80766): Unknown.

Nansenia obscura Kobyliansky & Usachev, 1992