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Alepocephaliformes (Slickheads and tubeshoulders.) >
Platytroctidae (Tubeshoulders)
Etymology: Normichthys: Because of John Roxburgh Norman, British ichthyiologist 1898-1944 (Ref. 45335).
Eponymy: John Roxborough Norman (1898–1944) was an English ichthyologist who started his working life as a bank clerk. [...] The Yahgan, also called Yaghan or Yagán, are an indigenous people of Tierra del Fuego who, according to the author, “…practiced shellfish conservation and avoided exhausting their food supply.” (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina batypelagisk; djupintervall 0 - 2000 m. Deep-water; 30°S - 60°S
Circumglobal in the Sub-tropical Convergence region of the Southern Hemisphere, mostly between 30°S and 50°S; one record from 59°S, 60°W.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 16.4 cm SL hane/ej könsbestämd; (Ref. 5161)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 17 - 20; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 16 - 19.
Associated with the Antarctic Intermediate Water. Biology unknown (Ref. 5161). Minimum depth from Ref. 58018.
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Heemstra, P.C., 1990. Platytroctidae. p. 115. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. (Ref. 5161)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Fiskeri: saknar intresse
Verktyg
Special reports
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Estimates based on models
Preferred temperature (Ref.
123201): 5 - 11.6, mean 7.6 °C (based on 310 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.4 ±0.5 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Assuming tmax>3).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
