Taxonomic Remarks
The genus Pseudotrematomus is a synonym of Trematomus, which is confirmed by a molecular study to be published (J.-C. Hureau, pers. comm. 08 Jun. 2010).
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
seewasser demersal; tiefenbereich 70 - 650 m (Ref. 26875). Polar; 60°S - 78°S
Southern Ocean: continental shelf of Antarctica and nearby islands, including the South Orkney.
Länge bei der ersten Reifung / Größe / Gewicht / Alter
Geschlechtsreife: Lm 22.0, range 19 - 26 cm
Max length : 34.5 cm TL Männchen/unbestimmt; (Ref. 87549)
Rückenflossenstacheln (insgesamt) : 6 - 7; Rückenflossenweichstrahlen (insgesamt) : 36 - 38; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 34 - 36; Wirbelzahl: 54 - 57. Second dorsal-fin rays 0-3 more than anal-fin rays. Preopercular-mandibular canal with 10 pores; infraorbital canal with 6-8 pores; supra-orbital canal with 4 pores; coronal commissure with a single median pore; temporal canal with 5-6 pores; supratemporal canal complete wit 3 pores. Body and head almost entirely scaled, including snout, preorbitals, posterior part of maxilla, lower jaw, isthmus, branchiostegal membranes and proximal parts of branchiostegal rays.
Color: In alcohol, ground color buff, with a chequered pattern formed by staggered dark blotches along the dorsal, lateral and ventral parts of the body; ventral dark blotches may appear as short wavy horizontal dark marks. Snout, occipital region and sometimes interorbital area are dark.
Body shape (shape guide): fusiform / normal.
Most common in shallower waters of the continental shelf, especially on banks less than 250 m deep in areas where local upwellings increase food supply (Ref. 6390). Juveniles are found near the surface, often in association with Antarctic krill (Euphausia superba) swarms. Feed on salps, nudibranchs, amphipods, copepods, polychaetes, krill, crustaceans, chaetognaths, and fish (Ref. 6390).
Mature females may spawn for the first time from around 7-9 years of age (Ref. 71843).
Dewitt, H.H., P.C. Heemstra and O. Gon, 1990. Nototheniidae. p. 279-331. In O. Gon and P.C. Heemstra (eds.) Fishes of the Southern Ocean. J.L.B. Smith Institute of Ichthyology, Grahamstown, South Africa. (Ref. 5179)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Fischereien: kommerziell
Tools
Zusatzinformationen
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Internet Quellen
Schätzungen auf der Grundlage von Modellen
Bevorzugte Temperatur (Ref.
123201): -1.8 - 0.9, mean -0.9 °C (based on 436 cells).
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00490 (0.00334 - 0.00718), b=3.26 (3.14 - 3.38), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trophische Ebene (Ref.
69278): 3.4 ±0.1 se; based on diet studies.
Widerstandsfähigkeit (Ref.
120179): mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Fec = 1,400-12,854).
Anfälligkeit der Fischerei (Ref.
59153): Moderate to high vulnerability (52 of 100).
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Klimaanfälligkeit (Ref.
125649): High to very high vulnerability (66 of 100).
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Nährstoffe (Ref.
124155): Calcium = 26.8 [16.2, 66.0] mg/100g; Iron = 0.498 [0.197, 0.983] mg/100g; Protein = 17.1 [16.1, 18.2] %; Omega3 = 0.384 [0.215, 0.659] g/100g; Selenium = 15.5 [6.7, 34.6] μg/100g; VitaminA = 22.2 [4.9, 102.6] μg/100g; Zinc = 0.473 [0.314, 0.718] mg/100g (wet weight); based on
nutrient studies.
