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).
Environment: milieu / climate zone / depth range / distribution range
Marine; bathydemersal; depth range 0 - 1191 m (Ref. 45168), usually 65 - 832 m. Deep-water; 61°S - 78°S
Southern Ocean: coasts of Antarctic Peninsula, Queen Mary, Adelie, South Victoria Coasts, Davis, Ross and Weddell seas.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL male/unsexed; (Ref. 5179); common length : 20.0 cm NG male/unsexed; (Ref. 45168)
(total): 5 - 7;
soft rays: 31 - 35. Body brownish, fins darker except first dorsal. With 4 or 5 irregular darker cross-bars, inside of mouth and branchial cavities blackish (Ref. 11892).
Found more commonly at depths greater than 300 m. Adults feed on amphipods (mainly Orchomene plebs), errant polychaetes, and in lesser amounts, fishes. Isopods and other crustaceans are probably included in the diet.
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 Red List Status (Ref. 123251)
CITES (Ref. 123416)
Threat to humans
Fisheries: of no interest
Estimates based on models
Preferred temperature (Ref. 115969
): -1.9 - 1.2, mean -0.9 °C (based on 2083 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00741 (0.00309 - 0.01779), b=3.15 (2.94 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.3 ±0.48 se; based on food items.
Generation time: 11.0 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Fec = 5,900).
Vulnerability (Ref. 59153
): High vulnerability (61 of 100) .