Actinopteri (ray-finned fishes) > Perciformes/Notothenioidei
(Icefishes) > Nototheniidae
(Cod icefishes) > Trematominae
Etymology: Trematomus: Greek, trematos = hole + Greek, tomo = section, cut (Ref. 45335); lepidorhinus: lepidorhinus from Greek, lepido means scale; rhinus means snout (Ref. 11892).
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 200 - 800 m. Deep-water; 60°S - 78°S
Southern Ocean: inner slope and continental shelf of Antarctica, except the Antarctic Peninsula. Two specimens are reported from South Orkney islands.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 31.0 cm TL male/unsexed; (Ref. 5179)
Morphology | Morphometrics
Adults feed on amphipods (mostly Themisto gaudichaudii), copepods, polychaetes, and mysids.
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
): -1.8 - 1.1, mean -0.9 °C (based on 763 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
): 3.8 ±0.2 se; based on diet studies.
Generation time: 12.2 ( 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 = 2,200).
Vulnerability (Ref. 59153
): High vulnerability (62 of 100) .
Nutrients (Ref. 124155
): Calcium = 20.8 [10.3, 40.0] mg/100g ; Iron = 0.313 [0.186, 0.561] mg/100g ; Protein = 17.3 [16.3, 18.3] % ; Omega3 = 0.39 [0.21, 0.70] g/100g ; Selenium = 16 [7, 34] μg/100g ; VitaminA = 43.2 [11.0, 165.0] μg/100g ; Zinc = 0.423 [0.286, 0.641] mg/100g (wet weight); based on nutrient studies.