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Trematomus pennellii, Sharp-spined notothenia
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Trematomus pennellii
Picture by
Zimmermann, C.
Teleostei (teleosts) >
Perciformes/Notothenioidei
(Icefishes) >
Nototheniidae
(Cod icefishes) > Trematominae
Etymology:
Trematomus:
Greek, trematos = hole + Greek, tomo = section, cut (Ref.
45335
)
;
pennellii:
Species name
pennellii
honors Harry LL Pennell, captain of the ship Terra Nova of Scott's British Antarctic Expedition of 1910 (Ref.
45168
)
.
More on author:
Regan
.
Issue
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). The species
Pseudotrematomus centronotus
(Regan, 1914) is recognised as valid.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 732 m, usually 1 - 112 m (Ref.
11892
). Polar; 60°S - 78°S
Southern Ocean: Scotia Arc, South Orkney Islands, Davis and Ross seas.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 29.7 cm TL male/unsexed; (Ref.
124149
); 26.0 cm TL (female); max. published weight: 342.00 g (Ref.
124149
); max. published weight: 342.00 g
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 4 - 6;
Dorsal
soft rays
(total): 32-35;
Anal
soft rays
: 29 - 31. Brownish with 2 or 3 large dark spots, part of spinous dorsal blackish (Ref.
11892
).
Adults live on seafloor and spawns during summer (Ref.
45168
). They feed primarily on errant polychaetes, with lesser amounts of amphipods, fish eggs and mollusks.
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.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest
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Estimates based on models
Preferred temperature (Ref.
123201
): -1.8 - -1.1, mean -1.7 °C (based on 740 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00562 (0.00372 - 0.00849), b=3.26 (3.13 - 3.39), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.3 ±0.2 se; based on diet studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Fec = 2,500-6,600).
Fishing Vulnerability (Ref.
59153
): High vulnerability (63 of 100).
Nutrients (Ref.
124155
): Calcium = 27.8 [14.3, 75.3] mg/100g; Iron = 0.418 [0.183, 0.866] mg/100g; Protein = 17 [16, 18] %; Omega3 = 0.389 [0.199, 0.723] g/100g; Selenium = 14.2 [5.5, 40.4] μg/100g; VitaminA = 23.3 [4.5, 125.4] μg/100g; Zinc = 0.641 [0.397, 1.022] mg/100g (wet weight); based on
nutrient studies.
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