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Gymnocrotaphus curvidens, Janbruin : fisheries
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Gymnocrotaphus curvidens
Picture by
King, D.R.
Teleostei (teleosts) >
Eupercaria/misc
(Various families in series Eupercaria) >
Sparidae
(Porgies)
Etymology:
Gymnocrotaphus:
Greek, gymnos = naked + Greek, krotaphos = front, head (Ref.
45335
)
.
More on author:
Günther
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 1 - 80 m (Ref.
3198
). Subtropical
Southeast Atlantic: endemic to South Africa, from the Cape to Durban.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 50.0 cm TL male/unsexed; (Ref.
3198
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 10;
Dorsal
soft rays
(total): 11-12;
Anal
spines
: 3;
Anal
soft rays
: 9 - 10. Eyes deep blue; the brown of live specimens fades quickly, leaving orange lines along the scale rows; sometimes with narrow dark crossbars (Ref.
3198
).
Occurs mostly in shallow rocky areas, but also found down to 80 m. Flesh excellent.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Smith, J.L.B. and M.M. Smith
, 1986. Sparidae. p. 580-594. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref.
3198
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
01 December 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial
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Estimates based on models
Preferred temperature (Ref.
123201
): 18 - 27.5, mean 25.8 °C (based on 84 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01259 (0.00609 - 0.02604), b=3.04 (2.87 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.2 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (40 of 100).
Price category (Ref.
80766
):
Very high
.
Nutrients (Ref.
124155
): Calcium = 75.9 [42.9, 144.0] mg/100g; Iron = 1.06 [0.60, 1.87] mg/100g; Protein = 19.6 [18.8, 20.5] %; Omega3 = 0.365 [0.256, 0.552] g/100g; Selenium = 24.8 [12.4, 46.9] μg/100g; VitaminA = 12.6 [3.8, 35.9] μg/100g; Zinc = 0.74 [0.53, 1.04] mg/100g (wet weight);
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