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Lithognathus mormyrus, Sand steenbras : fisheries, gamefish
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Lithognathus mormyrus
Picture by
Patzner, R.
Teleostei (teleosts) >
Eupercaria/misc
(Various families in series Eupercaria) >
Sparidae
(Porgies)
Etymology:
Lithognathus:
Greek, lithos = stone + Greek, gnathos = jaw (Ref.
45335
)
.
More on author:
Linnaeus
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; brackish; demersal; depth range 0 - 150 m (Ref.
3688
), usually 10 - 20 m (Ref.
37413
). Subtropical; 48°N - 35°S, 25°W - 36°E
Eastern Atlantic: Bay of Biscay, Strait of Gibraltar and Mediterranean; southward to Cape of Good Hope, South Africa; around the Canary and Cape Verde Islands (Ref.
3688
); and Madeira Is (Ref.
74541
). Western Indian Ocean: southern Mozambique (Ref.
3688
). Not found in tropical east Africa (Ref.
3198
), Red Sea (Ref.
84159
) and Black Sea (Ref.
4781
,
112870
).
Length at first maturity / Size / Weight / Age
Maturity: L
m
17.4
, range 20 - ? cm
Max length : 55.0 cm TL male/unsexed; (Ref.
3397
); common length : 30.0 cm TL male/unsexed; (Ref.
3688
); max. reported age: 12 years (Ref.
13716
)
Dorsal
spines
(total): 11;
Dorsal
soft rays
(total): 12-13;
Anal
spines
: 3;
Anal
soft rays
: 10 - 11
Found on the shelf, over sandy and muddy bottoms as well as seagrass-beds and estuaries. Gregarious, sometimes forming sizeable schools. Feeds on worms, mollusks and small crustaceans. Protandric hermaphrodite (Ref.
3688
). Flesh excellent (Ref.
3198
); sold fresh and dried.
A monandric species (Ref.
55367
). In the northern Adriatic, overall male to female ratio was 1:1.62. Sex inversion occurred mainly between 24.1 and 35.2 cm TL and 3.5 years of age (Ref.
55367
). Conflicting descriptions of the reproductive style of this species have been reported, including possible gonochorism (Ref.
103751
). Also Ref. 28504.
Bauchot, M.-L. and J.-C. Hureau
, 1990. Sparidae. p. 790-812. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref.
3688
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
16 August 2009
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; gamefish: yes
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landings
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 17.1 - 27.5, mean 24.4 °C (based on 224 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01202 (0.01073 - 0.01347), b=3.02 (2.99 - 3.05), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.50 se; based on food items.
Generation time: 4.8 (4.0 - 5.6) years. Estimated as median ln(3)/K based on 12
growth studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.24; tm=2).
Prior r = 0.70, 95% CL = 0.46 - 1.05, Based on 3 stock assessments.
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (40 of 100).
Climate Vulnerability (Ref.
125649
): Low to moderate vulnerability (31 of 100).
Price category (Ref.
80766
):
Medium
.
Nutrients (Ref.
124155
): Calcium = 72.3 [42.6, 133.6] mg/100g; Iron = 1.06 [0.62, 1.89] mg/100g; Protein = 19 [18, 21] %; Omega3 = 0.417 [0.289, 0.641] g/100g; Selenium = 28.2 [14.1, 49.5] μg/100g; VitaminA = 9.68 [3.47, 23.67] μg/100g; Zinc = 0.831 [0.601, 1.145] mg/100g (wet weight); based on
nutrient studies.
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