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Eupercaria/misc (Various families in series Eupercaria) >
Sciaenidae (Drums or croakers)
Etymology: Pseudotolithus: Greek, pseudes = false + greek, otos = ear + Greek, lithos = stone (Ref. 45335).
More on author: Valenciennes.
Environment: milieu / climate zone / गहराई सीमा / distribution range
पारिस्थितिकी
समुद्री ड़िमरसल; गहराई सीमा 0 - 70 m (Ref. 3593). Tropical; 27°N - 22°S
Eastern Atlantic: west coast of Africa, from Morocco to Angola, but rare north of Senegal (Ref. 57396). Also reported from Namibia (Ref. 3593).
Length at first maturity / आकार / वज़न / Age
परिपक्व अवधि: Lm 35.0, range 28 - ? cm
Max length : 114 cm TL पुल्लिंग / अलिंग; (Ref. 40637); common length : 50.0 cm TL पुल्लिंग / अलिंग; (Ref. 3593); अधिकतम प्रकाशित वज़न: 12.0 kg (Ref. 40637)
पृष्ठीय रीढ़ (सम्पूर्ण) : 11; पृष्ठीय सौफट रेज़ (सम्पूर्ण) : 28 - 33; गुदा कांटा: 2; ऐनल सौफट रेज़: 7. Diagnosis: large fish, elongate and compressed (Ref. 57396). Eyes small (Ref. 57396, 81656), 5.7-6.4 times in HL, but this character is difficult to use for identification because of allometry (Ref. 81656). Snout short; mouth large and oblique; lower jaw prominent; both jaws with bands of villiform teeth (upper jaw with teeth in outer row larger and sharper, including a pair of large median canines, lower jaw with teeth in inner row larger and sharper); 6 pores on chin and 5 marginal pores on snout (Ref. 57396). 9-12/1/4-6 (total 12-18) gill rakers on 1st gill arch; gill rakers short, about as long as gill filament at angle between lower and upper part of gill arch (Ref. 81656). Dorsal fin long and deeply notched (Ref. 57396), with 10 spines in the first part and 1 spine and 28-33 soft fin rays in second part (Ref. 81656). Second anal fin spine rather short and slender, attaining about 2/3 of the length of 1st soft ray and comprised over 3 times in head length; caudal fin pointed; scales weakly ctenoid on body, cycloid on snout and suborbital region; lateral line extending to end of caudal fin; swim bladder carrot-shaped, its front end with a pair of appendices subdividing into an anterior group of short branches and 2 posterior groups of long, slender tubules, one of them ventral, the other dorso-lateral and longer, bordering the bladder throughout its length (Ref. 57396).
Coloration: silvery grey, with series of small dark spots following scale rows, oblique on anterior part of back and sides, horizontal posteriorly; black spot at tip of spinous part of dorsal fin; pelvics and anal fin more or less dark yellowish; caudal fin dark; inside of gill cover black (Ref. 57396).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Found in coastal waters over muddy, sandy or rocky bottoms. Smaller individuals found in shallow waters, but rarely entering estuaries. Feed on fish (fry of the long-finned herring in Ref. 114789), shrimps and crabs (Ref. 28587). Spawn from November to March in waters of 22 to 25°C in the Gulf of Guinea. Most economically important demersal fish in West African waters.
Chao, L.N. and E. Trewavas, 1990. Sciaenidae. p. 813-826. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref. 3593)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
मात्स्यिकी: लघु वाणिज्य; आखेट मत्स्य: हां
साधन
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इंटरनेट स्रोत
Estimates based on models
Preferred temperature (संदर्भ
123201): 22.7 - 27.9, mean 26.3 °C (based on 82 cells).
Phylogenetic diversity index (संदर्भ
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00415 - 0.01744), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (संदर्भ
69278): 3.8 ±0.71 se; based on food items.
Generation time: 4.2 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
लौटाव (संदर्भ
120179): माध्यम, न्यूनतम जनसंख्या दुगनी होने का समय 1.4 - 4.4 वर्ष। (K=0.33; tmax=8; assuming tm=2).
Prior r = 0.31, 95% CL = 0.20 - 0.46, Based on 1 full stock assessment.
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (40 of 100).
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Climate Vulnerability (Ref.
125649): Very high vulnerability (83 of 100).
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Nutrients (Ref.
124155): Calcium = 74.4 [44.2, 142.6] mg/100g; Iron = 0.878 [0.439, 1.545] mg/100g; Protein = 19.2 [18.0, 20.3] %; Omega3 = 0.193 [0.107, 0.321] g/100g; Selenium = 71.6 [39.2, 141.9] μg/100g; VitaminA = 11.8 [4.2, 34.3] μg/100g; Zinc = 0.805 [0.582, 1.163] mg/100g (wet weight);
