Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina bottenlevande; djupintervall 1 - 100 m (Ref. 9792), usually 20 - 50 m (Ref. 9792). Tropical; 26°N - 21°S, 43°E - 156°E (Ref. 54739)
Indo-West Pacific: Red Sea and East Africa to Japan and Australia.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 38.0, range 37 - 39 cm
Max length : 64.0 cm TL hane/ej könsbestämd; (Ref. 6006); common length : 50.0 cm TL hane/ej könsbestämd; (Ref. 5450); publicerad maxvikt: 9.0 kg (Ref. 1468)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 9 - 11; Mjukstrålar i ryggfenan (totalt) : 38 - 45; Taggstrålar i analfenan: 1; Mjukstrålar i analfenan: 33 - 43; Ryggkotor: 23 - 25. Body oval and flat, but thicker than in most other flatfishes. Mouth large with strong teeth; maxillary extends well beyond hind edge of lower eye; both eyes on left or right side; upper eye lying immediately below dorsal edge; gill rakers not developed. Dorsal fin origin well posterior to eyes; anterior fin rays spinous; lateral line almost straight. Color usually brown or grey, sometimes with 4 broad, dark crossbars. Dorsal, anal and caudal fin tips black. Blind side occasionally partially colored. (Other sources of morphological data: Refs. 591, 529, 4416, 5997 and 6000).
Body shape (shape guide): fusiform / normal; Cross section: flattened.
Found on sand and mud bottoms (Ref. 9796, 48637). Usually deeply burried in the substrate during the day, but out and hunting at night (Ref. 48637). Often swims in an upright position (Ref. 9796). Mainly piscivorous (Ref. 5986). Mainly sold fresh (Ref. 5213); also utilized smoked and frozen (Ref. 9987). Processed into fish flour (Ref. 6040).
Studies in Porto Novo, India (Refs. 5993 & 5997) show that the sex ratio significantly differ from 1:1, but the reports are ambiguous as to which sex predominates.
Nielsen, J.G., 1984. Psettodidae. In W. Fischer and G. Bianchi (eds.) FAO species identification sheets for fishery purposes. Western Indian Ocean fishing area 51. Vol. 3. (Ref. 3485)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: kommersiell
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Uppskattningar baserade på modeller
Önskad temperatur (Ref.
123201): 26.6 - 29.1, mean 28.2 °C (based on 1198 cells).
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00509 - 0.00898), b=3.14 (3.06 - 3.22), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trofisk nivå (Ref.
69278): 4.4 ±0.3 se; based on diet studies.
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (K=0.26-0.5; tm=3-4; Fec=300,000).
Prior r = 0.74, 95% CL = 0.49 - 1.11, Based on 3 data-limited stock assessments.
Sårbarhet i fisket (Ref.
59153): Low to moderate vulnerability (29 of 100).
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Sårbarhet för klimatet (Ref.
125649): High to very high vulnerability (68 of 100).
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Näringsämnen (Ref.
124155): Calcium = 122 [62, 249] mg/100g; Iron = 1.15 [0.54, 2.15] mg/100g; Protein = 18.4 [16.9, 19.9] %; Omega3 = 0.181 [0.080, 0.383] g/100g; Selenium = 68 [30, 151] μg/100g; VitaminA = 20.1 [6.2, 65.2] μg/100g; Zinc = 0.728 [0.470, 1.071] mg/100g (wet weight);