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Elopiformes (Tarpons and tenpounders) >
Megalopidae (Tarpons)
Etymology: Megalops: Greek, megas, megalos = great + Greek, ops = appearance (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina; sötvatten; brackvatten bentopelagisk; katadrom (Ref. 138274); djupintervall 1 - 50 m (Ref. 86942). Tropical; 34°N - 37°S, 16°E - 130°W
Indo-Pacific: Persian Gulf (Ref. 68964), Red Sea and Natal, South Africa (Ref. 3969) to the Society Islands, north to southern Korea, south to the Arafura Sea (Ref. 9819) and New South Wales. Restricted to high islands (Palau, Caroline and Mariana islands) in Micronesia. Reported as far inland as the lower Shire in Malawi and the Save-Runde junction in Zimbabwe (Ref. 7248, 52193). Widespread in the Lower Zambezi River channels up to Marromeu and in the Micelo River up to Malingapanzi (Ref. 39494). South China Sea, Taiwan Strait, and East China Sea(Ref.33302).
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm ?, range 25 - ? cm
Max length : 150 cm TL hane/ej könsbestämd; (Ref. 1479); common length : 30.0 cm SL hane/ej könsbestämd; (Ref. 7017); common length :45.5 cm SL (female); publicerad maxvikt: 18.0 kg (Ref. 13337); rapporterad maxålder: 44 år (Ref. 72487)
Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 16 - 21; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 23 - 31.
Body shape (shape guide): elongated; Cross section: compressed.
Obligate air-breathing (Ref. 126274); Adults are generally found at sea, but young inhabit river mouths, inner bays, and mangrove forests. In freshwater, they occur in rivers, lagoons, lakes, and swampy backwaters (Ref. 2847, 44894). Tolerate a wide pH range (5.2-9.1) (Ref. 44894) and salinities from 0 to 100. Mainly diurnal (Ref. 7017). Predaceous, feeding mainly on fishes and crustaceans (Ref. 5213). Breed offshore, possibly throughout the year. Larvae are transparent and resemble larval eels (Ref. 13337), but with a forked tail (Ref. 167). Juveniles commonly enter freshwater (Ref. 44894, 48635) in clear or turbid water (Ref. 44894). Known to breath air, rising regularly to the surface to do so. Cultured in ponds, the fry being sourced from the coasts (Ref. 7050). Popular angling fish (Ref. 3969). Edible but not esteemed (Ref. 3969). Caught by gill nets, seines, and trawls, and by hook-and-line; marketed fresh and dried salted (Ref. 10982).
Whitehead, P.J.P., 1984. Megalopidae. In W. Fischer and G. Bianchi (eds.) FAO species identification sheets for fishery purposes. Western Indian Ocean fishing area 51. Vol. 3. [pag. var.]. FAO, Rome. (Ref. 3463)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: mindre kommeriell; Vattenbruk: kommersiell; sportfisk: ja
Verktyg
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00741 (0.00533 - 0.01030), b=3.07 (2.98 - 3.16), in cm total length, based on LWR estimates for this species (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
3.5 ±0.1 se; based on diet studies. |
Resiliens (Ref. 120179) |
Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Assuming tm<=4). |
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Rate of population increase |
Prior r = 0.57, 95% CL = 0.37 - 0.85, Based on 2 data-limited stock assessments. |
Sårbarhet i fisket (Ref. 59153) |
High to very high vulnerability (69 of 100). 🛈 |
Sårbarhet för klimatet (Ref. 125649) |
High to very high vulnerability (75 of 100). 🛈 |
Priskategori (Ref. 80766) |
Low.
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Näringsämnen (Ref. 124155) |
Calcium = 44.8 [26.3, 77.6] mg/100g; Iron = 0.672 [0.410, 1.048] mg/100g; Protein = 17.1 [14.3, 19.7] %; Omega3 = 0.217 [0.122, 0.396] g/100g; Selenium = 71.1 [41.2, 135.1] μg/100g; VitaminA = 15 [6, 33] μg/100g; Zinc = 1.06 [0.78, 1.46] mg/100g (wet weight); |