Common names from other countries
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Gonorynchiformes (Milkfishes) >
Chanidae (Milkfish)
Etymology: Chanos: Greek, chanos, -eos, ous, and chasma, -atos = abyss, mouth opened, inmensity (Ref. 45335).
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina; sötvatten; brackvatten bentopelagisk; amfidrom (Ref. 9814); djupintervall 1 - 30 m (Ref. 6898), usually ? - 15 m (Ref. 89972). Tropical; 15°C - 43°C (Ref. 43081); 46°N - 52°S, 19°E - 77°W
Indo-West Pacific: South Africa to Red Sea, to Hawaii and the Marquesas, north to Japan, south to Victoria, Australia. Eastern Pacific: San Pedro, California to the Galapagos.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 86.1, range 68 - 70 cm
Max length : 180 cm SL hane/ej könsbestämd; (Ref. 9710); 124.0 cm SL (female); common length : 100.0 cm SL hane/ej könsbestämd; (Ref. 9814); publicerad maxvikt: 14.0 kg (Ref. 9814); rapporterad maxålder: 15 år (Ref. 9814)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 2; Mjukstrålar i ryggfenan (totalt) : 13 - 17; Taggstrålar i analfenan: 2; Mjukstrålar i analfenan: 8 - 10; Ryggkotor: 46. This species is characterized by the following: body elongate and somewhat compressed; mouth small and toothless; single dorsal about mid-level of the body; pectoral fins falcate; caudal fin large and deeply forked; no scutes on belly; branchiostegal rays 4. Colour of the body olive green dorsally; flanks silvery; unpaired fins with dark margins (Ref. 49, 117228).
Body shape (shape guide): elongated; Cross section: oval.
Adults are found in offshore marine waters and shallow coastal embayments, but also frequently enter estuaries and occasionally penetrate freshwater streams, along continental shelves and around islands, where temperatures are greater than 20°C. (Ref. 44894, 52331). They occur in small to large schools near the coasts or around islands where reefs are well developed. Eggs and larvae are pelagic up to 2-3 weeks. Older larvae migrate onshore and settle in coastal wetlands (mangroves, estuaries) during the juvenile stage, or occasionally enter freshwater lakes. Juveniles and sub-adults return to sea where they mature sexually. Mature adults spawn only in fully saline water. Larvae eat zooplankton; juveniles and adults eat cyanobacteria, soft algae, small benthic invertebrates, and even pelagic fish eggs and larvae. Larvae are collected from rivers and are grown in culture ponds into juveniles which are marketed fresh, smoked, canned or frozen. Brood stocks can be raised and spawned in captivity to produce larvae in the hatchery (Ref. 12868). This species can thrive and grow in water as hot as 32° C (Ref. 9987).
Spawns in clear shallow waters above a bottom of sand or coral and at a distance of not more than 30 km from the shore. Females spawn up to 5 million eggs which hatch in about 24 hr. The larvae seek out clear coastal and estuarine waters warmer than 23°C with 10-32 salinity and abundant phytoplankton. Spawning and fertilization take place at night.
Bagarinao, T., 1994. Systematics, distribution, genetics and life history of milkfish, Chanos chanos. Environ. Biol. Fishes 39(1):23-41. (Ref. 9814)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: kommersiellt viktig; Vattenbruk: kommersiell; sportfisk: ja; bete: usually
Verktyg
Särskilda rapporter
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Uppskattningar baserade på modeller
Önskad temperatur (Ref.
123201): 20.7 - 29.2, mean 28.2 °C (based on 4182 cells).
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 1.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00649 - 0.01116), b=3.06 (2.98 - 3.14), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trofisk nivå (Ref.
69278): 2.5 ±0.14 se; based on food items.
Resiliens (Ref.
120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (tm=4-8; tmax=15; Fec=200,000).
Prior r = 0.28, 95% CL = 0.19 - 0.42, Based on 3 data-limited stock assessments.
Sårbarhet i fisket (Ref.
59153): Very high vulnerability (90 of 100).
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Sårbarhet för klimatet (Ref.
125649): High to very high vulnerability (66 of 100).
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Näringsämnen (Ref.
124155): Calcium = 46.4 [25.2, 89.0] mg/100g; Iron = 0.661 [0.361, 1.169] mg/100g; Protein = 19.8 [15.5, 22.5] %; Omega3 = 0.111 [0.053, 0.225] g/100g; Selenium = 87.2 [39.4, 201.1] μg/100g; VitaminA = 11.4 [3.5, 34.1] μg/100g; Zinc = 1.39 [0.95, 2.06] mg/100g (wet weight); based on
nutrient studies.
