Anguilla anguilla, European eel : fisheries, aquaculture, gamefish

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Anguilla anguilla (Linnaeus 1758)

European eel
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Native range | All suitable habitat | Point map | Year 2100
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Anguilla anguilla   AquaMaps   Data sources: GBIF OBIS
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Image of Anguilla anguilla (European eel)
Anguilla anguilla
Picture by V. Tachos & D. Bobori

رده بندی / Names اسامي عام | مترادف | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

> Anguilliformes (Eels and morays) > Anguillidae (Freshwater eels)
Etymology: Anguilla: Latin, anguilla, .-ae = eel (Ref. 45335).  More on author: Linnaeus.

Environment: milieu / climate zone / depth range / distribution range بوم شناسي

; دريايي; آب شيرين; لب شور نزديك كف زي; دريا كوچ (Ref. 51243); تغييرات عمق 0 - 700 m (Ref. 54218).   Temperate; 4°C - 20°C (Ref. 2059); 75°N - 8°N, 82°W - 45°E (Ref. 42249)

پراكنش كشورها | مناطق سازمان خوار و بار جهاني (FAO) | Ecosystems | ظهور | Point map | معرفي | Faunafri

Atlantic Ocean: Atlantic coast from Scandinavia to Morocco; Baltic, Black and Mediterranean Seas; rivers of North Atlantic, Baltic and Mediterranean seas (Ref. 172, Ref. 51442). Continuous introductions to Asia and South and Central America. Spawning area in western Atlantic (Sargasso Sea). At least one country reports adverse ecological impact after introduction. Recent genomic DNA studies show that the European eel exhibits isolation by distance, implying that non-random mating and restricted gene flow among eels from different location exists (Ref. 43723). The existence of 3 genetically distinct sub-populations is suggested: a Northern European subpopulation (consisting mainly of the Icelandic stocks); a Western European subpopulation (including the Baltic, the Mediterranean and Black Sea); a Southern sub-population (including stocks of Morocco) (Ref. 43723, 89139). International trade restricted (CITES Appendix II, since 13.3.2009).

Length at first maturity / Size / Weight / سن

Maturity: Lm ?, range 45 - 65 cm
Max length : 122 cm TL جنس نر / بدون خواص جنسي; (Ref. 88166); 133.0 cm TL (female); common length : 35.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 6125); common length :50 cm TL (female); بيشينه وزن گزارش شده: 6.6 kg (Ref. 39903); بيشينه وزن گزارش شده: 6.6 kg; بيشينه سن گزارش شده: 88 سال ها (Ref. 72468)

توصيف مختصر ريخت شناسي | ريخت ستجي بوسيله انداره گيري

خارهاي باله پشتي (کل): 0; خارهاي باله مخرجي 0; مهره ها: 110 - 120. Elongated, anguilliform body (Ref. 51442), cylindrical anteriorly, somewhat compressed posteriorly (Ref. 6125). Lower jaw slightly longer and projecting (Ref. 6125, Ref. 51442). Gill openings small and vertical, restricted to the sides (Ref. 6125). Elongated dorsal and anal fins, confluent with caudal fin (Ref. 6125, Ref. 51442), forming one unique fin from the anus to the middle of the back with minimum 500 soft rays (Ref. 40476). Dorsal fin origin far behind pectoral fins; anal fin origin slightly behind anus, well back from origin of dorsal fin (Ref. 6125). Pelvic fins absent (Ref. 2196, Ref. 51442). Greenbrown colored (Ref. 51442).

زيست شناسي     واژه نامه (بعنوان مثال epibenthic)

Inhabits all types of benthic habitats from streams to shores of large rivers and lakes. Naturally found only in water bodies connected to the sea (Ref. 59043). Territorial and solitary species; 'schools' of young eels which are observed from time to time are a mass response to outward conditions and not of active assembling (Ref. 172). Amphihaline (Ref. 51442). Migrates to the depths of the Sargasso Sea to spawn (Ref. 172, 51442). Eel larvae (leptocephali) are transparent ribbon-like. They are brought to the coasts of Europe by the Gulf Stream in 7 to 11 months time (Ref. 51442) and can last for up to 3 years (Ref. 8994). They are transformed into glass eels (6-8 cm length, cylindrical in shape and transparent to slightly pigmented in colour). They enter the estuaries and colonize rivers and lakes (Ref. 11941, 51442); some individuals remain in estuaries and coastal waters to grow into adults (Ref. 88171). The glass eel stage is followed by a long feeding period (from the yellow to the silver eel stage) lasting 6-12 years in males (Ref. 6125) and 9-20 years in females (Ref. 6125). Yellow and silver eels are benthic, found under stones, buried in the mud or in crevices (Ref. 89138). Yellow eels eventually lose their pigmentation, becoming dark dorsally and silver ventrally (called silver eels). Silver eels are also characterized by a clear contrasting black lateral line and enlarged eyes (Ref. 6125). At the end of their growth period, they become sexually mature, migrate to the sea and cover great distances during their spawning migration (5,000-6,000 km); with extensive daily vertical migrations between 200 m at night and 600 m during day time, possibly for predator avoidance (Ref. 89140). Gametogenesis occurs entirely during spawning migration. Average life span is usually 15-20 years (Ref. 88171). Male eels can grow up to 50 cm TL (Ref. 39903). Occurs at temperatures ranging from 0-30°C (Ref. 172). Its food includes virtually the whole aquatic fauna (freshwater as well as marine) occurring in the eel's area, augmented with animals living out of water, e.g. worms (Ref. 172). Best temperature for making eels sexually mature is 20-25°C (Ref. 35388). Sensitive to weak magnetic fields (Ref. 89141, 89142). Their high fat content and benthic feeding habits in continental waters make them vulnerable to the bioaccumulation of pollutants, such as heavy metals and organic contaminants, that may result in organ damage and impaired migration capability (Ref. 82710) and lowered genetic variability (Ref. 82711). Review of information supports the view that the European eel population as a whole has declined in most areas, the stock is outside safe biological limits and current fisheries not sustainable (Ref. 82712). Obvious decreasing of the stocks for all the continental native distribution area (Ref. 40476). Utilized fresh, dried or salted, smoked and frozen; can be fried, boiled and baked (Ref. 9988).

Life cycle and mating behavior بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)

Catadromous species. When sexual maturity is reached they leave the river. Spawning migrations occur mainly during the second half of the year but have been observed year-round, usually commencing during dark nights (Ref. 172). Maturity is obtained during the spawning migration (Ref. 88171). Actual spawning has never been observed but is believed to occur solely in the Sargasso Sea between March and June (Ref. 89144). After spawning (at 600 m depth) adults die. Sigmund Freud described the testicles of eel (Ref. 72449).

مآخذ اصلی Upload your references | مراجع | هماهنگ كننده | همكاران

Deelder, C.L., 1984. Synopsis of biological data on the eel, Anguilla anguilla (Linnaeus, 1758). FAO Fish. Synop. (80, Rev. 1):73 p. (Ref. 172)

وضعيت در فهرست قرمز IUCN (Ref. 123251)

  درمعرض خطر بحرانی (CR) (A2bd+4bd); Date assessed: 07 November 2018

CITES (Ref. 123416)

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استفاده انسانی

ماهي گيري – شيلات: تجاري; آبزي پروري: تجاري; ماهي ها ي سرگرم كننده: بله
FAO(آبزي پروري: production, نمايه گونه; ماهي گيري – شيلات: production, نمايه گونه; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us


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منابع اينترنتي

Estimates based on models

Preferred temperature (Ref. 115969): 3 - 14.5, mean 7.9 °C (based on 1203 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00095 (0.00084 - 0.00108), b=3.17 (3.13 - 3.21), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophic level (Ref. 69278):  3.6   ±0.3 se; based on diet studies.
Generation time: 8.9 (7.5 - 14.1) years. Estimated as median ln(3)/K based on 28 growth studies.
جهندگی (Ref. 120179):  پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (K=0.1; tm=6-30; tmax=23).
Prior r = 0.20, 95% CL = 0.13 - 0.30, Based on 2 stock assessments.
آسيب پذيری (Ref. 59153):  High vulnerability (64 of 100) .
طبقه قيمت (Ref. 80766):   Unknown.