Teleostei >
Anguilliformes (Eels and morays)
鰻鱺目 (Eels and morays) >
Anguillidae (Freshwater eels)
鰻鱺科 (Freshwater eels)
Etymology: Anguilla: Latin, anguilla, .-ae = eel (Ref. 45335).
More on author: Peters.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 淡水; 半鹹淡水 居於水底的; 降海洄游 (Ref. 51243). 熱帶; 25°N - 35°S
Western Indian Ocean: east coast rivers of Africa from Kenya south to Cape Agulhas, also in Madagascar and other western Indian Ocean islands (Ref. 7248, 52193). Reported from New Caledonia (Ref. 11889).
西印度洋: 來自肯亞的非洲的東海岸河南至艾古哈斯角, 也馬達加斯加與其他的西印度洋島。 移動相當深入內陸。 記錄來自新加勒多尼亞了。 (參考文獻 11889)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 150 cm TL 雄魚/尚未辨別雌雄; (Ref. 3506); 120.0 cm SL (female); 最大體重: 5.7 kg (Ref. 52193); 最大體重: 5.7 kg; 最大年齡: 20 年 (Ref. 48660)
背棘 (總數) : 0; 臀棘: 0.
背部橄欖色到黑灰色, 腹部顏色較淡.(參考文獻 3971) 尾鰭與背鰭與臀鰭匯合。
Migratory species, which breeds in the ocean (Ref. 52331). Inhabits both quiet and fast flowing water (Ref. 13337). Elvers ascend rivers mainly at night and overcome waterfalls and walls of dams with great determination. Adults usually sedentary. Females can attain 120 cm SL and are generally longer and heavier than males (Ref. 48660). Carnivorous, eats dead or living prey but especially fish and crabs. After feeding in fresh water for ten years or more, adults assume a silver breeding dress, the eyes become enlarged and they return to sea to breed. Considered to breed east of Madagascar, but thought to move south of that island on its way to the Mozambique coast and South African rivers (Ref. 13337). Flesh fatty but highly esteemed as smoked or jellied eel (Ref. 5214). Caught with various types of nets (Ref. 4967).
迴游種, 在海洋中繁殖.(參考文獻 52331) 棲息於安靜與快速的流動水。 (參考文獻 13337) 鰻苗主要地在晚上上溯到河而且用大的決心克服瀑布與水壩的牆壁。 成魚通常定棲的。 雌性能達到 120 公分 SL 而且通常比雄性更長與重。 (參考文獻 48660) 肉食性, 吃死或活的獵物但是尤其魚與螃蟹。 在覓食於淡水十年或十年以上之後, 成魚呈現一件銀色的繁殖服裝,眼變成增大，而且他們返回大海繁殖。 被認為是繁殖馬達加斯加東方, 但是認為移動那一個島南方在它的方法到莫三比克海岸與南非河.(參考文獻 13337) 肉脂肪的但是深受喜愛的當煙燻或凝成膠狀的鰻魚.(參考文獻 5214) 用各種不同類型的網捕獲了。 (參考文獻 4967)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
西印度洋: 來自肯亞的非洲的東海岸河南至艾古哈斯角, 也馬達加斯加與其他的西印度洋島。 移動相當深入內陸。 記錄來自新加勒多尼亞了。 (參考文獻 11889)
Castle, P.H.J., 1984. Anguillidae. p. 34-37. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3506)
IUCN 瀕危狀態 (Ref. 130435)
近危 (NT) (A2bcde); Date assessed: 08 November 2018
人類使用
漁業: 商業性; 養殖: 商業性; 游釣魚種: 是的
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Estimates based on models
Preferred temperature (Ref.
123201): 19.6 - 27.5, mean 26.4 °C (based on 98 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00089 (0.00051 - 0.00156), b=3.20 (3.05 - 3.35), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.3 ±0.55 se; based on food items.
Generation time: 26.8 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (K=0.04).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (81 of 100).
