分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Gymnotiformes (Knifefishes)
電鰻目 (Knifefishes) >
Gymnotidae (Naked-back knifefishes)
裸背電鰻科 (Naked-back knifefishes) > Gymnotinae
Etymology: Gymnotus: Greek, gymnos = naked (Ref. 45335); arapaima: Named for the pirarucu Arapaima gigas (Teleostei: Osteoglossomorpha), referring to the elongate and slightly depressed head, which it resembles. Noun in apposition..
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的; pH range: 6.3 - 7.2. 亞熱帶的
South America: Mamirauá lake system, Lago Tefé, and terra firme swamps near the town of Tefé in Central Amazonia.
南美洲: Mamiraua 湖系統， Lago Tefe 與地 firme 在中央的亞馬遜河中的 Tefe 的城鎮的附近淹沒。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 55.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 41292); 最大體重: 450.00 g (Ref. 41292)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Possess reverse counter shading (lighter on top) in which the dark bands are interrupted dorsally and the pale interband regions merge on the dorsum and in which the dorsum has a silver-blue sheen in life, and very large anterior nares (diameter about that of eye), associated with a large cleft in the anterolateral margin of the ethmoid region resulting in a square anterior margin of snout between the anterior nares. With deep body (body depth 11-13% TL versus 6-10): long head (head length 12.7-13.6% TL versus 8.8-12.6), and depressed head (head depth 53-57% TL versus 58-64) (Ref. 41292).
持有輪廓顛倒的陰影 (顏色淡的在頂端上) 在那一個深色條紋被中斷背面，而且灰白的條紋間的區域在背面上合併與在那一個背面有一個銀色-藍色的光輝活著時，而且非常大的前鼻孔 (直徑大約那眼), 在造成在前鼻孔之間的一個吻的方形前緣的篩骨區域的前外側邊緣中伴隨著一個大的裂縫了。 有深的身體:(體高 11-13% TL 對 6-10) 長的頭部 (頭長 12.7-13.6% TL 對 8.8-12.6), 而且使頭部 (頭部深度 53-57% TL 對 58-64) 蕭條.(參考文獻 41292)
Facultative air-breathing in the genus (Ref. 126274); Juveniles commonly collected in várzea floating meadows, adults in várzea flooded forest but rarely caught in floating meadows where they are presumed to spawn.
稚魚通常在 varzea 漂浮草地收集了, 成魚在 varzea 但是很少被漂浮的草地捕獲的氾濫了森林在那裡它們被推測產卵。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
南美洲: Mamiraua 湖系統， Lago Tefe 與地 firme 在中央的亞馬遜河中的 Tefe 的城鎮的附近淹沒。
Albert, J.S. and W.G.R. Crampton, 2001. Five new species of Gymnotus (Teleostei: Gymnotiformes) from an upper Amazon floodplain, with descriptions of electric organ discharges and ecology. Ichthyol. Explor. Freshwat. 12(3):241-266. (Ref. 41292)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00437 (0.00209 - 0.00911), b=2.98 (2.79 - 3.17), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.2 ±0.40 se; based on food items.
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (42 of 100).
