分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Siluriformes (Catfishes)
鯰形目 (Catfishes) >
Doradidae (Thorny catfishes)
陶樂鯰科 (Thorny catfishes) > Doradinae
Etymology: Megalodoras: Greek, megas, megalos = great + Greek, doras = skin (Ref. 45335).
More on authors: Eigenmann & Eigenmann.
Issue
Species-level distinctiveness of Tocantins and Amazonas Megalodoras not investigated.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 居於水底的. 熱帶; 22°C - 25°C (Ref. 2059)
South America: Amazon, Tocantins and Essequibo River basins.
南美洲: 亞馬遜河, Tocantins 與 Essequibo 河流域。
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm ?, range 54 - ? cm
Max length : 53.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 9081); 60.0 cm SL (female); common length : 49.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 9081); 最大體重: 2.9 kg (Ref. 9081); 最大體重: 2.9 kg
Occurs in small groups and occasionally forms schools. Inhabits rivers. Is mainly diurnal. Feeds on the fruits of Licania longipetala and Astrocaryum jauary. Also feeds on pulmonate snails (Ref. 9086).
形成小群魚群而且偶然地形成魚群。 棲息於河。 主要日行性。 吃 Licania longipetala 與 Astrocaryum jauary 的果實。 也吃有肺的蝸牛。 (參考文獻 9086)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
南美洲: 亞馬遜河, Tocantins 與 Essequibo 河流域。
Sabaj, M.H. and C.J. Ferraris Jr., 2003. Doradidae (Thorny catfishes). p. 456-469. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 37054)
人類使用
漁業: 商業性
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00559 - 0.01790), b=3.06 (2.90 - 3.22), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 2.7 ±0.39 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 to high vulnerability (49 of 100).