分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (Characins; tetras) > Stevardiinae
Etymology: Bryconamericus: Greek, bryko = to bite + America, latinized (Ref. 45335); ecai: From the Tupi-Guarani eçai, meaning small eye, in allusion to the smaller eye diameter in comparison to other Bryconamericus species..
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 亞熱帶的
South America: Laguna dos Patos drainage in Rio Grande do Sul, Brazil.
南美洲: 在 Rio Grande do Sul 巴西的 Laguna dos Patos 流域。
大小 / 重量 / 年齡
Maturity: Lm ?  range ? - ? cm
Max length : 7.5 cm SL 雄魚/尚未辨別雌雄; (Ref. 54750)
簡短描述
型態特徵 | 形態測量圖
Distinguished from other species of Bryconamericus by the combination of the following characters: body depth 33.1-36.9% SL, mean 34.9; eye diameter 31.1-33.9% HL, mean 32.3; snout length 26.8-32.4% HL, mean 29.6; branched anal-fin rays 15-18; teeth of inner row of premaxilla tricuspid or pentacuspid; teeth compressed distally; and males with bony hooks on pelvic and anal fins (Ref. 54750).
與其他種的 Bryconamericus 區分了藉由下列特徵的組合: 體高 33.1-36.9% SL, 意謂 34.9; 眼直徑 31.1-33.9% HL, 意謂 32.3; 吻的長度 26.8-32.4% HL, 意謂 29.6; 分枝的臀鰭棘條 15-18; 前頜骨三尖瓣或 pentacuspid 的內部列的齒; 齒扁長形的末梢部地; 而且在腹鰭與臀鰭上雄性有多骨的鉤.(參考文獻 54750)
描述: 背鰭鰭條 ii,8. 臀鰭棘條 iii-iv,15-18. 胸鰭鰭條 i , 10-12. 腹鰭鰭條 i , 6-7.(參考文獻 54750)
Occurs in a creek with clear to turbid water, light to moderate water current and bottom with stones and sand (Ref. 54750).
用清澈至混濁的水, 淡色到中等的水流出現於一條小溪而且用石頭與沙子出現於底部。 (參考文獻 54750)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 在 Rio Grande do Sul 巴西的 Laguna dos Patos 流域。
da Silva, J.F.P., 2004. Two new species of Bryconamericus Eigenmann (Characiformes: Characidae) from southern Brazil. Neotrop. Ichthyol. 2(2):55-60. (Ref. 54750)
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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=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 2.6 ±0.3 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).