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); patriciae: Named in honor to the author's wife, Patricia L. Gonçalves.
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 亞熱帶的; 7°C - ?
South America: Rio Uruguay drainage and Laguna dos Patos drainage in Brazil.
南美洲: 在巴西的 Rio 烏拉圭流域與 Laguna dos Patos 流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 6.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 54750)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Distinguished from other species of Bryconamericus from southern South America by the combination of the following characters: body depth 25.5-30.3% SL, mean 28.0; head length 25.2-27.6% SL, mean 26.3; pelvic fin length 11.0-14.4% SL, mean 12.5; branched anal-fin rays 14-18; teeth of outer row of premaxilla regularly implanted; teeth of inner row of premaxilla pentacuspid; teeth compressed distally; and males with bony hooks on pelvic and anal fins (Ref. 54750).
與來自南美洲南部的其他種的 Bryconamericus 區分了藉由下列特徵的組合: 體高 25.5-30.3% SL, 意謂 28.0; 頭長 25.2-27.6% SL, 意謂 26.3; 腹鰭長度 11.0-14.4% SL, 意謂 12.5; 分枝的臀鰭棘條 14-18; 前頜骨的外部列的齒經常地深植; 前頜骨 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,14-18.(iii,17) 胸鰭鰭條 i ， 10-12.(i,10) 腹鰭鰭條 ii ， 6-7(i,6).(參考文獻 54750)
Inhabits rivers and creeks with clear water, light to strong water current and bottom formed by rocks, stones and in some points gravel and sand (Ref. 54750). Usually occurs in pools below the rapids (Ref. 54750).
棲息於河與小溪，水質清澈的地方, 淡色到強的水流與底部由岩石，石頭形成了與在一些點礫石與沙子中.(參考文獻 54750) 通常在急流之下出現於水池中。 (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: 在巴西的 Rio 烏拉圭流域與 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)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
無危 (LC) ; Date assessed: 07 November 2018
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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=0.00955 (0.00407 - 0.02241), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
營養階層 (Ref.
69278): 2.7 ±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).
