分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Characidae (Characins; tetras) > Stevardiinae
Etymology: Bryconamericus: Greek, bryko = to bite + America, latinized (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性; 深度上下限 0 - 1 m (Ref. 55781). 亚热带的
South America: Rio Uruguay basin in Argentina.
南方的 Americ: 在阿根廷的 Rio 乌拉圭流域。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 9.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 128951)
简单描述
检索表 | 型态特徵 | 形态测量图
Differs from other species of the genus by the following combination of characters: 17-21 branched anal fin rays, predorsal length (52.5-55.4% SL), preventral length (47.8-51.0% SL), preanal length (63.0-68.8% SL), caudal peduncle length (12.3-14.3% SL) and eye diameter (33.1-37.0% HL). Further differs by having seven to ten dentary teeth decreasing in size gradually, inner premaxillary teeth wider distally; one vertically elongated black humeral spot, separated from a second posterior one by 3 or 4 scales; narrow lateral band becoming wider below middle of dorsal fin base (Ref. 55781).
在组合特征之后有别于其他本属的种藉由: 17-21个分枝的臀鳍棘条, 前背的长度 (52.5-55.4% SL) ， preventral 长度 (47.8-51.0% SL) ，肛门前部分的长度 (63.0-68.8% SL) ，尾柄长度 (12.3-14.3% SL) 与眼直径.(33.1-37.0% HL) 进一步不同之处为末梢部地有逐渐地在大小方面减退的七到十个齿骨齿，内部的上颌骨前的齿比较宽; 一垂直地延长了被 3 或 4 鳞片与一个第二个后面那个分开的黑色的肩部斑点; 狭窄的侧面条纹在背鳍基底的中央之下變得比較寬的.(參考文獻 55781)
Occurs in rapids and small falls with clear flowing water, pools and some areas with slow current (Ref. 55781). The depth of the streams ranges from 0.40 to 1.3 m and the bottom is composed of sand and mostly stones (Ref. 55781).
出现于迅速而小的秋天有清澈的流动水，水池与一些区域且水流和缓的地方.(参考文献 55781) 溪流范围从的深度 0.40 到 1.3 公尺与底部组成份子为沙子与大部份石头.(参考文献 55781)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
南方的 Americ: 在阿根廷的 Rio 乌拉圭流域。
Almirón, A.E., M. Azpelicueta and J.R. Casciotta, 2004. A new species of Bryconamericus from the arroyo Shangay, rio Uruguay basin, Argentina (Teleostei: Characiformes: Characidae). Zool. Abh. Staat. Mus. Tierk. Dresden 54:3-10. (Ref. 55781)
世界自然保护联盟红皮书 (Ref. 130435)
濒危 (EN) (B2ab(iii)); Date assessed: 19 November 2020
人类利用
工具
特别资料
下载 XML
网络资源
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).
营养阶层 (Ref.
69278): 2.6 ±0.3 se; based on size and trophs of closest relatives
回复力 (Ref.
120179): 高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
