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Teleostei >
Characiformes (Characins) >
Characidae (Characins; tetras) > Characinae
Etymology: Roeboides: Latin, rubus, ruber, reddish.
More on author: Fowler.
Taxonomic Remarks
See Hahn et al. (2000) for dental development and ontogenetic diet shifts.
环境：氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 底中水层性; pH range: 5.8 - 6.8; dH range: ? - 8. 亞熱帶的; 22°C - 26°C (Ref. 2059)
South America: Paraguay and lower Paraná River basins.
南美洲: 巴拉圭與巴拉納河流域下游。
首次成熟时的长度 / 大小 / 重量 / 年龄
成熟度: Lm 43.0 range ? - ? cm
Max length : 8.9 cm SL 雄鱼/尚未辨别雌雄; (Ref. 36811)
Found in inlets and backwaters of rivers and streams. Forages mostly at twilight, stalking larger fishes to feed on their scales. Approaches its intended prey stealthily and usually aims at its flank. Strikes mostly with its mouth closed, dislodging the scales with its stout, external and forward-directed teeth. The jarring strike dislodges a few scales which are swallowed immediately if taken in the mouth, or gathered as they sink. Also feeds on aquatic insects (Ref. 40383).
发现于河川与溪流的小水湾与洄水区了。 在晨昏大部份觅食,悄悄靠近较大的鱼觅食他们的鳞片。 暗地里接近它的属意的猎物而且通常瞄准它的侧面。 大部份以嘴巴闭合的方式攻击, 逐出那鳞片有它的矮胖的，外部的与朝向前齿。 辗轧的攻击逐出如果当他们下沉，采自了嘴巴, 或聚集了，一些鳞片那是紧邻吞。 也吃水生昆虫。 (参考文献 40383)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 巴拉圭與巴拉納河流域下游。
Lucena, C.A.S. de, 2007. Revisão taxonômica das espéces do gênero Roeboides grupo-affinis (Ostariophysi, Characiformes, Characidae). Iheringia, Ser. Zool., Porto Alegre 97(2):117-136. (Ref. 75795)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
人类利用
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基于模型的估算
系统发育多样性指数 (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00444 - 0.02253), b=3.09 (2.89 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
营养阶层 (参考文献
69278): 3.3 ±0.46 se; based on food items.
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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