分类 / Names
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Teleostei >
Characiformes (Characins) >
Characidae (Characins; tetras) > Characinae
Etymology: Roeboides: Latin, rubus, ruber, reddish.
More on author: Boulenger.
Issue
This species is synonym of Roeboides affinis (Günther, 1868) in Eschmeyer (CofF ver. May 2011: Ref. 86870) following Lucena (2007: Ref. 75795). The species page will be removed.
Environment: milieu / climate zone / depth range / distribution range
生态学
; 淡水 底中水层性. 亞熱帶的
South America: Paraguay, middle and lower Paraná, and Uruguay River basins.
南美洲: 巴拉圭， Parana 中下游與烏拉圭河流域。
大小 / 重量 / 年龄
Maturity: Lm ? range ? - ? cm
Max length : 18.5 cm SL 雄鱼/尚未辨别雌雄; (Ref. 111728); 最大体重: 76.00 g (Ref. 111728)
Inhabits inlets and backwater of rivers and slow-flowing streams. Forages mostly at twilight, stalking larger fishes to feed on their scales. Approaches its prey stealthily and usually aims at prey's flank. Its translucent body likely favor this stealthy approach. Strikes at prey mostly with its mouth closed, dislodging the scales with its stout, external and forward directed foremost premaxillary and dentary teeth. These teeth are often worn and sometimes missing, the differential teeth wear indicating right or left-handedness of a given individual (Ref. 28733). The jarring strike dislodges a few scales which are swallowed immediately if taken in the mouth, or are picked up as they sink. Besides scales, it feeds on aquatic insects. Juveniles up to 3 cm still do not bear the stout external teeth, hence feed mostly on insects and tiny crustaceans (e.g. ostracods) (Ref. 40383).
栖息于小水湾与河与缓慢流动的溪流回流水。 在晨昏大部份觅食,悄悄靠近较大的鱼觅食他们的鳞片。 暗地里接近它的猎物而且通常瞄准猎物的侧面。 它的半透明的身体可能有利于这一个秘密的接近。 在猎物的攻击大部份以嘴巴闭合的方式, 逐出那鳞片有它的矮胖，外部的与向前的直接最初的上颌骨前的与齿骨齿。 这些齿时常被穿与有时失去, 差别的牙齿磨损状况给定个体指出惯用右边或左边.(参考文献 28733) 辗轧的攻击逐出如果当他们下沉，采自了嘴巴, 或被逐渐恢复，一些鳞片那是紧邻吞。 除鳞片之外，它吃水生昆虫。 稚鱼向上到 3 公分仍然不有粗壮的外齿, 因此大部分吃昆虫与极小的甲壳动物 (例如介形虫).(参考文献 40383)
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔鱼
南美洲: 巴拉圭， Parana 中下游與烏拉圭河流域。
Lucena, C.A.S. and N.A. Menezes, 2003. Subfamily Characinae (Characins, tetras). p. 200-208. 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. 36811)
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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=0.01072 (0.00500 - 0.02297), b=3.16 (2.98 - 3.34), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (Ref.
69278): 4.1 ±0.70 se; based on food items.
回复力 (Ref.
120179): 中等的, 族群倍增时间最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (13 of 100).
