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Teleostei >
Characiformes (Characins) >
Characidae (Characins; tetras) > Characinae
Etymology: Charax: Charax, -akos = a fish without identification (Ref. 45335).
More on author: Günther.
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: 6.2 - 7.5; dH range: ? - 25. 熱帶; 22°C - 27°C (Ref. 2059)
South America: lower Amazon River basin in Brazil (Ref. 36811). Reported from Suriname (Ref. 59052).
南美洲: 亞馬遜河流域下游。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 10.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 36811)
Because of its form, this species is very easy to capture with a net. The males are very much smaller than the females. Reproduction takes place during the rainy season. The eggs are deposited on the vegetation and its incubation lasts for 30 hours. Below 6 cm, the juveniles prefer to feed on the larvae of Chironomidae and to a lesser degree on Cladocera. Then, by order of preference, they feed on shrimps, Odonata nymphs and fish juveniles of Ctenobrycon and Curimata (Ref. 12225). Frequents all types of environment (Ref. 27188).
由于它的形式 , 这种非常容易用一张网捕获。 雄性非常远小于雌性。 繁殖在雨季的时候发生。 卵被沈淀在植物上面，而且它的孵育持续达 30 小时。 下面 6 公分，稚鱼偏爱觅食摇蚊幼生与较少吃枝角目浮游动物。 然后，藉着偏爱的次序，他们吃 Ctenobrycon 与 Curimata 的虾，蜻蛉蛹与鱼稚鱼。 (参考文献 12225) 常见于所有类型的环境。 (参考文献 27188)
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: 亞馬遜河流域下游。
Planquette, P., P. Keith and P.-Y. Le Bail, 1996. Atlas des poissons d'eau douce de Guyane. Tome 1. Collection du Patrimoine Naturel Volume 22, MNHN, Paris & INRA, Paris. 429 p. (Ref. 12225)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
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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): 3.7 ±0.57 se; based on food items.
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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