分類 / Names
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Teleostei >
Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335).
More on author: Eigenmann.
Issue
Several morphologically similar populations from Colombia to Uruguay may be referable to this species. This species used to be incorrected listed as Characidium fasciatum (see discussion in Buckup, 1992:1071)
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性. 熱帶
South America: Amazon and Essequibo River basins; and coastal basins of Guiana Shield.
南美洲: 圭亞那的亞馬遜河與 Essequibo 河流域與海岸流域遮蔽。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 7.4 cm SL 雄魚/尚未辨別雌雄; (Ref. 101566)
Lives in groups in the upper reaches of rivers. Common in rapidly flowing water over a sandy or rocky substrate (Ref. 27188). Feeds mainly on insects which they dig from the substrate or pick from the rocks (Ref. 12225). Highly mimetic, the intensity of the black bands depends on the color of the substrate (Ref. 27188).
在河的上游中群居。 常見於在一個沙或岩石的底部上的快速流動的水。 (參考文獻 27188) 主要吃昆蟲他們挖從底部或者剔啄從岩石那一個。 (參考文獻 12225) 高度擬態, 黑色條紋的色彩濃度仰賴底部的顏色.(參考文獻 27188)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
南美洲: 圭亞那的亞馬遜河與 Essequibo 河流域與海岸流域遮蔽。
Buckup, P.A., 2003. Crenuchidae (South American darters). p. 87-95. 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. 37059)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)
無危 (LC) ; Date assessed: 06 May 2020
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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=0.00933 (0.00709 - 0.01229), b=3.08 (3.02 - 3.14), in cm total length, based on LWR estimates for this species (Ref.
93245).
營養階層 (Ref.
69278): 3.5 ±0.3 se; based on diet studies.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
