分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (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
生態學
; 淡水 底中水層性. 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 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 18.5 cm SL 雄魚/尚未辨別雌雄; (Ref. 111728); 最大體重: 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).
棲息於小水灣與河與緩慢流動的溪流迴流水。 在晨昏大部份覓食,悄悄靠近較大的魚覓食他們的鱗片。 暗地裡接近它的獵物而且通常瞄準獵物的側面。 它的半透明的身體可能有利於這一個祕密的接近。 在獵物的攻擊大部份以嘴巴閉合的方式, 逐出那鱗片有它的矮胖﹐外部的與向前的直接最初的上頜骨前的與齒骨齒。 這些齒時常被穿與有時失去, 差別的牙齒磨損狀況給定個體指出慣用右邊或左邊.(參考文獻 28733) 輾軋的攻擊逐出如果當他們下沉，採自了嘴巴, 或被逐漸恢復，一些鱗片那是緊鄰吞。 除鱗片之外，它吃水生昆蟲。 稚魚向上到 3 公分仍然不有粗壯的外齒, 因此大部分吃昆蟲與極小的甲殼動物 (例如介形蟲).(參考文獻 40383)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
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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=0.01202 (0.00579 - 0.02498), b=3.18 (3.00 - 3.36), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 4.1 ±0.70 se; based on food items.
回復力 (Ref.
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (13 of 100).
