分类 / 名称
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Teleostei >
Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); rubrolabiatus: From the Latin ruber (red) and labium (lip) after its bright red colored lips (Ref.26632).
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 大洋性. 熱帶; 23°C - 25°C; 8°N - 4°S
Africa: Lower Guinea endemic, only known from the Sanaga River basin, Cameroon (Ref. 26632, 81638).
非洲: 已知只來自沙那加河流域,喀麥隆了。
大小 / 重量 / 年龄
成熟度: Lm ?  range ? - ? cm
Max length : 6.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 81638)
背棘 (总数) : 0; 背的软条 (总数) : 12 - 14; 臀棘: 0; 臀鳍软条: 9 - 10; 脊椎骨: 37. Diagnosis: 50-53 (Ref. 81638) or 46 (Ref. 26632) scales in lateral line. 6-7 anal fin branched rays; dorsal portions of body with distinct dark, vertically oriented dark marks that form saddle-shaped pigmentation pattern; prominent horizontally elongate, dark spots on mid-lateral surface of body (Ref. 81638).
Body shape (shape guide): elongated; Cross section: compressed.
Found under rocks, in riffles of moderately large rivers (30-50m) in the savannah zone, in areas where there is a strong current (>1m/sec); in all sites where collection took place, there was a rather restricted gallery of shrubs and small trees on the river banks; water was greenish with a transparency of about 50 cm, neutral pH (6.5-7.5), with a high content of dissolved oxygen (6.5-7.5 mg/l) and a rather low conductivity (35-45 µS/cm); water temperatures were between 23 and 25 °C at noon (Ref. 26632).
在稀树草原区中的普通大河 (30-50 公尺) 的急流中,发现于岩石之下了, 在区域中在哪里有一个强的水流.(>1 公尺/秒) 在所有的收集发生了的位置中,在河岸上有一个相当限制的灌木走廊与小的树。 水是呈绿色的透明度大约 50 公分 , 中性酸硷度 (6.5-7.5), 具有一个高的溶氧量 (6.5-7.5 mg/l) 与一个相当低的导电率 (35-45 μ S/公分) 的内容. 水温中午在 23 与 25 °C 之间。 (参考文献 26632)
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
非洲: 已知只來自沙那加河流域,喀麥隆了。
Van den Bergh, E.C., G.G. Teugels, E.J. Coenen and F. Ollevier, 1995. Nannocharax rubrolabiatus, a new species of distichodont fish from the Sanaga River Basin in Cameroon, Africa (Teleostei: Distichodontidae). Ichthyol. Explor. Freshwat. 6(4):349-356. (Ref. 26632)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
易受伤害 (VU) (B2ab(iii)); Date assessed: 16 February 2009
人类利用
渔业: 潜在的兴趣
工具
特别资料
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网络资源
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=0.00447 (0.00186 - 0.01072), b=3.17 (2.97 - 3.37), 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): 3.2 ±0.4 se; based on size and trophs of closest relatives
渔业脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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