分类 / Names
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335).
More on author: Günther.
Issue
Junior synonym Nannocharax seyboldi Schultz, 1942 is valid according to
Environment: milieu / climate zone / 深度上下限 / distribution range
生态学
; 淡水 大洋性; pH range: 6.0 - 7.5; dH range: 7 - 15; 河川洄游 (Ref. 51243). 熱帶; 22°C - 27°C (Ref. 1672)
Africa: widespread, known from Senegal to Cameroon, including the Lake Chad basin (Ref. 2936, 80507, 81638, 86396). Also in the Dja and Bumba rivers (middle Congo River basin) in Cameroon (Ref. 46233). Reported from Ntem and Kribi Rivers (Ref. 51193), but not confirmed in Ref. 81638. Holotype from Gabon (Ref. 93570), without further specifications.
非洲: 塞內加爾， Konkoure ， Kolente ，很少 Scarcies ， Waanje ，聖保羅, 聖約翰， Cess ，卡瓦利上游，薩桑德拉河上游， Bandama ，我， Comoe ， Bia ， Pra ，佛塔河, 尼日 + Benoue ，十字河與查德流域。
大小 / 重量 / 年龄
成熟度: Lm ? range ? - ? cm
Max length : 6.6 cm SL 雄鱼/尚未辨别雌雄; (Ref. 2936)
简单描述
检索表 | 型态特徵 | 形态测量图
背棘 (总数) : 0; 背的软条 (总数) : 11 - 14; 臀棘: 0; 臀鳍软条: 8 - 12. Diagnosis: body slightly elongate; head length 3.7-4.3x SL; 2.5-6 scales between anus and anal-fin base; 12-16 scales around caudal peduncle; 12-18 pectoral branched rays; 8-10 pelvic branched rays; series of separate spots along lateral line, not always distinct (frequently suffused by marbled color pattern on sides); scale formula 4-5.5/40-46 (Ref. 2936, 86396). 43-46 pored (except terminal 1-2) lateral line scales (Ref. 81638). Tip of pelvic fin extending distinctly beyond vent; dorsal portions of body with distinct dark, vertically oriented dark marks forming saddle-shaped pigmentation pattern; various dark marks on lateral surface of body without prominent, horizontally elongate dark spots on mid-lateral surface of body; dark pigmentation on body above horizontal through base of pectoral fin (Ref. 81638). 12-14 (Ref. 81638) or 11-14 (Ref. 2936, 86396) total dorsal fin branched rays. 10-12 (Ref. 81638) or 8-12 (Ref. 2936, 86396) total anal fin branched rays.
Body shape (shape guide): elongated.
短的圆头吻。 侧面的眼睛。 头长 23.3-27.3% SL。 在脂肪到尾鳍基底的后端之间的 6-11个鳞片。 鳍有时有显着的斑点形成 2-3个横纹了不规则的: 2 在背鳍与尾鳍上,1 在臀鳍与腹鳍上。 臀鳍起点时常有显着的深色斑点。 脂鳍有深色的圆斑点。 当成鱼时的背部红色的顶端。 2.5-6 在肛门与臀鳍起源之间的鳞片。 个别的斑块沿着侧线不常看得见的。 背面的 7-11 横纹。 胸鳍达成腹面的起源。
Maximum TL was recorded at 7.8 cm (Ref. 7094). Feeds on small invertebrates (Ref. 13614).
最大体长TL记录为 7.8 公分。 (参考文献 7094)
Life cycle and mating behavior
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
非洲: 塞內加爾， Konkoure ， Kolente ，很少 Scarcies ， Waanje ，聖保羅, 聖約翰， Cess ，卡瓦利上游，薩桑德拉河上游， Bandama ，我， Comoe ， Bia ， Pra ，佛塔河, 尼日 + Benoue ，十字河與查德流域。
Gosse, J.-P. and E.J. Coenen, 1990. Distichodontidae. p. 237-260. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres de l'Afrique de l'Ouest. Tome I. Coll. Faune Tropicale n° XXVIII. Musée Royal de l'Afrique Centrale, Tervuren and O.R.S.T.O.M., Paris, 384 p. (Ref. 2936)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-1)
人类利用
渔业: 商业性; 水族馆: 商业性
工具
特别资料
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Estimates based on models
Phylogenetic diversity index (参考文献
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00296 - 0.01020), b=3.22 (3.05 - 3.39), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
营养阶层 (参考文献
69278): 3.4 ±0.45 se; based on food items.
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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