Common names from other countries
分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 大洋性. 熱帶
Africa: upper courses of Niger River and Chari-Logone basin (Ref. 2936, 86396).
非洲: 尼日 (+Benoue) 與 Chari-Logone 的高流域。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 3.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 2936)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Diagnosis: size small, body elongate; head length 4-7.6x SL; scale formula 3.5-4.5/46-50/-; 9-11.5 scales between posterior end of adipose and caudal fin base; 12-13 scales around caudal peduncle; 4 or 5 scales between anus and anal-fin origin; pectoral fins usually extending beyond pelvic-fin bases; pelvic fins not extending beyond anus; dorsal-fin origin behind level of pelvic-fin insertions; 9-10 anal fin branched rays; 11-12 dorsal fin branched rays; 12-13 pectoral fin branched rays; 8 pelvic fin branched rays; colour pattern different from other Nannocharax species; 3-4 cross-bars present on back; 3-5 spots along lateral line, connected or not by a dark, narrow, mid-lateral band (Ref. 2936, 86396).
短的身體。 圓頭的吻。 小的眼, 眼間隔高的 19.6-22.5% 頭長。 頭長 13.1-25.2% SL。 在脂鰭與尾鰭基底的後端之間的 9-11.5個鱗片。 3-5個晶體狀的斑點藉著來自鰓蓋到尾鰭基底的縱向條紋沿著側線接合。 3-4個橫紋背面: 在後腦部後面的第一, 第二在背鰭起點, 第三在背鰭與脂鰭之間, 第 4 就在脂肪之後。 在尾鰭的每個葉上的深色的斑點。
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
非洲: 尼日 (+Benoue) 與 Chari-Logone 的高流域。
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)
CITES (Ref. 128078)
Not Evaluated
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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=0.00380 (0.00147 - 0.00981), b=3.11 (2.88 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
