分類 / 名前
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Cypriniformes (Carps) >
Danionidae (Danios) > Chedrinae
Eponymy: Dr Christian Lévêque is a French ichthyologist and hydrobiologist who is Professor Emeritus at IRD (formerly ORSTOM). [...] (Ref. 128868), visit book page.
環境:環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の漂泳性. Tropical
Africa: only known from the Kakrima River and in the middle reaches of the Konkouré River in Guinea (Ref. 2940, 81282).
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 7.8 cm SL オス/雌雄の選別がない; (Ref. 2940)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 11; 臀鰭: 15 - 16. Diagnosis: body depth 4.3x and head length 3.6x SL; eye diameter 3.4-4.0x head length; scale formula 6.5-7.5/36-38/4.5-5.5; 6.5-7.5 scales between lateral line and dorsal fin origin; 36-38 scales in longitudinal series; 8 dorsal-fin branched rays; 12-13 anal-fin branched rays; known only from the Konkouré basin (Ref. 2940, 81282).
Body shape (shape guide): elongated; Cross section: compressed.
Affinities: superficially resembles R. nigeriensis (less bars, more scales).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Lévêque, C., 1990. Cyprinidae. p. 269-361. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douces et saumâtres d'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. 2940)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
脆弱 (VU) (B1ab(iii)); Date assessed: 23 April 2020
人間の用途
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00589 (0.00277 - 0.01251), b=3.00 (2.82 - 3.18), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
栄養段階 (参照 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
回復力 (参照 120179) |
高い, 15か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.). |
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (20 of 100). 🛈 |