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Nannocharax ansorgii Boulenger, 1911

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Nannocharax ansorgii
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> Characiformes (Characins) > Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335).
Eponymy: Dr William John Ansorge (1850–1913) was an English explorer and collector who was active in Africa in the second half of the 19th century. [...] (Ref. 128868), visit book page.
More on author: Boulenger.

Environment: milieu / climate zone / depth range / distribution range 生態学

; 新鮮な水 外洋の; pH range: 7.0 - 7.8; dH range: ? - 15; potamodromous (Ref. 51243). Tropical; 22°C - 26°C (Ref. 13614)

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Africa: upper basin of Senegal River and Gambia River, Geba and Culufi River (Guinea Bissau), Waanje River (Sierra Leone), Niger River, including Benue River, Bandama River (Côte d'Ivoire), Comoé River in Côte d'Ivoire and Burkina Faso, Volta River and Pra River (Ghana), and Chari Logone Chari-Logone in Chad-Cameroon-Central African Republic (Ref. 2936, 86396).

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 3.7 cm SL オス/雌雄の選別がない; (Ref. 2936)

簡単な記述 検索表 | 形態学 | 形態計測学

Diagnosis: snout and anal fin short; head length 22.9-31.8% SL; scale formula 5-6/42-45/-; 13-16 scales around caudal peduncle; 1.5-3 scales between anus and anal-fin origin; development lateral line variable with geographical region; pectoral fins not reaching to pelvic-fin bases; dorsal-fin origin distinctly ahead of pelvic-fin insertions; 8-12 anal fin branched rays; 11-14 dorsal fin branched rays; 10-13 pectoral fin branched rays; 8-10 pelvic fin branched rays; back usually uniformly brown (sometimes with cross-bars); dark band covering mid-lateral series of scales, and extending unto central caudal-fin rays (Ref. 2936, 86396).

生物学     用語集 (例 epibenthic)

Maximum TL was recorded at 4.6 cm (Ref. 7094).

Life cycle and mating behavior 成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生

主な参考文献 Upload your references | 参考文献 | コーディネーター | 協力者

Teugels, G.G., C. Lévêque, D. Paugy and K. Traoré, 1988. État des connaissances sur la faune ichtyologique des bassins côtiers de Côte d'Ivoire et de l'ouest du Ghana. Rev. Hydrobiol. Trop. 21(3):221-237. (Ref. 272)

IUCNのレッドリストの状況は (Ref. 130435: Version 2024-1)

  軽度懸念 (LC) ; Date assessed: 20 October 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

水産業: 商業; 水族館・水槽: 商業
FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00447 (0.00189 - 0.01058), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.1   ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).
価格帯 (Ref. 80766):   Unknown.