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Petrocephalus ansorgii Boulenger, 1903

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drawing shows typical species in Mormyridae.

Nigeria country information

Common names: Faya, Okpukpu
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Distributed in Upper and Lower Niger, Benue and Cross River (Ref. 31256). Known from the Ogun River (Ref. 13331).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ni.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Bigorne, R., 1990
National Database:

Common names from other countries

Ansorge`i kivipeakala, Faya, Rypoun agberský, ... more

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

> Osteoglossiformes (Bony tongues) > Mormyridae (Elephantfishes)
Etymology: Petrocephalus: Latin, petra = stone + Greek, kephale = head (Ref. 45335).
  More on author: Boulenger.

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

; 新鮮な水 底生の.   Tropical; 20°C - 25°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 and Lower Niger, the Bénuoé, coastal rivers of Nigeria.

Length at first maturity / サイズ / 重さ / 年齢

Maturity: Lm 1.8  range ? - ? cm
Max length : 14.1 cm SL オス/雌雄の選別がない; (Ref. 2915)

簡単な記述 検索表 | 形態学 | 形態計測学

背面の脊椎 (合計) : 0; 背鰭 (合計) : 29 - 34; 肛門の骨: 0; 臀鰭: 35 - 39. Body depth 2.9-3.5 x SL, caudal peduncle depth 18.8-21.6 x SL, base of anal fin 3.1-3.4 x SL. Eye diameter 3.0-3.5 x head length. Body silvery with 1st rays of dorsal darkened and dorsal spot separate from dorsal fin.

生物学     用語集 (例 epibenthic)

Affinities: P. bane and P. sauvagii.

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 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

Bigorne, R., 1990. Mormyridae. p. 122-184. In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux saumâtres d'Afrique de l'Ouest. tome 1. Faune Trop. 28. Musée Royal de l'Afrique Centrale, Tervuren, and ORSTOM, Paris. (Ref. 2915)

IUCNのレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 29 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless




Human uses

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=0.01445 (0.00819 - 0.02552), b=2.84 (2.69 - 2.99), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.3   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  手段, １．４年～４．４年の倍増期間の最小個体群 (Fec < 1,000).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).