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Xenomystus nigri (Günther, 1868)

African knifefish
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Xenomystus nigri
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Benin country information

Common names: [No common name]
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from the Ouémé River. Also Ref. 3516, 13331.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/bn.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Roberts, T.R., 1992
National Database:

Common names from other countries

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Teleostei > Osteoglossiformes (Bony tongues) > Notopteridae (Featherbacks or knifefishes) > Xenomystinae
Etymology: Xenomystus: Greek, xenos = strange + Greek, mystax = whiskered, used by Belon in 1553 to describe all fishes with whiskers (Ref. 45335).
  More on author: Günther.

Environment: milieu / climate zone / depth range / distribution range 生态学

; 淡水 居于水底的; pH range: 6.0 - 8.0; dH range: 5 - 19.   熱帶; 22°C - 28°C (Ref. 1672)

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Africa: widely distributed in tropical Africa, in the Nile, Chad, Niger, Ogowe and Congo basins (Ref. 7431). Also present in coastal rivers in Sierra Leone, Liberia, Togo, Benin and Cameroon, but not found in Côte d'Ivoire nor Ghana (Ref. 7431).
非洲: 在獅子山,賴比瑞亞,多哥,貝南與喀麥隆的海岸河流域; 也在查德,尼羅河,剛果,尼日 (貝努埃河與尼日三角州), 歐固耶河與剛果 (陶盆 Centrale 與 Ubangui) 流域; 不出現在象牙海岸,迦納也不在尼日河上游中。

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 30.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 31256)

简单描述 检索表 | 型态特徵 | 形态测量图

背棘 (总数) : 0; 臀棘: 0; 臀鳍软条: 108 - 130. Body height 5-5.4 x SL, head length 6.9-7.5 x SL, snout smaller than eye, eye diameter 3.8-4.5 x head length, maxilla extends to vertical of eye center or just under the eye's posterior border, ventral spines 25-32
身体高度 5-5.4 x SL, 头长 6.9-7.5 x SL, 吻比眼更小, 眼直径 3.8-4.5个 x 头长, 颚骨延伸到垂直的眼中心或靠近眼的后缘下面, 腹面棘 25-32

生物学特性     字汇 (例如 epibenthic)

Obligate air-breathing (Ref. 126274); Prefers quiet waters with vegetation. Females lay 150-200 eggs of 2 mm diameter (Ref. 1672). Can produce barking sounds. Comes to the surface from time to time to swallow air. Feeds at dusk and during the night on worms, crustaceans, insects and snails (Ref. 7020).

偏爱有植物生长的安静水域。 雌性生下 2 mm 直径的 150-200个卵。 (参考文献 1672) 能发出吠声。 时常来到表面吞空气。 吃在薄暮而且夜晚时捕食蠕虫, 甲壳动物,昆虫与蜗牛.(参考文献 7020)

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

非洲: 在獅子山,賴比瑞亞,多哥,貝南與喀麥隆的海岸河流域; 也在查德,尼羅河,剛果,尼日 (貝努埃河與尼日三角州), 歐固耶河與剛果 (陶盆 Centrale 與 Ubangui) 流域; 不出現在象牙海岸,迦納也不在尼日河上游中。

主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Roberts, T.R., 1992. Systematic revision of the old world freshwater fish family Notopteridae. Ichthyol. Explor. Freshwat. 2(4):361-383. (Ref. 7431)

世界自然保护联盟红皮书 (Ref. 130435)

  最不相关 (LC) ; Date assessed: 05 June 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

  无害处的




人类利用

渔业: 没有兴趣; 水族馆: 商业性
FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 1.0010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00318 - 0.02175), b=2.99 (2.77 - 3.21), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
营养阶层 (Ref. 69278):  3.3   ±0.44 se; based on food items.
回复力 (Ref. 120179):  高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (27 of 100).