分類 / 名前
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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).
Eponymy: This is a toponym referring to the River Niger; the river (or its mouth, in the case of marine species) being the type locality. (Ref. 128868), visit book page.
More on author: Günther.
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; pH range: 6.0 - 8.0; dH range: 5 - 19. Tropical; 22°C - 28°C (Ref. 1672)
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).
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 30.0 cm SL オス/雌雄の選別がない; (Ref. 31256)
背面の脊椎 (合計) : 0; 肛門の骨: 0; 臀鰭: 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
Body shape (shape guide): fusiform / normal; Cross section: compressed.
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).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Roberts, T.R., 1992. Systematic revision of the old world freshwater fish family Notopteridae. Ichthyol. Explor. Freshwat. 2(4):361-383. (Ref. 7431)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない; 水族館・水槽: 商業
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): PD
50 = 1.0010 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00832 (0.00317 - 0.02185), b=2.99 (2.77 - 3.21), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.3 ±0.44 se; based on food items.
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 to moderate vulnerability (27 of 100).
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