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Mastacembelus nigromarginatus Boulenger, 1898

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

> Synbranchiformes (Spiny eels) > Mastacembelidae (Spiny eels)
Etymology: Mastacembelus: Greek, mastax, -agos = bite + Greek, emballo = to throw oneself (Ref. 45335).
More on author: Boulenger.

Environment: milieu / climate zone / 深さの範囲 / distribution range 生態学

; 新鮮な水 底生の漂泳性; potamodromous (Ref. 51243). Tropical

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | 目的のマップ | 導入 | Faunafri

Africa: coastal river basins from the Cess/Nipoué as western distribution border and certainly up to the Volta and questionably up to the Niger River basin as eastern distribution border (Ref. 57415).

Length at first maturity / サイズ / 重さ / 年齢

成熟: Lm 15.0  range ? - ? cm
Max length : 42.2 cm SL オス/雌雄の選別がない; (Ref. 57415)

簡単な記述 検索表 | 形態学 | 形態計測学

背面の脊椎 (合計) : 28 - 32; 背鰭 (合計) : 82 - 104; 臀鰭: 75 - 94; 脊つい: 91 - 98. Diagnosis: no pre-opercular spines; 27+1 up to 31+1 (median 29+1) dorsal spines; distance from anterior border of snout to last externally visible dorsal spine 49.7-57.6% SL (m=54.2), increasing with size; distance from posterior edge of pectoral fin to anterior origin of 1st dorsal spine between (-21.7) and 0.0% HL [m = -11.8]; pre-orbital spine as good as always present; snout with a more pointed appearance; origin of 1st dorsal spine situated anterior to, or below, posterior edge of pectoral fin; distance from anterior border of snout to last externally visible dorsal spine 50.0-57.6% SL (m=54.1), shorter than distance from anterior border of snout to last externally visible anal spine, 54.2-62% SL (m=58.3), both decreasing in percentages with increasing size; post-anal length 43.5-51.0% SL (m=46.3) increasing with size, shorter than pre-anal length, 48.3-55.1% SL (m=52.5) and decreasing with size, becoming equal to latter with increasing size; 9-12 caudal fin rays; 4-6 predorsal vertebrae; 35-40 abdominal vertebrae; (+4)-(+5) in-between vertebrae; 53-60 caudal vertebrae (Ref. 57415). Coloration: light brown overall background colour; lateral sides characterized by a more or less pronounced dark brown battlement pattern, which forms a well delimited edge between dark lateral sides and lighter colour dorsal sides and dorsal midline; nevertheless, dorsal midline often with a series of dark brown saddle-like blotches; ventral side of head, belly and abdomen white, yellowish of colour but not so well delimited from lower sides; lower sides with irregularly shaped, white, yellowish spots; background colour of dorsal caudal and anal fins white, transparent, mottled scarcely with small, round, brown spots; dorsal and anal fin base with a series of dark brown, round spots partially situated, respectively, on dorsal and ventral part of tail; often those spots not independent but connected with dark brown-coloured tail and can even be interpreted as an enlargement of tail colour pattern on basal part of fins; on the more distal part of dorsal and anal fins additional small dark brown spots can be observed; pectoral fins white, yellowish of overall background colour with small light brown spots and a brown base; colour pattern changes with size, especially darkening of unpaired fins; nevertheless, outermost margin of dorsal, caudal and anal fins always remains white; in addition, small dark brown spots situated on more distal part of median fins, gradually with increasing size, form a continuous broad, black band on these fins; on anal fin this band is often connected with ventral side of tail due to an enlargement of the spots situated on base of fin resulting in a series of yellowish, white spots on base of anal fin; on dorsal fin both remain separate; upper edge of lateral dark brown band with its battlement pattern becomes less contrasted or may even disappear (Ref. 57415).
Body shape (shape guide): eel-like.

生物学     用語集 (例 epibenthic)

Maximum reported TL was 443mm (Ref. 57415).

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

Vreven, E.J., 2003. Mastacembelidae. p. 708-737 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57415)

IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)

  軽度懸念 (LC) ; Date assessed: 30 November 2019

CITES

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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用具

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インターネットの情報源

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Estimates based on models

Phylogenetic diversity index (参照 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00363 (0.00210 - 0.00627), b=2.96 (2.81 - 3.11), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
栄養段階 (参照 69278):  3.9   ±0.6 se; based on size and trophs of closest relatives
回復力 (参照 120179):  手段, １．４年～４．４年の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (41 of 100). 🛈