Mastacembelus nigromarginatus : fisheries

Mastacembelus nigromarginatus Boulenger 1898

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Mastacembelus nigromarginatus
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分類 / Names 俗名 | 同種異名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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

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

; 淡水 底中水層性; 河川洄游 (Ref. 51243).   熱帶

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | 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).
非洲: 向東的卡瓦利河在奈及利亞與馬利的到佛塔河 (參考文獻 6060) 與尼日河上游河流域.(參考文獻 7394)

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm 15.0  range ? - ? cm
Max length : 42.2 cm SL 雄魚/尚未辨別雌雄; (Ref. 57415)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 28 - 32; 背的軟條 (總數): 82-104; 臀鰭軟條: 75 - 94; 脊椎骨: 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).

生物學特性     字彙 (例如 epibenthic)

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

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

非洲: 向東的卡瓦利河在奈及利亞與馬利的到佛塔河 (參考文獻 6060) 與尼日河上游河流域.(參考文獻 7394)

主要參考資料 Upload your references | 參考文獻 | 合作者 | 合作者

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 瀕危狀態 (Ref. 123251)

  無危 (LC) ; Date assessed: 30 April 2006

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00222 - 0.00681), b=2.94 (2.78 - 3.10), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
營養階層 (Ref. 69278):  3.9   ±0.6 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
瀕危性 (Ref. 59153):  Moderate vulnerability (43 of 100) .
價格種類 (Ref. 80766):   Unknown.