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Mastacembelus frenatus Boulenger, 1901

Longtail spiny eel
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Mastacembelus frenatus
Picture by Seegers, L.


Kenya country information

Common names: Longtail spinyeel, Okunga
Occurrence: native
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from the Lake Victoria drainage (Ref. 52331, 97924). Records from the Athi River (Ref. 4904, 30558, 36900) might refer to this species (Ref. 52331). Most likely there are no mastacembelids in the Tana River despite some records (Ref. 52331).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ke.html
National Fisheries Authority: http://www.recoscix.org/openscrn.htm
Occurrences: Occurrences Point map
Main Ref: Seegers, L., L. De Vos and D.O. Okeyo, 2003
National Database:

Common names from other countries

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Teleostei > 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 居於水底的; pH range: 7.4 - 8.4; dH range: 7 - 30.   熱帶; 23°C - 27°C (Ref. 12468)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Africa: Lake Victoria through Lake Tanganyika and their associated catchment basins to the Upper Zambezi and Okavango Rivers (Ref. 6060). Also in the upper Congo River basin in Democratic Republic of the Congo (Ref. 2970, 45616, 93587) and Zambia (Ref. 246, 27609, 45616), in the Zambezi in Zimbabwe (Ref. 94654) and Angola (Ref. 120641) and in eastward flowing rivers of Tanzania (Ref. 4967, 41366).
非洲: 經過坦噶尼喀湖與他們的相連流域流域到尚比亞三比河上游與奧塔萬戈河的維多利亞湖。

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 80296)

簡短描述 型態特徵 | 形態測量圖

背棘 (總數): 18 - 35; 背的軟條 (總數): 64-73; 臀棘 2; 臀鰭軟條: 67 - 80; 脊椎骨: 95 - 96. Diagnosis: Anterior nostril in the form of a short tentacle; snout produced as a fleshy appendage (Ref. 34290). Number of dorsal-fin spines 18-35; anal fin with 2 separate spines (Ref. 34290, 123814). Colour extremely variable, ground colour brown with a variable reticulated and blotched pattern (Ref. 34290).
前鼻孔形成一個短的觸鬚。 吻延長形成一個肉質的附肢了。 臀鰭有 2根個別的棘。 顏色非常可變, 底色褐色的有一可變的成網狀而且大斑點圖案.(參考文獻 34290)

生物學特性     字彙 (例如 epibenthic)

Mainly riverine species, but also occurs in lakes near river mouths and in vegetated fringes and in swamps (Ref. 80296). Also found in rapids where it hides among rocks (Ref. 85214). Essentially a sedentary fish, nocturnal and usually waiting for its prey to swim or drift within range whereupon fish will dart out of its shelter to seize it (Ref. 89002). Feeds on aquatic insect larvae (Ref. 80296), lithophilic insects (Ref. 12526), fish (Ref. 13624, 27292), shrimps (Ref. 246, 80296), oligochetes and occasionally vegetable matter (Ref. 80296, 89002). Breeds during flood season, in inundated areas (Ref. 80296). Eggs yellow and large, probably spawned among water weeds (Ref. 89002).

出現於沼澤與沿岸淺水區。 (參考文獻 6060) 吃魚與昆蟲。 (參考文獻 13624)

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

非洲: 經過坦噶尼喀湖與他們的相連流域流域到尚比亞三比河上游與奧塔萬戈河的維多利亞湖。

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

Travers, R.A., G. Eynikel and D.F.E. Thys van den Audenaerde, 1986. Mastacembelidae. p. 415-427. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 6060)

IUCN 瀕危狀態 (Ref. 130435)

  無危 (LC) ; Date assessed: 08 December 2015

CITES (Ref. 128078)

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. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00257 (0.00122 - 0.00544), b=2.97 (2.79 - 3.15), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
營養階層 (Ref. 69278):  3.9   ±0.63 se; based on food items.
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.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (39 of 100).
價格種類 (Ref. 80766):   Unknown.