Issue
Records of Tana and Athi systems are dubious and probably refer to different species; status of North Ewaso Nyiro populations uncertain and needs further study (Ref. 52331).
Environment: milieu / climate zone / تغييرات عمق / distribution range
بوم شناسي
; آب شيرين نزديك كف زي; تغييرات عمق 0 - 70 m (Ref. 34291), usually 0 - 50 m (Ref. 34291). Tropical; 22°C - 26°C (Ref. 2059)
Africa: known from Lower Nile up to Lake Victoria basin (Ref. 1878), including Baro system in Ethiopia (Ref. 54860). Present in Lakes Victoria, Kyoga, Albert, Edward and George, the Victoria and Murchison Nile (Ref. 34290), and Middle Akagera system (Ref. 46152). Also known from Lake Turkana basin and Northern Ewaso Nyiro (Ref. 52331).
Size / Weight / سن
بلوغ: Lm ? range ? - ? cm
Max length : 100.0 cm SL جنس نر / بدون خواص جنسي; (Ref. 34290); common length : 60.0 cm SL جنس نر / بدون خواص جنسي; (Ref. 34290)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
خارهاي باله پشتي (کل) : 0; شعاع نرم باله پشتي (کل) : 55 - 75; خارهاي باله مخرجي: 0; شعاع نرم باله مخرجي: 17 - 22. Diagnosis: snout long, about equal to the post-ocular length of the head (Ref. 28714), produced into a stout trunk whose thickness and angle to the face are variable (Ref. 34290). Dorsal fin very long, more than twice the anal fin length, with less than 75 rays, its origin above or slightly in front of the insertion of the pelvic fins (Ref. 4903, 28714).
Body shape (shape guide): fusiform / normal.
Solitary, nocturnal species (Ref. 28714). In Lake Victoria in both coastal and offshore waters (Ref. 4903). May spawn in the main lake, perhaps in deep water over rocks (Ref. 52083). In Lake Kyoga in open water rather than weedy areas (Ref. 55624). Bottom feeder; small fishes eat lithophilic insects; adults almost exclusively insectivorous; chironomids dominate in the diet (Ref. 12526). Oviparous (Ref. 205).
Life cycle and mating behavior
بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)
Gosse, J.-P., 1984. Mormyridae. p. 63-122. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ORSTOM, Paris and MRAC, Tervuren. Vol. 1. (Ref. 3203)
وضعيت در فهرست قرمز IUCN (Ref. 130435: Version 2024-2)
خطر برای انسان ها
Harmless
استفاده انسانی
ماهي گيري – شيلات: تجاري; آكواريوم: تجاري
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Phylogenetic diversity index (مرجع
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00686 - 0.01674), b=2.90 (2.77 - 3.03), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245).
Trophic level (مرجع
69278): 3.2 ±0.40 se; based on food items.
Generation time: 7.8 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
جهندگی (مرجع
120179): متوسط, كمينه زمان لازم براي دو برابر شدن جمعيت 4/1 – 4/4 سال (Fec = 1,393).
Fishing Vulnerability (Ref.
59153): High vulnerability (59 of 100).
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