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Characiformes (Characins) >
Distichodontidae (Distichodus)
Etymology: Nannocharax: Latin, nannus = small + Greek, charax = a marine fish without identification (Ref. 45335); rubrolabiatus: From the Latin ruber (red) and labium (lip) after its bright red colored lips (Ref.26632).
Environment: milieu / climate zone / نطاق العمق / distribution range
البيئة
; المياه العذبة محيطي. Tropical; 23°C - 25°C; 8°N - 4°S
Africa: Lower Guinea endemic, only known from the Sanaga River basin, Cameroon (Ref. 26632, 81638).
الحجم / وزن / العمر
النضج: Lm ? range ? - ? cm
Max length : 6.1 cm SL ذكر/ مختلط الجنس; (Ref. 81638)
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 12 - 14; شوكة شرجية: 0; أشعه شرجية لينه: 9 - 10; فقرات: 37. Diagnosis: 50-53 (Ref. 81638) or 46 (Ref. 26632) scales in lateral line. 6-7 anal fin branched rays; dorsal portions of body with distinct dark, vertically oriented dark marks that form saddle-shaped pigmentation pattern; prominent horizontally elongate, dark spots on mid-lateral surface of body (Ref. 81638).
Body shape (shape guide): elongated; Cross section: compressed.
Found under rocks, in riffles of moderately large rivers (30-50m) in the savannah zone, in areas where there is a strong current (>1m/sec); in all sites where collection took place, there was a rather restricted gallery of shrubs and small trees on the river banks; water was greenish with a transparency of about 50 cm, neutral pH (6.5-7.5), with a high content of dissolved oxygen (6.5-7.5 mg/l) and a rather low conductivity (35-45 µS/cm); water temperatures were between 23 and 25 °C at noon (Ref. 26632).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
Van den Bergh, E.C., G.G. Teugels, E.J. Coenen and F. Ollevier, 1995. Nannocharax rubrolabiatus, a new species of distichodont fish from the Sanaga River Basin in Cameroon, Africa (Teleostei: Distichodontidae). Ichthyol. Explor. Freshwat. 6(4):349-356. (Ref. 26632)
IUCN Red List Status (Ref. 130435: Version 2024-2)
استخدامات بشرية
مصائد: فوائد محتملة
أدوات
تقارير خاصة
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مصادر علي الأنترنت
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=0.00447 (0.00189 - 0.01058), b=3.17 (2.96 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
مستوى غذائي (مرجع
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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