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Clupeiformes (Herrings) >
Dorosomatidae (Gizzard shads and sardinellas)
Etymology: Odaxothrissa: Greek, odax, = with the teeth + Greek, thrissa, -es = shad (Ref. 45335); mento: The specific epiteth mento, from the Latin mentum meaning 'chin', is made in allusion of the prominent lower jaw (Ref. 54749).
More on author: Regan.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة محيطي; سمكة نهرية (Ref. 51243). Tropical; 13°N - 2°S
Africa: lower parts of Volta and Niger basins (Ref. 188, 3509, 54749), including Benue River (Ref. 188, 81269); also from Cross River in Nigeria to Wouri River in Cameroon (Ref. 188, 81631). Apparently not in Congo River basin (Ref. 188).
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 14.0 cm SL ذكر/ مختلط الجنس; (Ref. 2246); أعلا وزن تم نشرة: 41.00 g (Ref. 2246)
الأشواك الظهرية (المجموع) : 0; الأشعة الظهرية الناعمة (المجموع) : 15 - 18; شوكة شرجية: 0; أشعه شرجية لينه: 18 - 21; فقرات: 42 - 44. Diagnosis: Body moderate, sometimes deep, its depth 25% of standard length or more; 13-18 pre-pelvic and 8-10 post-pelvic scutes, 1-2 scutes before pectoral fin origin, first pre-pectoral scute as long as, or smaller than, following scutes without ascending arms; lower jaw strongly projecting, with strong canine teeth at symphysis; pre-maxilla with 2-4 strong backward-pointing canine teeth on each side behind outer row of pre-maxillary teeth; lower gillrakers 16-19, shorter than corresponding gill filaments; anal fin with 18-21 rays; silver stripe along flank (Ref. 188, 54749, 81269, 81631). It resembles Odaxothrissa ansorgii, which has more gillrakers, 22-33 vs. 16-19; and Pellonula vorax, which lacks canine teeth in the upper jaw and has longer gillrakers, equal in length to gill filaments vs. shorter (Ref. 188, 54749).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Found in rivers and streams, also in the man-made Lake Volta, but only in the most riverine parts (Ref. 188). It feeds on small fishes, including its own juveniles, and aquatic insects (Ref. 188, 2246). Possibly migrates upstream to breed (Ref. 188). It enters artisanal fisheries, but catches are small (Ref. 188).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Gourène, G. and G.G. Teugels, 1994. Synopsis de la classification et phylogénie des Pellonulinae de l'Afrique Occidentale et Centrale (Teleostei; Clupeidae). J. Afr. Zool. 108(1):77-91. (Ref. 28136)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
مصائد: مصائد تستهلك محلينا
أدوات
تقارير خاصة
تنزيل XML
مصادر علي الأنترنت
تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00832 (0.00493 - 0.01404), b=2.92 (2.77 - 3.07), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
4.3 ±0.75 se; based on food items. |
المرونه (مرجع 120179) |
عالي, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أقل من 15 شهر (Preliminary K or Fecundity.). |
ضعف الصيد (Ref. 59153) |
Low vulnerability (14 of 100). 🛈 |
فئة السعر (Ref. 80766) |
Low.
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