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Cypriniformes (Carps) >
Danionidae (Danios) > Rasborinae
Etymology: Rasbora: Rasbora, an Indian word for a fish, also used in Malay peninsula; truncata: The specific name, truncata, from the Latin referring to the truncated lateral line system in this species, which has an incomplete lateral line and also has a truncated cephalic line.
البيئة: الوسط / المنطقة المناخية / نطاق العمق / نطاق التوزيع
البيئة
; المياه العذبة قاعية التغذية و المعيشة. Tropical
Asia: Alas River in northwestern Sumatra, Indonesia.
الحجم / وزن / العمر
النضج: Lm ?  range ? - ? cm
Max length : 3.8 cm SL ذكر/ مختلط الجنس; (Ref. 85846)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
الأشعة الظهرية الناعمة (المجموع) : 9; أشعه شرجية لينه: 7; فقرات: 31 - 32. Distinguished from all members of Rasbora trifasciata-group by a weakly developed post-opercular streak, which extends ventrally to the horizontal through the ventral margin of pupil (vs. distinct streak, which extends ventrally to reach the axillary lobe of pectoral fin). Can be further diagnosed from other members in northwestern Sumatra by the following combination of characters: male cephalic tubercles conical, distinctly pointed, with a shallow, wide depression basally; presence of cranial superficial neuromasts (each basal plate is lower than the skin surface and surrounded by peripheral ridge and groove, respectively); the first infraorbital (lachrymal) with a relatively straight dorsal margin, but without a posterodorsal process; the lachrymal region peripherally pigmented with an unpigmented central area; absence of dorsomedial branch of supraorbital canal toward posterior margin of frontal; an axial streak extending forward and terminating at the area between vertical through the dorsal-fin origin and the pelvic-fin insertion; the cephalic tubercles present only in males; a transverse scale count anterior to the dorsal-fin origin and pelvic-fin insertion of K4/1/2K; 12 circumpeduncular scales; an immaculate opercular flap; a basal reticulation pattern comprised of a network of well-developed parenthesis-shaped bars on the midlateral surface of the body; a maximum vertical coverage of the basal reticulation two and a half longitudinal scale rows; the lateral line absent from one to six posterior scales (only 20-26 scales perforated); lateral line series unpigmented on the posterior portion; and the pelvic-fin rays i,7 (Ref. 94947).
This species mostly inhabits moderate-flowing turbid rivers. In streams with fast-flowing water, it tends to form school at the stream margins or the pool regions along the river banks. It occurs sympatrically with Rasbora api and R. cf. sumatrana (Ref. 94947).
دورة الحياة وسلوك التزاوج
النضج | التكاثر | وضع البيض | بيض | الخصوبة | اليرقات
Lumbantobing, D.N., 2010. Four new species of the Rasbora trifasciata-group (Teleostei: Cyprinidae) from northwestern Sumatra, Indonesia. Copeia 2010(4):644-670. (Ref. 85846)
حالة القائمة الحمراء للاتحاد الدولي لحفظ الطبيعة والموارد الطبيعية (Ref. 130435: Version 2025-2 (Global))
استخدامات بشرية
مصائد: فوائد محتملة
أدوات
تقارير خاصة
تنزيل XML
مصادر علي الأنترنت
تقديرات تستند إلى النماذج
مؤشر التنوع الشُعبي الوراثي (مرجع 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00708 (0.00295 - 0.01699), b=3.08 (2.89 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
مستوى غذائي (مرجع 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
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 (10 of 100). 🛈 |