أشلاق (القروش و الشفانين) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335).
More on author: Garman.
Issue
Nothing is known about its reproductive biology. Additional references: Hartel & Dingerkus (1997), Ferreira et al. (1998), Compagno & Cook (1995).
Environment: milieu / climate zone / depth range / distribution range
البيئة
; المياه العذبة قاعية التغذية و المعيشة; سمكة نهرية (Ref. 51243). Tropical
South America: Middle and lower Amazon River, lower Tocantins River, Pará River, Trombetas River in Brazil.
Length at first maturity / الحجم / وزن / العمر
Maturity: Lm 39.0  range ? - ? cm
Max length : 54.7 cm WD ذكر/ مختلط الجنس; (Ref. 94972); أعلا وزن تم نشرة: 15.0 kg (Ref. 27548)
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Fecundity: 1-4 pups; gestation takes 3-4 months (Ref. 52199).
de Carvalho, M.R., N. Lovejoy and R.S. Rosa, 2003. Potamotrygonidae (River stingrays). p. 22-28. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36687)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
مصائد: غير مهمة تجارياً
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Generation time: 3.7 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
المرونه (Ref.
120179): منخفظ جدا, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع أكثر من 14 سنة (Assuming Fec. <10; tm=1.8; K=0.3 (in captivity).).
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).