Classification / Names
Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchi (squali e razze) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Potamotrygon: Greek, potamos = river + Greek, trygon = a sting ray (Ref. 45335).
More on author: Castelnau.
Issue
A widespread species that may require subdivision. Rosa (1985a) recognizes Potamotrygon dumerilli (Castelnau 1855) and Potamotrygon humerosus Garman 1913 as distinct species, but evidence given is meager. Larger specimens may weigh close to five kg. Reproductive biology studied by Lasso et al. (1997a) in Venezuela; males achieve sexual maturity at 23 cm DL and females at 18.5 cm DL, and females give birth to up to two pups during any time of year. Food consists of fishes, insects and crustaceans. Additional references: Bertin (1939), Sérét & McEachran (1986), Compagno & Cook (1995), Planquette et al. (1996).
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce benthopelagico; pH range: 6.8 - 7.5. Tropical; 24°C - 26°C (Ref. 12468)
South America: Widespread in Amazon and Orinoco River basins and in river systems in Suriname, Guyana and French Guiana.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 35.0 cm WD maschio/sesso non determinato; (Ref. 27749); 32.5 cm WD (female); peso massimo pubblicato: 1.4 kg (Ref. 27749); peso massimo pubblicato: 1.4 kg
Occurs in stream swamps, floodplain lakes and artificial lagoons. Feeds mainly on insects and benthic crustaceans (Ref. 27749).
Life cycle and mating behavior
Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve
Lasso, C.A., A. Rial B. and O. Lasso-Alcalá., 1997. Notes on the biology of the freshwater stingrays Paratrygon aiereba (Müller & Henle, 1841) and Potamotrygon orbignyi (Castelnau, 1855) (Chondrichthyes: Potamotrygonidae) in the Venezuelan Llanos. aqua, J. Ichthyol. Aquat. Biol. 2(3):39-52. (Ref. 27749)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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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).
Trophic level (Ref.
69278): 3.2 ±0.43 se; based on food items.
Resilienza (Ref.
120179): Molto basso, tempo minimo di raddoppiamento della popolazione più di 14 anni (Assuming Fec <10).
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
