Klassifizierung / Names
Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (Haie und Rochen) (sharks and rays) >
Myliobatiformes (Stingrays) >
Potamotrygonidae (River stingrays) > Potamotrygoninae
Etymology: Plesiotrygon: Greek, plesios = near + Greek, trygon = a sting ray (Ref. 45335); iwamae: Named in honor of the late Brazilian zoologist Satoko Iwama (Ref. 34195).
Issue
Food items consist of fishes (e.g. catfishes), insects, crustaceans and nematodes (Rosa et al., 1987). Nothing is known of its reproductive biology, but pups are free-swimming at least by 12 cm DL. Recent references: Barriga (1991), Wilkens & Dohse (1993), Compagno & Cook (1995), Lovejoy (1996).
Environment: milieu / climate zone / depth range / distribution range
Ökologie
; süßwasser demersal. Tropical
South America: Upper to lower Amazon River basin, from Ecuador to Belém, Brazil, in the Napo, Solimões, Amazonas and Pará rivers.
Size / Gewicht / Alter
Maturity: Lm ?  range ? - ? cm
Max length : 58.0 cm WD Männchen/unbestimmt; (Ref. 34195)
Feeds on small catfishes, insects, decapod crustaceans, and parasitic cestodes and nematodes (Ref. 34195).
Life cycle and mating behavior
Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven
Rosa, R.S., H.P. Castello and T.B. Thorson, 1987. Plesiotrygon iwamae, a new genus and species of neotropical freshwater stingray (Chondrichthyes: Potamotrygonidae). Copeia 1987(2):447-458. (Ref. 34195)
IUCN Rote Liste Status (Ref. 130435)
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
Zusatzinformationen
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Internet Quellen
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [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): 3.4 ±0.46 se; based on food items.
Widerstandsfähigkeit (Ref.
120179): sehr niedrig, Verdopplung der Population dauert mehr als 14 Jahre. (Assuming Fec<10).
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).