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Potamotrygon scobina, Raspy river stingray : fisheries
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Potamotrygon scobina
Picture by
Crepaldi, D.V.
Classification / Names
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,
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ITIS
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Cloffa
Elasmobranchii (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
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; potamodromous (Ref.
51243
). Tropical
South America: Middle and lower Amazon River, lower Tocantins River, Pará River, Trombetas River in Brazil.
Length at first maturity / Size / Weight / Age
Maturity: L
m
39.0
  range ? - ? cm
Max length : 54.7 cm WD male/unsexed; (Ref.
94972
); max. published weight: 15.0 kg (Ref.
27548
)
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
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
)
Data deficient (DD)
; Date assessed:
30 April 2004
CITES
Appendix III:
International trade cooperation
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial
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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 ±0.4 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.
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (Assuming Fec. <10; tm=1.8; K=0.3 (in captivity).).
Fishing Vulnerability (Ref.
59153
): High vulnerability (58 of 100).
Price category (Ref.
80766
):
Medium
.
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