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Urotrygon microphthalmum, Smalleyed round stingray
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Smalleyed round stingray
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Urotrygon microphthalmum
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Elasmobranchii (sharks and rays) >
Myliobatiformes
(Stingrays) >
Urotrygonidae
(American round stingrays)
Etymology:
Urotrygon:
Greek, oura = tail + Greek, trygon = a sting ray (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 9 - 55 m (Ref.
58018
). Tropical
Western Atlantic: Venezuela and the mouth of the Amazon.
Length at first maturity / Size / Weight / Age
Maturity: L
m
19.9
, range 17 - ? cm
Max length : 11.8 cm WD male/unsexed; (Ref.
13608
)
Short description
Morphology
|
Morphometrics
Long and pointed snout. Disc angular in front and naked. Tail longer, pectorals are angular and caudal fin narrower. Upper surface gray and lower surface whitish (Ref.
6902
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Uyeno, T., K. Matsuura and E. Fujii (eds.)
, 1983. Fishes trawled off Suriname and French Guiana. Japan Marine Fishery Resource Research Center, Tokyo, Japan. 519 p. (Ref.
13608
)
IUCN Red List Status (Ref.
130435
)
Critically Endangered (CR)
(A2d); Date assessed:
01 July 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 26.7 - 28.1, mean 27.5 °C (based on 62 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00575 - 0.03468), b=3.07 (2.86 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.7 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (26 of 100).
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mrius-barile
- 20 July 2016
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