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Rhinoptera brasiliensis, Brazilian cownose ray : fisheries
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Rhinoptera brasiliensis
Male picture by
Carvalho Filho, A.
Elasmobranchii (sharks and rays) >
Myliobatiformes
(Stingrays) >
Rhinopteridae
(Cownose rays)
Etymology:
Rhinoptera:
Greek, rhinos = nose + Greek,pteron = fin, wing (Ref.
45335
)
.
More on author:
Müller
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 20 m (Ref.
114953
). Tropical; 30°N - 37°S, 105°W - 33°W (Ref.
114953
)
Western Atlanitc: from the Gulf of Mexico to southern Brazil.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - 78 cm
Max length : 104 cm WD male/unsexed; (Ref.
114953
); common length : 90.0 cm WD male/unsexed; (Ref.
6077
)
Short description
Morphology
|
Morphometrics
Median row of teeth is wider transversely to their lengths. Upper jaw has 9 series of teeth. Brown above, brownish white below. Darker towards the tips of the pectorals (Ref.
6902
).
A benthopelagic species found inshore over sandy bottoms from nearshore to about 20 m depth. Feeds mainly on molluscs (Ref.
114953
). Ovoviviparous (Ref.
50449
). Pups 38-48 cm disc width at birth (Ref.
114953
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref.
50449
).
Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor
, 2016. Rays of the world. CSIRO Publishing, Comstock Publishing Associates. i-ix + 1-790. (Ref.
114953
)
IUCN Red List Status (Ref.
130435
)
Vulnerable (VU)
(A2bd); Date assessed:
21 June 2019
CITES
Not Evaluated
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
= 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00463 - 0.02844), b=2.98 (2.76 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.6 ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153
): Very high vulnerability (85 of 100).
Price category (Ref.
80766
):
Medium
.
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- 20 July 2016
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