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Breviraja spinosa, Spinose skate
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Breviraja spinosa
Male picture by
JAMARC
Elasmobranchii (sharks and rays) >
Rajiformes
(Skates and rays) >
Rajidae
(Skates)
Etymology:
Breviraja:
Latin, brevis = short, brief + Latin raja = ray (Raja sp.) (Ref.
45335
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 323 - 675 m (Ref.
13608
). Deep-water; 25°N - 35°N, 81°W - 77°W (Ref.
114953
)
Western Central Atlantic: South Carolina to Florida, USA (Ref.
114953
). Gulf of Mexico to Nicaragua and off Suriname.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 23.6 cm WD male/unsexed; (Ref.
13608
)
Short description
Morphology
|
Morphometrics
Irregular rows of thorns along the midbelt of disc. First and second dorsal fins are confluent. Upper surface light brown with a few whitish blotches. Lower surface plain whitish (Ref.
6902
).
Deep water species (Ref.
6902
). Oviparous (Ref.
50449
). Eggs have horn-like projections on the shell (Ref.
205
). Males reaches maturity at ca. 25 cm TL, females at ca. 29 cm TL; size at birth unknown (Ref.
114953
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref.
50449
). Eggs have horn-like projections on the shell (Ref.
205
).
Last, P.R., S. Weigmann and L. Yang
, 2016. Changes to the nomenclature of the skates (Chondrichthyes: Rajiformes). In: Last and Yearsley (eds.). Rays of the World: Supplementary Information. CSIRO Special Publication. 11-34. (Ref.
118749
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
19 June 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 4.7 - 16.1, mean 11.4 °C (based on 56 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), 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 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (28 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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