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Okamejei arafurensis, Arafura skate
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Arafura skate
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drawing shows typical species in Rajidae.
Elasmobranchii (sharks and rays) >
Rajiformes
(Skates and rays) >
Rajidae
(Skates)
Etymology:
arafurensis:
Named for its distributional area, Arafura Sea.
.
More on authors:
Last
&
Gledhill
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 179 - 298 m (Ref.
75645
). Tropical; 8°S - 15°S, 120°E - 133°E (Ref.
114953
)
Eastern Indian Ocean: off northwestern Australia (Ref.
114953
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 40.7 cm TL male/unsexed; (Ref.
75645
); 49.5 cm TL (female)
Found on outer continental shelf and upper slope (Ref.
114953
). Length of one adolescent male 29.9 cm TL; males mature at 37.6-40.7 cm TL; smallest juvenile at 23.5 cm TL (Ref.
75645
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Last, P.R. and D.C. Gledhill
, 2008. Two new skates of the genus
Okamejei
(Rajoidei: Rajiidae) from south-east Indian Ocean. In Last. P.R., W.T. White, J.J. Pogonoski and D.C. Gledhill (eds) : Descriptions of new Australian skates (Batoidea: Rajoidei) pg. 119-134. CSIRO marine and atmospheric research paper no. 021. (Ref.
75645
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
28 April 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 11.7 - 16.5, mean 14.2 °C (based on 12 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5001 [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
): 4.0 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (40 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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