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Leucoraja naevus, Cuckoo ray : fisheries, aquarium
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Leucoraja naevus
Picture by
Greenfield, J.
Elasmobranchii (sharks and rays) >
Rajiformes
(Skates and rays) >
Rajidae
(Skates)
Etymology:
Leucoraja:
Greek, leykos = white + Latin, raja = a fish, Raja sp. (Ref.
45335
)
.
More on authors:
Müller
&
Henle
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 12 - 900 m (Ref.
106604
), usually 20 - 250 m (Ref.
11284
). Subtropical; 63°N - 15°N, 18°W - 36°E
Eastern Atlantic: Kattegat (Ref.
3167
) and North Sea, around Great Britain, Ireland and the Mediterranean to Morocco and Senegal.
Length at first maturity / Size / Weight / Age
Maturity: L
m
57.5
, range 45 - 71.8 cm
Max length : 81.0 cm TL male/unsexed; (Ref.
106604
); 68.0 cm TL (female); common length : 40.0 cm TL male/unsexed; (Ref.
3261
)
Dorsal
spines
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. Snout short; upper surface entirely spinulose, but centre of pectoral fins more or less bare in adults, underside smooth except for prickly front edges; generally 9-13 thorns in a complete row around inner margin of eye, and a large triangle of thorns on nape or shoulder region; two parallel rows of strong thorns on each side of midline along tail; upper surface ochre to light greyish-brown with a large roundish black eye-spot in middle of each pectoral fin, underside white (Ref.
3167
)
Feed on all kinds of bottom animals (Ref.
3167
). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref.
205
). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref.
205
). Egg capsules are 5.0-7.0 cm long and 3.1-3.9 cm wide (Ref.
41250
). Around 70-150 eggs are laid per individual annually (Ref.
41250
).
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref.
50449
). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref.
205
).
McEachran, J.D. and K.A. Dunn
, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref.
27314
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
25 November 2014
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial; aquarium: public aquariums
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 7.2 - 16.7, mean 10.5 °C (based on 1278 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00245 (0.00211 - 0.00285), b=3.22 (3.18 - 3.26), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.3 se; based on diet studies.
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (K=0.11-0.16; tm=8-9; tmax=28; Fec<100).
Prior r = 0.41, 95% CL = 0.26 - 0.65, Based on 1 stock assessment.
Fishing Vulnerability (Ref.
59153
): Moderate to high vulnerability (48 of 100).
Climate Vulnerability (Ref.
125649
): Low to moderate vulnerability (35 of 100).
Price category (Ref.
80766
):
Medium
.
Nutrients (Ref.
124155
): Calcium = 14 [2, 254] mg/100g; Iron = 0.805 [0.076, 9.895] mg/100g; Protein = 16.4 [14.4, 18.5] %; Omega3 = 0.488 [0.206, 1.165] g/100g; Selenium = 28.6 [5.5, 148.2] μg/100g; VitaminA = 8.99 [0.73, 103.53] μg/100g; Zinc = 0.415 [0.024, 4.858] mg/100g (wet weight);
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