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Dalatias licha, Kitefin shark : fisheries
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Dalatias licha
Male picture by
Cambraia Duarte, P.M.N. (c)ImagDOP
Elasmobranchii (sharks and rays) >
Squaliformes
(Sleeper and dogfish sharks) >
Dalatiidae
(Sleeper sharks)
Etymology:
Dalatias:
Etymology not explained nor evident. A few online sources suggest
Dalatias
is derived from
dalos
(Gr.), torch or firebrand, but nothing in Rafinesque’s description supports this interpretation. Interestingly,
D. licha
is bioluminescent, a fact that was discovered and resported only recently and was certainly unknown to Rafinesque and other early naturalists. See: Mallefet J., D. W. Stevens, and L. Duchatelet. 2021. Bioluminescence of the largest luminous vertebrate, the kitefin shark,
Dalatias licha
: first insights and comparative aspects. Frontiers in Marine Science 8 (article 633582): 1-13. (
See ETYFish
)
;
licha:
Latinization of “La Liche” as reported by Broussonet (1780), an old French word for this shark, possibly from from the Occitan
lecha
or
lec
, meaning “glutton”. (
See ETYFish
)
.
More on author:
Bonnaterre
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 37 - 1800 m (Ref.
247
), usually 300 - 600 m (Ref.
247
). Deep-water; 72°N - 56°S, 98°W - 153°W
Western Atlantic: Georges Bank and northern Gulf of Mexico. Eastern Atlantic: Iceland (Ref.
12462
), Scotland, and Irish Atlantic slope to Morocco, western Mediterranean, Madeira to Cameroon. Western Indian Ocean: Mozambique and South Africa. Western Pacific: Japan, Australia, and New Zealand. Central Pacific: Hawaii.
Length at first maturity / Size / Weight / Age
Maturity: L
m
139.0
, range 117 - 159 cm
Max length : 182 cm TL male/unsexed; (Ref.
10717
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. Moderately sized, short- and blunt-snouted shark with two almost equal-sized dorsal fins; papillose thick lips; small slender-cusped upper teeth and very large lower teeth with erect triangular serrated cusps and distal blades; first dorsal fin on back with its origin behind the pectoral rear tips and its base closer to the pectoral base than the pelvic fins; and caudal fin with the ventral lobe not expanded (Ref.
247
). Dark grey-brown to black; trailing edges of fins translucent (Ref.
26346
).
Found on outer continental and insular shelves and slopes (Ref.
247
). Mainly found on or near the bottom but readily occurs well off the substrate (Ref.
247
,
58302
). Often pelagic (Ref.
58302
). Found singly or in small schools (Ref.
6871
). Feeds mainly on deepwater bony fish, but also skates, other sharks (etmopterids in Ref.
123656
), cephalopods and crustaceans (Ref.
5578
). This bioluminescent shark (currently the largest luminous vertebrate) emit light ventrally to counterilluminate which might be used to illuminate the ocean floor while searching/hunting for prey; or to stealthily approach prey, using counterillumination camouflage, before striking fast when it is close enough (Ref.
123656
). Ovoviviparous (Ref.
205
), with 10-20 young born at 30-42 cm (Ref.
26346
). Used for its squalene liver oil, leather and meat, as well as for fishmeal (Ref.
6871
).
Ovoviviparous (Ref.
247
). 10-20 young born at 30-42 cm (Ref.
26346
); 10-16 young born at 30 cm TL (Ref.58048). Distinct pairing with embrace (Ref.
205
).
Compagno, L.J.V.
, 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref.
247
)
IUCN Red List Status (Ref.
130435
)
Vulnerable (VU)
(A2bd+3d); Date assessed:
03 July 2017
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 2.5 - 14.3, mean 5.3 °C (based on 3093 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00141 - 0.00976), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.4 se; based on diet studies.
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Fec=10-20).
Prior r = 0.27, 95% CL = 0.15 - 0.48, Based on 1 stock assessment.
Fishing Vulnerability (Ref.
59153
): High to very high vulnerability (65 of 100).
Climate Vulnerability (Ref.
125649
): Moderate vulnerability (38 of 100).
Price category (Ref.
80766
):
Medium
.
Nutrients (Ref.
124155
): Calcium = 6.01 [1.29, 31.29] mg/100g; Iron = 0.325 [0.075, 1.053] mg/100g; Protein = 19.3 [17.4, 21.2] %; Omega3 = 0.303 [0.107, 0.998] g/100g; Selenium = 21.6 [5.9, 65.2] μg/100g; VitaminA = 6.5 [1.4, 30.4] μg/100g; Zinc = 0.214 [0.104, 0.400] mg/100g (wet weight);
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