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Deania calceus, Birdbeak dogfish : fisheries
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Deania calceus
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Gomez, R.
Elasmobranchii (sharks and rays) >
Squaliformes
(Sleeper and dogfish sharks) >
Centrophoridae
(Gulper sharks)
Etymology:
Deania:
-ia
(Gr.), belonging to: American ichthyologist Bashford Dean (1867-1928), American Museum of Natural History, for his research on selachian fishes. (
See ETYFish
)
;
calceus:
Latin for shoe, from the Portuguese vernacular
sapata
for this and other squaliform sharks, e.g.,
Centroselachus crepidater
, Somniosidae; also known as
sapata branca
, white shoe, allusion not explained, perhaps referring to how its gray-white body with a long snout resembles a velvet slipper [often misspelled
calcea
]. (
See ETYFish
)
.
More on author:
Lowe
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 60 - 1490 m (Ref.
26346
), usually 400 - 1400 m (Ref.
10717
). Deep-water; 70°N - 56°S, 180°W - 180°E
East Atlantic: Iceland to South Africa. Indian Ocean: South Africa, southern Madagascar, southern Australia. Pacific Ocean: Indonesia, Japan, Taiwan, southeast Australia, New Zealand, and Peru to Chile.
Length at first maturity / Size / Weight / Age
Maturity: L
m
97.8
, range 70 - 111 cm
Max length : 127 cm TL male/unsexed; (Ref.
122636
); max. published weight: 8.7 kg (Ref.
122636
)
Dorsal
spines
(total): 2;
Dorsal
soft rays
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. A longnose dogfish with a long, 1st dorsal fin and no subcaudal keel (Ref.
5578
). Grey-brownish in color (Ref.
6577
).
Found on the outer continental and insular shelves and upper slopes (Ref.
247
). Usually on or near the bottom but sometimes found well above it (Ref.
5578
). Apparently in large schools (Ref.
5578
). Feeds on pelagic bony fish, squid, octopus and shrimp (Ref.
5578
). Ovoviviparous (Ref.
50449
). Caught very rarely by demersal longline fisheries operating in deepwater of Indonesia. Utilized for its meat, fins (low value) and liver oil (very high value) (Ref.
58048
).
Ovoviviparous, embryos feed solely on yolk (Ref.
50449
). Young possibly number 6 to 12 in a litter, as these were the number of fertilized eggs found in the uteri of some specimens (Ref.
247
). Size at birth 29 to 34 cm (Ref.
26346
). 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
)
Near Threatened (NT)
(A2bd); Date assessed:
21 November 2019
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
): 0.3 - 9.6, mean 5.1 °C (based on 991 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00209 (0.00103 - 0.00422), b=3.15 (2.97 - 3.33), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245
).
Trophic level (Ref.
69278
): 4.3 ±0.4 se; based on diet studies.
Generation time: 14.3 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (K=0.077-0.135; Fec=6-12; tm=25).
Fishing Vulnerability (Ref.
59153
): High to very high vulnerability (66 of 100).
Climate Vulnerability (Ref.
125649
): High vulnerability (62 of 100).
Price category (Ref.
80766
):
Medium
.
Nutrients (Ref.
124155
): Calcium = 6.67 [1.36, 34.84] mg/100g; Iron = 0.319 [0.075, 1.026] mg/100g; Protein = 20.9 [17.9, 23.1] %; Omega3 = 0.303 [0.112, 0.975] g/100g; Selenium = 17.8 [5.4, 52.0] μg/100g; VitaminA = 9.83 [2.22, 44.15] μg/100g; Zinc = 0.249 [0.120, 0.471] mg/100g (wet weight); based on
nutrient studies.
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