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Paragaleus tengi, Straight-tooth weasel shark : fisheries
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Straight-tooth weasel shark
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Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Hemigaleidae
(Weasel sharks)
Etymology:
Paragaleus:
para
(Gr.), near, referring to how its dentition is intermediate between
Hemigaleus
and the triakid
Eugaleus
(=
Galeorhinus
). (
See ETYFish
)
;
tengi:
In honor of Teng Huo-Tu (1911-1978), Director, Taiwan Fisheries Research Institute, and authority on Taiwanese elasmobranch fishes. (
See ETYFish
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal. Tropical; 34°N - 15°N
Western Pacific: Japan to Viet Nam, including Hong Kong and Taiwan. Report of a record from off Madagascar may be an undescribed
Paragaleus
which has just recently been collected.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 88.0 cm TL male/unsexed; (Ref.
244
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. Grey or grey-brown above, light below; no prominent markings on body and fins (Ref.
13567
).
A little-known inshore shark (Ref.
13567
). Viviparous (Ref.
50449
). Taken in fisheries where it occurs (Ref.
13567
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Viviparous, placental (Ref.
50449
). 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 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref.
244
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(A2d); Date assessed:
06 May 2020
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless (Ref.
13567
)
Human uses
Fisheries: minor commercial
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 21.5 - 26.9, mean 24.7 °C (based on 164 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5664 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00363 (0.00147 - 0.00899), b=3.07 (2.86 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (Fec is assumed to be <10).
Fishing Vulnerability (Ref.
59153
): High vulnerability (55 of 100).
Price category (Ref.
80766
):
Unknown
.
Nutrients (Ref.
124155
): Calcium = 33.9 [5.5, 192.1] mg/100g; Iron = 0.731 [0.184, 2.180] mg/100g; Protein = 19 [17, 21] %; Omega3 = 0.106 [0.043, 0.251] g/100g; Selenium = 37.8 [11.6, 121.9] μg/100g; VitaminA = 28.3 [8.8, 91.8] μg/100g; Zinc = 0.848 [0.399, 1.545] mg/100g (wet weight);
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