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Chaenogaleus macrostoma, Hooktooth shark : fisheries
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Chaenogaleus macrostoma
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Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Hemigaleidae
(Weasel sharks)
Etymology:
Chaenogaleus:
chaeno-
, from
chaino
(Gr.), gape, referring to “rictus as long as wide”;
galeos
, a small shark or dogfish per Aristotle (sometimes translated as weasel, hence the name Weasel Sharks, possibly referring to the pointed snouts, swift movements and/or rapacious feeding behavior of smaller predatory sharks1), but in this case probably an allusion to
Hemigaleus
, original genus of
C. macrostoma
. (
See ETYFish
)
;
macrostoma:
macro-
, from
makros
(Gr.), large or long;
stoma
(Gr.), mouth, referring to long, greatly arched mouth compared with
Hemigaleus microstoma
, its presumed congener at the time. (
See ETYFish
)
.
More on author:
Bleeker
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range ? - 59 m (Ref.
244
). Tropical; 30°N - 10°S
Indo-West Pacific: Persian Gulf (Ref.
13567
), Pakistan, India, Sri Lanka, Singapore, Thailand, Viet Nam, China, Taiwan, Java and Sulawesi in Indonesia. This name has been used indiscriminately for the three species of hemigaleids in Indo-Pakistani waters other than
Hemipristis elongatus
.
Length at first maturity / Size / Weight / Age
Maturity: L
m
82.5
, range 68 - 97 cm
Max length : 100.0 cm TL male/unsexed; (Ref.
244
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. Bronzy-grey above, white below when fresh, fading to greyish or greyish brown in preservation, dorsal fins often with dusky or black tips (Ref.
13567
).
A common inshore and offshore shark found on the continental and insular shelves (Ref.
13567
). Probably feeds on small fishes, cephalopods, and crustaceans (Ref.
244
). Viviparous (Ref.
50449
). Caught irregularly by inshore gillnet fisheries and occasionally by small-scale longlining (Ref.58048). Probably taken by artisanal fisheries wherever it occurs (Ref.
13567
). Utilized fresh for human consumption and by-products processed into fishmeal (Ref.
244
).
Viviparous (with a yolk-sac placenta), with 4 young in a litter (Ref.
244
). Size at birth at least 20 cm (Ref.
244
). 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
)
Vulnerable (VU)
(A2d); Date assessed:
12 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
): 25 - 29.3, mean 28.4 °C (based on 1082 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.0039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00223 - 0.00470), b=3.02 (2.92 - 3.12), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 4.2 ±0.57 se; based on food items.
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (Fec=4).
Fishing Vulnerability (Ref.
59153
): High vulnerability (60 of 100).
Price category (Ref.
80766
):
Unknown
.
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- 20 July 2016
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