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Carcharhinus coatesi
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drawing shows typical species in Carcharhinidae.
Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Carcharhinidae
(Requiem sharks)
Etymology:
Carcharhinus:
karcharos
(Gr.), sharp or jagged;
rhinus
, an ancient name for sharks, from
rhine
(Gr.), rasp, both words alluding to a shark's jagged, rasp-like skin. (
See ETYFish
)
;
coatesi:
In honor of angler, artist and illustrator George Coates (d. 1980), who captured many elasmobranchs in North Queensland, Australia, including holotype of this one. (
See ETYFish
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 0 - 123 m (Ref.
106604
). Tropical
East Indian to Western Pacific: Australia and possibly off New Guinea.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - 70 cm
Max length : 87.0 cm TL male/unsexed; (Ref.
89954
); 88.0 cm TL (female)
Short description
Morphology
|
Morphometrics
This species is distinguished by the following characters: moderately long and narrowly rounded snout; oblique and blade-like upper anterior teeth are coarsely serrated, lateral margin deeply notched, with several large and smooth basal cusplets; lower anterior teeth are narrower, slightly oblique, with lateral margins notched and usually several smooth basal cusplets; total tooth row counts 24-26/23-25, or 47-51; interdorsal space with ridge on midline, 18.0-23.1% TL; moderately tall and slightly falcate first dorsal fin, its origin just anterior to pectoral-fin free rear tip, length 14.8-17.3% TL, 1.5-1.9 times height, inner margin 2.0-2.8 in base; a much smaller second dorsal fin, broadly triangular, height 28-37% of first dorsal-fin height, origin about opposite to anal-fin origin; falcate anal fin, its height 0.9-1.4 times second dorsal height, base 0.9-1.2 times second dorsal-fin base; body colour pale brownish to grey dorsally, whitish ventrally; second dorsal fin with a black blotch on upper one to two thirds of fin, not extending onto upper surface of body and well defined from ground colour; other fins are plain or with pale outer margins; total vertebral counts 134-147; monospondylous precaudal counts 42-50; diplospondylous precaudal counts 22-33; diplospondylous caudal counts 64-73; precaudal counts 67-76 (Ref.
89954
).
Reproduction of this species apparently not seasonal, with litter size of 1-3 (mean 2) and size at birth of 38.0-40.0 cm TL (Ref.
89954
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
White, W.T.
, 2012. A redescription of
Carcharhinus dussumieri
and
C. sealei
, with resurrection of
C. coatesi
and
C. tjutjot
as valid species (Chondrichthyes: Carcharhinidae). Zootaxa 3241:1-34. (Ref.
89954
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
23 July 2018
CITES
Appendix II:
International trade monitored
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00221 - 0.01036), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.0 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153
): High vulnerability (55 of 100).
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mrius-barile
- 20 July 2016
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