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Pristiophorus delicatus, Tropical sawshark
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Tropical sawshark
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drawing shows typical species in Pristiophoridae.
Elasmobranchii (sharks and rays) >
Pristiophoriformes
(Saw sharks) >
Pristiophoridae
(Saw sharks)
Etymology:
Pristiophorus:
pristio-
, presumably derived from
prio
(Gr.), to saw, but treated here as a noun (a saw);
phorus
, from
phoreus
(Gr.), bearer or carrier, referring to saw-like snout (note also that
pristis
is Greek for sawfish). (
See ETYFish
)
;
delicatus:
Latin for dainty or delicate, referring to fine, delicate rostral teeth on elongated rostrum. (
See ETYFish
)
.
More on authors:
Yearsley
,
Last
&
White
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; pelagic-oceanic; depth range 246 - 405 m (Ref.
76934
). Tropical
Western Pacific: Australia.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 62.5 cm TL male/unsexed; (Ref.
76934
); 84.5 cm TL (female)
Short description
Morphology
|
Morphometrics
This small species possess the following characters: nostril to barbel origin is 3.2-3.7 times mouth to nostril; prenasal length 1.7-1.8 times the prebarbel length; preoral length 2.1-2.4 times the interdorsal space; pectoral anterior margin 1.2-1.5 times the dorsal-caudal space; dorsal caudal margin 4.4-5.0 times caudal fin depth; width of mouth 2.7-3.7 times the length spiracle; color dorsally pale to medium yellowish brown, ventrally pale whitish to yellowish; 49-55 monospondylous centra; 50-54 precaudal diplospondylous centra; 149-156 total vertebral centra (Ref.
76934
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Yearsley, G.K., P.R. Last and W.T. White
, 2008. A new species of sawshark,
Pristiophorus delicatus
sp. nov. (Pristionphoriformes: Pristiophoridae), from Northeastern Australia. pp. 23-33. In P.R. Last, W.T. White and J.J. Pogonoski (eds). Descriptions of new Australian chondrichthyans. CSIRO Marine and Atmospheric Research Paper no. 22. 365 p. (Ref.
76934
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
20 February 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 8.8 - 18.9, mean 13 °C (based on 19 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.9 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153
): Moderate to high vulnerability (54 of 100).
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- 20 July 2016
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