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Figaro striatus, Northern sawtail shark
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Northern sawtail shark
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drawing shows typical species in Pentanchidae.
Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Pentanchidae
(Deepwater catsharks)
Etymology:
Figaro:
Presumably named for the eponymous barber in various dramas (e.g.,
The Marriage of Figaro
), allusion not explained nor evident. (
See ETYFish
)
;
striatus:
Latin for grooved or furrowed (authors say “striped,” referring to its striped color pattern. (
See ETYFish
)
.
More on authors:
Gledhill
,
Last
&
White
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 300 - 419 m (Ref.
76950
). Tropical
Western Pacific: Australia.
Size / Weight / Age
Maturity: L
m
?
range ? - 38 cm
Max length : 42.1 cm TL male/unsexed; (Ref.
76950
); 36.9 cm TL (female)
Short description
Morphology
|
Morphometrics
A very small species of catshark with the following characters: head in dorsoventral view narrowly parabolic, short 17.2-19.6% TL; small eye, its length 3.4-3.9% TL, 1.73-2.03 in snout, dorsolaterally located; well developed labial furrows , extending well beyond corners of mouth, lower furrow is slightly longer than the upper one; first dorsal fin is slightly smaller than the second one; small pelvic fins, slender, length 8.8-11.3% TL; posterior portion strongly directed posterodorsally (forming a small lobe, enveloping partly the proximo-lateral margin of clasper); strongly convex inner margin, forming a partial apron and connected to clasper dorsomedially near its base, soft tissue connecting insertions of pelvic fins is weak, not forming a prominent apron overlying ventral surface of tail; a much longer anal-fin base than second dorsal fin, base 9.9-10.9% TL, 2.4-6.0 times anal-caudal space; long caudal peduncle, anal-caudal space 1.6-4.2% TL; crest of enlarged denticles on anterior dorsal caudal-fin margin extending from about over origin of ventral caudal-fin lobe to almost mid-length of dorsal caudal-fin margin; crest of enlarged denticles originating at mid-point of caudal peduncle, extending to elevated part of ventral lobe; size at maturity for at about 38.0 cm TL; preserved color pale brown dorsally, with dark saddles and bars, lighter ventrally; pre-dorsally with about 4 larger saddles; saddles present below and between dorsal fins and extending onto caudal, these are rarely larger than eye diameter; larger saddles are pale edged, separated by narrower, less distinct bars; saddles rarely extending below the lateral midline; 35-38 monospondylous vertebrae; 85-93 precaudal; 140-149 in total (Ref.
76950
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Gledhill, D.C., P.R. Last and W.T. White
, 2008. Resurrection of the genus
Figaro
Whitley (Carcharhiniformes: Scyliorhinidae) with the description of a new species from northeastern Australia. In Last, P.R., White, W.T. & Pogonoski, J.J. (eds.): Descriptions of New Australian Chondrichthyans. CSIRO Marine and Atmospheric Research Paper no. 22. (Ref.
76950
)
IUCN Red List Status (Ref.
130435
)
Data deficient (DD)
; Date assessed:
02 May 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 7.1 - 17.4, mean 13 °C (based on 20 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00176 - 0.00714), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-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
): Low to moderate vulnerability (32 of 100).
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- 20 July 2016
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