Elasmobranchii (haaien en roggen) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436); notocaudatus: Name from Latin 'nota' for mark and 'cauda' for tail, referring to the dark bar on the caudal fin..
More on authors: Last, White & Stevens.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien; diepte 225 - 454 m (Ref. 58440). Tropical
Western Pacific: Queensland, Australia.
Grootte / Gewicht / Leeftijd
Maturity: Lm ?  range ? - ? cm
Max length : 61.9 cm TL mannelijk / geslacht onbekend; (Ref. 58440)
Korte beschrijving
Morfologie | Morfometrie
This species in the 'highfin megalops group' is distinguished by the following set of characters: abdomen depth 8.6-11.1% TL; pre-vent length 45.3-46.5% TL, 1.9-2.0 times dorsal caudal margin; pre-second dorsal length 3.6-4.0 times pectoral-fin anterior margin, 2.4-2.6 times dorsal caudal margin; head width 1.4-1.6 times abdomen width; preoral length 2.8-3.2 times the horizontal prenarial length, 8.4-9.5% TL; head length 3.8-4.3 times its eye length;
mouth width 3.4-4.3 times the length of upper labial furrow; interorbital width 1.4-1.5 times the horizontal preorbital length; fifth gill slit height 1.9-2.1% TL; strongly bifurcated anterior nasal flap; first dorsal fin upright, upper posterior margin almost vertical, greatest concavity closer to free rear tip than fin apex; posterior margin of second dorsal fin deeply concave; second dorsal-fin spine with a broad base; pectoral fin of adult weakly falcate, anterior margin long, 14.6-16.4% TL; both dorsal and ventral surfaces are pale; dorsal fins pale with obvious dark
tips; first dorsal-fin spine and base of soft portion of dorsal fin both pale; caudal fin with broad white posterior margin; prominent dark, diagonal subterminal streak parallel to the upper posterior margin; flank denticles strongly tricuspid; monospondylous centra 47-49, precaudal
centra 94-97, total centra 123-127 (Ref. 58440).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Distinct pairing with embrace (Ref. 205).
Last, P.R., W.T. White and J.D. Stevens, 2007. New species of Squalus of the 'highfin megalops group' from the Australasian region. p. 39-53. In P.R. Last, W.T. White and J.J. Pogonoski Descriptions of new dogfishes of the genus Squalus (Squaloidea:Squalidae). CSIRO Marine and Atmospheric Research Paper No. 014. 130 p. (Ref. 58440)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Meer informatie
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Estimates based on models
Preferred temperature (Ref.
123201): 8.7 - 17.5, mean 13 °C (based on 25 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00339 (0.00162 - 0.00707), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.2 ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (45 of 100).