Squalus hemipinnis, Indonesian shortsnout spurdog

Squalus hemipinnis White, Last & Yearsley, 2007

Indonesian shortsnout spurdog
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Squalus hemipinnis   AquaMaps   Data sources: GBIF OBIS
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Image of Squalus hemipinnis (Indonesian shortsnout spurdog)
Squalus hemipinnis
Female picture by Krajangdara, T. & S. Rodpradit

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Squaliformes (Bramble, sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).  More on authors: White, Last & Yearsley.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; marien benthopelagisch; diepteverspreiding 1 - 100 m (Ref. 58445).   Tropical

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Eastern Indian Ocean: Indonesia.

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm ?, range 43 - ? cm
Max length : 52.2 cm TL mannelijk/geslacht niet bekend; (Ref. 58445); 78.0 cm TL (female)

Korte beschrijving Morfologie | Morfometrie

This species is distinguished by the following set of characters: slender body of moderate size, depth 9-10.6% TL; relatively narrow and very short snout, horizontal prenarial length is 8.4-9.1% TL; large eyes, length 5.1-5.6% TL; secondary lobe of anterior nasal flap is well developed; small dorsal fins that are strongly raked; first dorsal-fin spine is moderate, broad-based while the second dorsal-fin spine is moderate, robust and broad-based; weakly falcate pectoral fin in adults its inner margin relatively short, 6.9-7.8% TL; caudal fin with a short, broad caudal bar, enlarged upper caudal blotch and the fringe is located distally on lobe in juveniles; flank denticles are broadly unicuspidate to weakly tricuspidate; monospondylous centra 35-38, precaudal centra 72-76, total centra 96-100 (Ref. 58445).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Apparently occurs on or near the bottom of upper continental and insular slopes, but depth distribution is undetermined; probably on shallower water than its congeners. Presumably feeds on small fishes, cephalopods and crustaceans. Viviparous, with yolk-sac dependency. Gives birth to 3 -10 pups, but gestation period is unknown. Males mature at about 43 cm TL and females by 61 cm TL; with largest embryo measured at 18 cm. The species is a very common catch component fo the demersal longline fishery in deepwater areas in eastern Indonesia. It is caught for its meat, fins and liver oil (Ref. 58042).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Distinct pairing with embrace (Ref. 205).

Voornaamste referentie Upload your references | Referenties | Coördinator : Compagno, Leonard J.V. | Medewerkers

White, W.T., P.R. Last and G.K. Yearsley, 2007. Squalus hemipinnis sp. Nov., a new short-snout spurdog from eastern Indonesia. pp. 101-108. 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 pp. (Ref. 58445)

Status op de Rode Lijst van het IUCN (Ref. 120744)

  Bijna bedreigd (NT) ; Date assessed: 01 December 2008

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Preferred temperature (Ref. 115969): 25.6 - 28.7, mean 28.3 (based on 20 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00331 (0.00153 - 0.00716), b=3.09 (2.91 - 3.27), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  4.3   ±0.3 se; Based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  High to very high vulnerability (69 of 100) .