Squalus bucephalus, Bighead spurdog

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Squalus bucephalus Last, Séret & Pogonoski, 2007

Bighead spurdog
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Squalus bucephalus
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Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

Élasmobranches (requins et raies) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436);  bucephalus: Name from Latin 'bu; meaning large and from Greek 'kephalis' = of the head, referring to its relatively bulky head..
More on authors: Last, Séret & Pogonoski.

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

marin; profondeur 448 - 880 m (Ref. 58438). Tropical

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Western Pacific: northern Tasman Sea on Norfolk Ridge (Stylaster Seamount), and off New Caledonia.

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 90.0 cm TL mâle / non sexé; (Ref. 58438)

Description synthétique Morphologie | Morphométrie

This large, broad-headed species of the 'megalops-cubensis group' is distinguished by the following set of characters: head width at mouth 12.1-13.5% TL; mouth width 2.2-2.7 times its horizontal prenarial length; direct pre-second dorsal length 3.9-4.0 times the pectoral-fin anterior margin, 2.7 times dorsal caudal margin; preoral length 2.7-3.1 times the horizontal prenarial length, 9.2-10.5% TL; strongly bifurcated anterior nasal flap; low and raked first dorsal fin; exposed bases of dorsal-fin spines are broad, 0.7-0.8% TL; both dorsal fins with short inner margins, first dorsal-fin height 1.4-1.5 times its inner margin length, second dorsal-fin height 0.8-1.0 times its inner margin length; pectoral-fin anterior margin 1.8-2.0 times its inner margin length; preventral caudal margin 1.8-2.2 times the inner margin of pelvic fin; dorsal fins with dark distal portion, posterior margin of free rear tip pale; caudal fin upper posterior margin broadly white, lower lobe with dark base and pale outer half, no caudal bar; flank denticles unicuspid or weakly tricuspid; monospondylous centra 45, precaudal centra 86-89, total centra 113-118 (Ref. 58438).

Biologie     Glossaire (ex. epibenthic)

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Distinct pairing with embrace (Ref. 205).

Référence principale Upload your references | Références | Coordinateur : Compagno, Leonard J.V. | Collaborateurs

Last, P.R., B. Séret and J.J. Pogonoski, 2007. Squalus bucephalus sp. Nov., a new short-snout spurdog from New Caledonia. p. 23-29. 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. 58438)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

  Données manquantes (DD) ; Date assessed: 20 June 2017

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

FAO - Publication: search | FishSource |

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Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: génôme, nucléotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
Niveau trophique (Ref. 69278):  4.3   ±0.4 se; based on size and trophs of closest relatives
Résilience (Ref. 120179):  Très faible, temps minimum de doublement de population supérieur à 14 ans (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  High vulnerability (56 of 100).