Squalus quasimodo, Humpback Western dogfish : fisheries

Squalus quasimodo Viana, Carvalho & Gomes, 2016

Humpback Western dogfish
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Image of Squalus quasimodo (Humpback Western dogfish)
Squalus quasimodo
Female Afbeelding van Viana, S.

Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

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)quasimodo: Named for the hunchback of Notre-Dame (19th Century novel by Victor Hugo), referring to its most noticeable character - body conspicuously robust and humped dorsally.
Eponymy: Not a true eponym but the name of the title character in Victor Hugo’s: The Hunchback of Notre Dame, referring to the prominent dorsal profile of these species. (Ref. 128868), visit book page.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

marien pelagic-oceanic. Tropical

Verspreiding Gebieden | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri

Southwest Atlantic: known as an endemic species in southern Brazil.

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 85.0 cm TL (female)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Wervels: 116 - 121. This species can be distinguished from its congeners through the following set of characters: body which is conspicuously robust and humped dorsally; second dorsal fin is upright and markedly tall (height 4.0%, 4.7%-5.3% TL); first and second dorsal-fin spines are elongated (first dorsal-fin spine length 4.3%, 3.3%-4.3% TL and second dorsal-fin spine length 4.4%, 3.9%-4.3% TL), and broad at base (first spine base length 0.9%, 0.7%-1.0% TL; second spine base length 1.0%, 0.8%-0.9% TL); caudal fin have a conspicuous rectangular dorsal lobe; the dermal denticles are tricuspid, markedly imbricate and broad at crown; differs from S. bahiensis by having a larger pectoral-fin anterior margin length, 15.9%, 15.5%-16.0% TL (vs. 14.3%, 14.4%-14.5% TL) and more elongate first dorsal-fin spine, its length 4.3%, 3.3%-4.3% TL (vs. 2.8%, 2.9%-3.0% TL), has a larger first dorsal fin with greater anterior margin length, 11.2%, 10.8%-11.4% TL (vs. 10.5%, 10.3%-10.6% TL) and fin base (length 8.2%, 7.7%-8.5% TL vs. 7.5%, 7.2%-7.3% TL, respectively); differs from S. lobularis by having a greater interdorsal distance, 26.4%, 24.0%-25.8% TL (vs. 22.3%, 21.9%-23.6% TL) (Ref. 109601).
Body shape (shape guide): fusiform / normal; Cross section: angular.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Viana, S.T.d.F., M.R. De Carvalho and U.L. Gomes, 2016. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa 4133(1):1-89. (Ref. 109601)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Onvoldoende gegevens (DD) ; Date assessed: 08 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van potentieel belang
FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00912 (0.00341 - 0.02439), b=3.02 (2.79 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau
(Ref. 69278)
4.1   ±0.4 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 van de visserij
(Ref. 59153)
High vulnerability (63 of 100). 🛈