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); lobularis: Name from Latin word 'lobus', referring to its diagnostic broad and lobe-like dorsal and pectoral fins..
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien benthopelagisch. Subtropical
Verspreiding
Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri
Southwest Atlantic: from southern Brazil to Uruguay, Patagonia in Argentina where it seems to be more common.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 64.0 cm TL mannelijk / geslacht onbekend; (Ref. 109601); 72.5 cm TL (female)
Korte beschrijving
Morfologie | Morfometrie
This species is distinguished from its congeners by the following characters: dorsal fins markedly broad and lobe-like and with a short clasper groove, not reaching the rhipidion; differs from S. mitsukurii by having a slender body (vs. highly robust), pectoral-fin posterior margin is concave (vs. straight); interorbital space narrower, 8.8%, 6.8%-8.5% TL (vs. 9.3%, 9.1%-9.8% TL); inner clasper length 1.4 times pelvic-fin inner margin length (vs. 0.7-1.1 times); differs from species of the Squalus megalops group by the having a snout relatively long (vs. short), pectoral fins markedly broad (vs. often very narrow), pectoral free rear tips rounded and lobe-like (vs. often triangular); dermal denticles tricuspidate (vs. lanceolate); further differs from all congeners by having a much larger pectoral-inner margin length (10.5%, 9.2%-11.0% TL), except from S. acanthias (Ref. 109601).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Gevaar voor de mens
Harmless
Gebruik door de mens
Meer informatie
LandenFAO regio'sEcosystemenVoorkomenIntroductiesStocksEcologieDieetVoedselitemsVoedselconsumptieRantsoen
Lokale namenSynoniemenMetabolismePredatorenEcotoxicologieVoortplantingMaturiteitPaaienPaaiaggregatiesFecunditeitEierenOntwikkeling van de eieren
Leeftijd/GrootteGroeiLengte-gewichtLengte-lengteLengtefrequentiesMorfometrieMorfologieLarvenLarvale populatiedynamiekRekruteringAbundantieBRUVS
ReferentiesAquacultuurAquacultuurprofielKweeklijnenGeneticaElectrophoresesErfelijkheidZiektesVerwerkingNutrientsMassaconversie
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00346 - 0.02519), 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): 4.3 ±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 to high vulnerability (49 of 100).
