You can sponsor this page

Squalus megalops (Macleay, 1881)

Shortnose spurdog
Add your observation in Fish Watcher
Upload your photos and videos
Pictures | Google image
Image of Squalus megalops (Shortnose spurdog)
Squalus megalops
Picture by Gloerfelt-Tarp, T.

Classification / Names Populärnamn | synonymer | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (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 author: Macleay.

Issue
Junior synonym Squalus acutipinnis Regan, 1908 is considered a valid species in Ref. 109601. Validity needs further confirmation.

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

; marina bottenlevande; djupintervall 30 - 750 m (Ref. 27121), usually 80 - 300 m (Ref. 57911).   Subtropical; 9°C - 23°C (Ref. 57911); 42°N - 41°S, 18°W - 169°E (Ref. 247)

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Eastern Indian Ocean: previously considered to be an Australian endemic (Ref. 49645). Eastern Atlantic: confirmed to occur in the Mediterranean (Ref. 93472). Dogfishes presently referred to in current literature as Squalus megalops appear to belong to a complex of similar species. Specimens from the different regions still need to be compared carefully (Ref. 6871).

Length at first maturity / Size / Vikt / Age

Maturity: Lm 59.0, range 49 - 57 cm
Max length : 72.0 cm TL hane/ej könsbestämd; (Ref. 104718); 89.0 cm TL (female); rapporterad maxålder: 32 år (Ref. 93445)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 2; Mjukstrålar i ryggfenan (totalt): 0; Taggstrålar i analfenan 0; Mjukstrålar i analfenan: 0. A small dogfish with a short, angular snout and a small mouth almost as wide as the snout is long; body without spots; 1st dorsal fin spine over pectoral fins (Ref. 5578). Bronze-grey above, white below; dorsal fins with black tips and white edges but markings inconspicuous in adults (Ref. 5578).

Biologi     Ordlista (t.ex. epibenthic)

Found on the outer continental shelves and upper slopes, on or near the bottom (Ref. 31367); sublittoral below 130 m (Ref. 11230). Young mostly pelagic off the outer shelves (Ref. 5578). Aggregations by sex are regularly observed (Ref. 6871). Feeds on bony fishes, shrimps and other crustaceans, cephalopods and other elasmobranchs (Ref. 247). Ovoviviparous (Ref. 205), with 2 to 4 young in a litter (Ref. 247). Gestation period is 2 years (Ref. 36731). Utilized for human consumption, the flesh most appealing dried salted or smoked (Ref. 6871). Also consumed fresh (Ref. 31367). Minimum depth reported from Ref. 6808.

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

Distinct pairing with embrace (Ref. 205). Ovoviviparous, with 2 to 4 young in a litter. Gestation period is about two years. Size at birth 20-24 cm TL (Ref. 6871).

Main reference Upload your references | referenser | Koordinator : Compagno, Leonard J.V. | Medarbetare

Last, P.R. and J.D. Stevens, 1994. Sharks and rays of Australia. CSIRO, Australia. 513 p. (Ref. 6871)

IUCN Red List Status (Ref. 120744)

  Data deficient (DD) ; Date assessed: 30 April 2003

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fiskeri: kommersiell; sportfisk: ja
FAO(fiskeri: species profile; publication : search) | FishSource |

Ytterligare information

Länder
FAO områden
Ekosystem
Förekomster
Utplanteringar
Stocks
Ekologi
Föda
Födoslag
Födointag
Näringsinnehåll
Populärnamn
synonymer
Metabolik
Predatorer
Ekotoxikologi
Reproduktion
Könsmognad
Lek
Spawning aggregation
Fecundity
Ägg
Egg development
Age/Size
Tillväxt
Length-weight
Length-length
Length-frequencies
Morfometri
Morfologi
Larver
Larvdynamik
Rekrytering
Abundans
referenser
Vattenbruk
Vattenbruksprofil
Avelslinjer
Genetik
Allelfrekvenser
Ärftlighet
Sjukdomar
Behandling
Mass conversion
Medarbetare
Bilder
Stamps, Coins Misc.
Ljud
Ciguatera
Hastighet
Simsätt
Gälyta
Otoliths
Hjärnstorlek
Syn

Verktyg

Special reports

Download XML

Internet-källor

Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Nationella databaser | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia(Go, sök) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 12.8 - 22.8, mean 17.3 (based on 216 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00398 (0.00247 - 0.00642), b=3.07 (2.93 - 3.21), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  4.3   ±0.3 se; Based on diet studies.
Resiliens (Ref. 69278):  Mycket låg, lägsta populationsfördubblingstid mer än 14 år (tmax = 32; Fec=2).
Vulnerability (Ref. 59153):  High to very high vulnerability (69 of 100) .
Price category (Ref. 80766):   Medium.