Carcharhinus obscurus, Dusky shark : fisheries, gamefish
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Carcharhinus obscurus (Lesueur, 1818)

Dusky shark
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Carcharhinus obscurus   AquaMaps   Data sources: GBIF OBIS
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Image of Carcharhinus obscurus (Dusky shark)
Carcharhinus obscurus
Picture by Randall, J.E.

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

Elasmobranchii (hajar och rockor) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: Greek, karcharos = sharpen + Greek, rhinos = nose (Ref. 45335).  More on author: Lesueur.

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

; marina; brackvatten revassocierade; havsvandrande (Ref. 51243); djupintervall 0 - 400 m (Ref. 244), usually 200 - 400 m.   Subtropical; 45°N - 46°S, 120°W - 156°E (Ref. 55186)

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

Western Atlantic: southern Massachusetts to Florida (USA), Georges Bank, Bahamas, Cuba, northern Gulf of Mexico, Nicaragua, southern Brazil and Uruguay (Ref. 58839). Eastern Atlantic: Canary Islands, Cape Verde, Senegal, Sierra Leone. Some records from the Mediterranean and Madeira may be based on Carcharhinus galapagensis. Indo-West Pacific: Red Sea (Ref. 5485), Mozambique and South Africa to Japan, China, Viet Nam and Australia. Eastern Pacific: southern California, USA to Gulf of California and the Revillagigedo Island. Highly migratory species, Annex I of the 1982 Convention on the Law of the Sea (Ref. 26139).

Length at first maturity / Size / Vikt / Age

Maturity: Lm 235.0, range 220 - 300 cm
Max length : 420 cm TL hane/ej könsbestämd; (Ref. 5578); common length : 250 cm TL hane/ej könsbestämd; (Ref. 26999); publicerad maxvikt: 346.5 kg (Ref. 4699); rapporterad maxålder: 40 år (Ref. 31395)

Short description Morfologi | Morfometri

Taggstrålar i ryggfenan (totalt): 0; Mjukstrålar i ryggfenan (totalt): 0; Taggstrålar i analfenan 0; Mjukstrålar i analfenan: 0. A large shark with a broadly rounded snout, triangular saw-edged upper teeth, curved moderate-sized pectoral fins, and an interdorsal ridge (Ref. 5578). Blue-grey, lead-grey above, white below; tips of pectoral and pelvic fins, as well as lower lobe of caudal fin and dorsal fins often dusky in young, plain in adults (Ref. 9997).

Biologi     Ordlista (t.ex. epibenthic)

Found in coastal and offshore waters but not oceanic (Ref. 5578). Adults are commonly found at depths of 200-400 m, young in shallower waters (Ref. 5485). A seasonal migratory species over parts of its range (Ref. 6871). Common component of the catch of the shark longline fishery (Ref.58048). Feeds on bottom and pelagic bony fish, sharks, skates, rays, cephalopods, gastropods, crustaceans, sometimes mammalian carrion and inorganic objects (Ref. 5578). Viviparous (Ref. 50449); with litter size number from 3-14 (Ref. 27549). Large adults are potentially dangerous (Ref. 4716, 6871). Utilized fresh, dried-salted, frozen and smoked for human consumption; hides for leather; fins for sharks-fin soup; and liver oil extracted for vitamins (Ref. 244).

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

Viviparous, with a yolk-sac placenta, litter size 3-14 pups (Ref. 244); 70-100 cm at birth (Ref. 6871). Gestation period of ~ 16 months (Ref.58048). Distinct pairing with embrace (Ref. 205).

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

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

IUCN Red List Status (Ref. 120744)

  Sårbar, se IUCNs rödlista (VU) (A1abd); Date assessed: 30 June 2000

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Traumatogenic (Ref. 4690)





Human uses

Fiskeri: kommersiell; sportfisk: ja
FAO(fiskeri: produktion, species profile; publication : search) | FishSource | Sea Around Us

Ytterligare information

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
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Allelfrekvenser
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Ljud
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Estimates based on models

Preferred temperature (Ref. 115969): 8.7 - 18.6, mean 12.6 (based on 736 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00759 (0.00432 - 0.01334), b=3.09 (2.95 - 3.23), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  4.3   ±0.2 se; Based on diet studies.
Resiliens (Ref. 120179):  Mycket låg, lägsta populationsfördubblingstid mer än 14 år (rm=0.02; also Musick et al. 2000 (Ref. 36717)).
Prior r = 0.09, 95% CL = 0.06 - 0.13, Based on 1 stock assessment.
Vulnerability (Ref. 59153):  Very high vulnerability (88 of 100) .
Price category (Ref. 80766):   Medium.