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Alopias vulpinus (Bonnaterre, 1788)

Thresher
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Native range | All suitable habitat | Point map | Year 2050
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Alopias vulpinus   AquaMaps   Data sources: GBIF OBIS
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Image of Alopias vulpinus (Thresher)
Alopias vulpinus
Picture by S. Iglesels et al


Faeroe Islands country information

Common names: Revaháur, Revahávur
Occurrence: native
Salinity: marine
Abundance: scarce (very unlikely) | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: One male, 444 cm long, 197 kg, was taken 10 Jan. 1960 on a long line set for Porbeagle at the Faroe Bank from a Faroe cutter.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/fo.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Joensen, J.S. and Å. Vedel Tåning, 1970
National Database:

Common names from other countries

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) > Lamniformes (Mackerel sharks) > Alopiidae (Thresher sharks)
Etymology: Alopias: From alopex, Greek for fox, referring to the ancient vernacular “fox shark,” from its supposed cunning (ancients believed that when it took a bait, it swallowed the hook until it got to the cord, which it bit off and so escaped). (See ETYFish);  vulpinus: Latin for fox-like (as for genus). (See ETYFish).
  More on author: Bonnaterre.

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

Θαλασσινό(ά); ωκεανόδρομο(ς) (Ref. 51243); εύρος βάθους 0 - 650 m (Ref. 106604), usually 0 - 200 m (Ref. 55168).   Subtropical; 74°N - 58°S, 180°W - 180°E (Ref. 54279)

Κατανομή Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri

Cosmopolitan in temperate and tropical seas (Ref. 6871, 58085). Population considered reduced (R) in the US Atlantic waters; lower risk/conservation dependent (LR/CD) in US Pacific waters; data deficient (DD) in the rest of Atlantic and rest of Pacific (Ref. 12451). Highly migratory species.

Length at first maturity / Μέγεθος / Βάρος / Age

Maturity: Lm 351.0, range 226 - 400 cm
Max length : 573 cm TL αρσενικό/απροσδιόριστο; (Ref. 106604); 549.0 cm TL (female); common length : 450 cm TL αρσενικό/απροσδιόριστο; (Ref. 5217); μεγ. δημοσιευμένο βάρος: 348.0 kg (Ref. 40637); μεγ. αναφερόμενη ηλικία: 25 έτη (Ref. 81241)

Short description Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία

Ραχιαίες άκανθες (συνολικά) : 0; Εδρικές άκανθες: 0. A large thresher with relatively small eyes, curved, narrow-tipped pectoral fins, a narrow-tipped caudal fin, and a conspicuous white patch over the pectoral fin bases (Ref. 5578). Second dorsal origin well behind the rear tip of the pelvic fin (Ref. 559). Upper lobe of caudal fin very long and strap-like, about as long as or longer than length of rest of shark; lower lobe short but well developed (Ref. 13570). Brown, grey, blue-grey, or blackish on back and underside of snout, lighter on sides and abruptly white below; a white area extends from the abdomen over the pectoral-fin bases; pectoral-, pelvic-, and dorsal fins blackish, white dots sometimes present on pectoral-, pelvic-, and caudal- fin tips (Ref. 13570).

Βιολογία     Γλωσσάρι (π.χ. epibenthic)

Coastal over continental and insular shelves and epipelagic far from land (Ref. 30573, 43278, 58302). Oceanic although most abundant near land, pelagic at 1-366 m (Ref. 58302). Young often close inshore and in shallow bays (Ref. 5578). Feeds on schooling fishes (including mackerels, bluefishes, clupeids, needlefishes, lancetfishes and lanternfishes), squid, octopi, pelagic crustaceans, and rarely seabirds (Ref. 247). Ovoviviparous, embryos feeding on yolk sac and other ova produced by the mother (Ref. 43278, 50449). Uses its long caudal fin to bunch up and stun prey (Ref. 2850). Spatial and depth segregation by sex in northwestern Indian Ocean populations (Ref. 247). A few attacks on boats are doubtfully attributed to this species, but it is otherwise apparently harmless to humans, though the size of adults of this species command respect (Ref. 247). May cause damage to fishing gear (Ref. 6885). Valued for its meat, liver, hide, and fins; utilized fresh, dried-salted, smoked, and frozen (Ref. 9987).

Life cycle and mating behavior Maturities | Αναπαραγωγή | Spawnings | Egg(s) | Fecundities | Προνύμφες

Ovoviviparous, embryos feed solely on the ova produced by the mother after the yolk sac is absorbed (oophagy) (Ref. 50449), 2 to 4 young in a litter (usually 2) (Ref. 247). Size at birth 114-150 cm (Ref. 247). Distinct pairing with embrace (Ref. 205).

Main reference Upload your references | Αναφορές | Συντονιστής : Compagno, Leonard J.V. | Συνεργάτες

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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCN Red List Status (Ref. 130435)

  Ευάλωτο, βλέπε Κόκκινη Λίστα (VU) (A2bd); Date assessed: 06 November 2018

CITES (Ref. 128078)


Threat to humans

  Harmless (Ref. 247)




Human uses

αλιεία: Εμπορικό(ά); αλιεία αναψυχής: ναί

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Estimates based on models

Preferred temperature (Ref. 115969): 11.6 - 28.2, mean 23.3 (based on 8352 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00363 - 0.01997), b=2.86 (2.66 - 3.06), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Τροφικό Επίπεδο (Ref. 69278):  4.5   ±0.0 se; based on diet studies.
Ελαστικότητα (Ref. 120179):  Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (K=0.1; tm=5-7; tmax=19; Fec=2-4).
Prior r = 0.05, 95% CL = 0.03 - 0.07, Based on 1 full stock assessment.
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (77 of 100).
Climate Vulnerability (Ref. 125649):  High vulnerability (62 of 100).
Price category (Ref. 80766):   High.