Alopias pelagicus

NAKAMURA, 1935


Pelagic thresher
Classification: Elasmobranchii Lamniformes Alopiidae

Reference of the original description
NAKAMURA, H. (1935)
On the two species of the thresher shark from Formosan waters. Memoirs Faculty Science Taihoku Imperial University Formosa, 14 (1): 1-6, pls 1-3

Synonyms / new combinations and misspellings
Alopias aff. pelagicus, Alopias pelagios

Types
Alopias pelagicus



Description:


Citation: Alopias pelagicus NAKAMURA, 1935: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2014

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Alopias pelagicus NAKAMURA, 1935, © U.S. National Oceanic and Atmospheric Administration

Common names
spa Tiburon zorro, spa Zorro de mar, spa Zorro pelágico, fra \(T\) Renard pélagique, fra \(T\) Requin-renard, eng Fox shark, eng Pelagic thresher, eng Pelagic thresher shark, eng Small tooth thresher shark, eng Smalltooth thresher, eng Smalltooth thresher shark, eng Thresher shark, eng Whiptail shark, por Tubarão-raposo-do-Indico, por Zorro pelágico

Short Description
A small thresher with moderately large eyes, a broadly convex forehead, a very narrow caudal tip, and straight, broad-tipped pectoral fins [536]. Upper lobe of caudal fin very long and strap-like, almost equal to length of rest of shark; lower lobe short but strong; terminal lobe very small [20050]. Dark blue on back and sides, underside white; no white patch over pectoral fin bases [536].
Diet: 2013: Ecuadorian waters (data base: 111 speciemens, collected between June and December 2003): Stomach content analysis showed that approximately 77% (n: 85) of stomachs contained prey, of 24 species, including one crustacean, 7 cephalopods, and 16 teleost fishes. According to the %IRI, the three most common components were Dosidicus gigas (66%), Behthosema panamense (30%) and Sthenoteuthis oualanensis (2.9%). The monthly dietary data showed that sharks mainly fed on these three species across all seasons, but the sample sizes were small in some months. Other fish, such as the Pacific sardine Sardinops sagax Jenyns, 1842, hake Merluccius gayi Guichenot, 1848 and squid Loliolopsis diomedeae Hoyle, 1904, were also important prey in some months. [19463]

Distribution
Circumglobal. Indo-Pacific: Red Sea, Arabian Sea, Maldives [12155], Somalia, South Africa, Western Australia, China, Taiwan, Japan, New Caledonia, Hawaiian Islands and Tahiti. Eastern Pacific: Gulf of California and the Galapagos. Reliable records lacking partly due to its confusion with Alopias vulpinus. Firs record: 2012: Lakshadweep Sea, India (10°52'N latitude 72°13'E longitude) [15389]

Human uses
fisheries: commercial; gamefish: yes

Biology
Exhibit ovoviparity (aplacental viviparity), with embryos feeding on other ova produced by the mother (oophagy) after the yolk sac is absorbed [733] (Ref. 42326). Usually with at least two young [1388]. Size at birth about 100 cm [1388]; 130-160 cm TL [2539]. Distinct pairing with embrace [17086]. A carnivore [17641]. A pelagic species occasionally advancing into coastal waters [17641].

Size / Weight / Age
347 cm TL (male/unsexed; (Ref. 48844)); 383 cm TL (female); max. reported age: 29 years (Ref. 48844)

Habitat
pelagic-oceanic; oceanodromous [17660]; marine; depth range 0 - 300 m (Ref. 37816), usually 0 - 150 m (Ref. 55167)

Parasites (arranged by Jürgen Pollerspöck)
Cestoda
Nematoda
Copepoda