Alopias


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Alopias

 

(thresher sharks), the only genus of the family Alopidae of the suborder Selachoidei. Body length, up to 6 m; weight, up to 450 kg. The upper lobe of the tail is very long. There are four species, distributed in the warm waters of all oceans, usually far from shore. The thresher (Alopias vulpinus), which is found primarily in subtropical regions, migrates to moderately warm seas in the summer. The sharks are viviparous, bearing two to four young, which measure up to 1.5 m long. They feed on shoals of fish and on squids, which they stun with blows of the tail. Thresher sharks are not dangerous to man, and their commercial value is slight.

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Environmental preferences of Alopias superciliosus and Alopias vulpinus in waters near Marshall Islands.
Biologists at the SWFSC also designed a protocol for collection of life history and distribution data on swordfish, marlins (primarily striped marlin, Tetrapturus audax), and pelagic sharks (primarily common thresher, Alopias vulpinus; shortfin mako, Isurus oxyrinchus; and blue, Prionace glauca).
The California drift gillnet fishery for broadbill swordfish, Xiphias gladius, and common thresher shark, Alopias vulpinus, developed in the late 1970's when incidental catches of pelagic sharks in small-mesh coastal drift gillnets targeting barracuda, Sphyraena argentea, and white seabass, Atractoscion nobilis, motivated fishermen to experiment with large-mesh nets targeting thresher shark.
5 Alopias superciliosus NoA 444 410 341 276 Alopias superciliosus NP 422 357 341 288 Squalus acanthias NP 130 103 94 78.
9% for Isurus oxyrinchus, 22% for Dalatias licha, 16% for Galeus melastomus, 14% for Alopias vulpinus, 8% for Myliobatidae, and 20% for Squatinidae.
plumbeus; bigeye thresher, Alopias superciliosus; and shortfin mako, we included estimated lengths for these species in our analyses.
norrisi Florida smoothhound Lamniformes Alopiidae Alopias superciliosus Bigeye thresher A.
The only species not represented in catches from both vessels was bigeye thresher, Alopias superciliosus (caught only by the Jonain) (Fig.
of No, of sharks sharks recap- Species tagged tured Nurse shark, Ginglymostoma cirratum 923 101 Sand tiger, Odontaspis taurus 562 31 Bigeye thresher, Alopias superciliosus 329 7 Thresher shark, A.
Sunfish Mola ramsayi -- Sharks and rays Bigeye thresher shark Alopias superciliosus 149 Blacktip shark Carcharhinus limbatus -- Blue shark Prionace glauca 31,503 Bronze whaler Carcharhinus brachyurus -- Crocodile shark Pseudocarcharias kamoharai -- Dog fishes Family Squalidae -- Dusky shark Carcharhinus obscurus -- Grey reef shark Carcharhinus amblyrhynchos -- Hammerhead shark Sphyrna spp.
1997, Reproductive biology of the bigeye thresher shark, Alopias superciliosus (Lowe, 1839)(Chondrichthyes: Alopiidae), in the northwestern Pacific.
paucus Oceanic whitetip shark Carcharhinus longimanus Thresher shark Alopias superciliosus Tiger shark Galeocerdo cuvieri Tunas Bigeye Tuna Thunnus obesus Yellowfin tuna T.