The smooth hammerhead - sphyrna zygaena
in Latin - was spotted during a survey of herring stocks in an area of the Celtic Sea by scientists from the Marine Institute based in Galway.
Distribution and movement of scalloped hammerhead Sphyrna lewini and smooth hammerhead Sphyrna zygaena
sharks along the east coast of southern Africa.
Nocturnal trials resulted in a catch that was largely dominated by elasmobranchs; with blue, mako, bigeye thresher, and smooth hammerhead sharks, Sphyrna zygaena
, comprising ~90% of the catch.
In cases of importation of shark species enumerated in CITES, namely sawfish (Pristidae spp), whale shark (Rhincodon typus), great hammerhead (Sphyrna mokarran), scalloped hammerhead (Sphyrna lewini), smooth hammerhead (Sphyrna zygaena
), oceanic whitetip shark (Carcharinus longimanus), porbeagle (lamna nasus), basking shark (Cetorhinus maximus), great white shark (Carcharodon carcharias), and manta rays (Manta spp), an export or re-export certificate from the administrative authority in the exporting country and an import valid certificate issued by the Ministry of Climate Change and Environment must be secured.
Mercury levels in the Smooth Hammerhead Shark Sphyrna zygaena
(Carcharhiniformes: Sphyrnidae) from Northern Peru
Abstract--The smooth hammerhead (Sphyrna zygaena
) is the third most captured shark species in Peru, a nation with one of the largest shark fisheries in the Pacific Ocean.
Mercury and Selenium Bioaccumulation in the Smooth Hammerhead Shark, Sphyrna zygaena
Linnaeus, from the Mexican Pacific Ocean.
lewini ,is caught primarily as by-catch throughout its range (Dulvy et al, 2008), however its fins, together with Sphyrna zygaena
, comprise roughly 49-90 thousand tons in the Chinese fin trade (roughly 5% of the total auctioned fin weight) from an estimated 1.3 to 2.7 million sharks annually (Clarke et al, 2006).
Species that have become sporadic or rare in the Mediterranean Sea include the great white shark, shortfin mako, porbeagle, sandtiger (Carcharias taurus), smooth hammerhead (Sphyrna zygaena
), sandbar shark (Carcharhinus plumbeus), bramble shark (Echinorhinus brucus), and angular roughshark (Oxynotus centrina).
1 1.2 100.0 Sphyrna zygaena
3 -- -- Total sharks 845 -- -- Turtles Caretta caretta 1 -- -- Total turtles 1 -- -- Total overall 2385 -- -- VPUE of retained catch $3869.9 (SD 1870.3) ([euro]2805.5 [SD 1355.9]) Monofilament Group and Species DD CPUE.sub.N] SD Billfish Istiompax indica 0.0 0.0 0.2 Makaira nigricans 0.0 0.1 0.4 Kajikia audax 7.7 0.3 1.0 Istiophorus platypterus 0.0 0.0 0.3 Tetrapturus angustirostris 0.0 0.0 0.3 Xiphias gladius 1.9 12.8 6.1 Total billfish 13.3 6.2 Tuna Thunnus alalunga 0.0 0.2 0.8 Thunnus obesus 14.3 0.2 0.6 Thunnus albacares 9.1 0.3 0.7 Total tuna 0.6 1.3 Other bony fishes Alepisaurus brevirostris 33.3 0.1 0.4 Alepisaurus ferox 64.1 0.9 1.4 Sphyraena spp.