Animal Unique | Smooth Hammerhead Shark | The smooth hammerhead shark (Sphyrna zygaena) is a type of hammerhead shark, family Sphyrnidae, so named because the characteristic shape of the head that is flattened and laterally expanded into a hammer shape (the "cephalofoil") without a notch in the middle of the front edge (hence "smooth"). Unlike other hammerhead sharks, this species prefers temperate waters worldwide and comes in medium latitudes. In summer, these sharks migrate toward the poles next cool water masses, sometimes forming schools numbering in the hundreds to thousands. The second largest hammerhead shark, the smooth hammerhead shark measuring up to 5 m (16 ft) long. It is an active predator that a wide variety of bony fish and invertebrates will, with larger fish also feed on sharks and rays. A relatively common shark is set, consciously or unconsciously, by many commercial fisheries throughout its range, its fins are extremely valuable for use in shark fin soup ..
Taxonomy and phylogeny Smooth Hammerhead Shark
The name was later changed to Sphyrna zygaena. The specific epithet comes from the Greek word zygaena zygon, which means "yoke", referring to the shape of his head. Other common names for this species include common hammerhead, smooth hammerhead sharks common, around the head hammerhead, or just hammerheads. Phylogenetic analysis based on morphology, isozymes and mitochondrial DNA show that the scalloped hammerhead shark (Sphyrna lewini) is the sister species of the smooth hammerhead shark, and that the two of them form a clade with the great hammerhead (S. mokarran).
Distribution and habitat
The name was later changed to Sphyrna zygaena. The specific epithet comes from the Greek word zygaena zygon, which means "yoke", referring to the shape of his head. Other common names for this species include common hammerhead, smooth hammerhead sharks common, around the head hammerhead, or just hammerheads. Phylogenetic analysis based on morphology, isozymes and mitochondrial DNA show that the scalloped hammerhead shark (Sphyrna lewini) is the sister species of the smooth hammerhead shark, and that the two of them form a clade with the great hammerhead (S. mokarran).
Distribution and habitat
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Order: Carcharhiniformes
Family: Sphyrnidae
Genus: Sphyrna
Species: S. zygaena
The hammerhead, smooth hammerhead shark is the most tolerant species in temperate waters, and occurs worldwide at higher latitudes than any other species. Compared with the scalloped hammerhead shark and large, the smooth hammerhead shark remains closer to the surface in water less than 20 m (66 ft) deep. However contained diving to a depth of 200 m (660 ft). It prefers coastal waters such as bays and estuaries, but can sometimes be found in the open ocean on the continental shelf, and around oceanic islands. This shark has also been reported entering freshwater habitats, such as the Indian River in Florida. In summer, smooth hammerhead sharks migrate pole ward to stay in colder water, on the way back to the equator in the winter.
Description Smooth Hammerhead Shark
The second largest next to the great hammerhead shark hammerhead, smooth hammerhead sharks usually measures 2.5 to 3.5 m (8.2 to 11 ft) long with a maximum recorded length and weight of 5 m (16 ft) and 400 kg (880 lb), respectively. The smooth hammerhead shark is distinguished from other large hammerhead sharks in the form of her cephalofoil, a curved front margin, without a notch in the middle .. Each tooth is triangular in shape, with smooth to slightly serrated edges. The body is streamlined, without a dorsal ridge between the two dorsal fins. The dorsal fin is larger than the second dorsal fin, long free rear tip and a strong notch at the rear margin. The dermal teeth are closely packed, each with 5-7 horizontal ridges (3 young people), leading to a W-shaped rear margin.
The second largest next to the great hammerhead shark hammerhead, smooth hammerhead sharks usually measures 2.5 to 3.5 m (8.2 to 11 ft) long with a maximum recorded length and weight of 5 m (16 ft) and 400 kg (880 lb), respectively. The smooth hammerhead shark is distinguished from other large hammerhead sharks in the form of her cephalofoil, a curved front margin, without a notch in the middle .. Each tooth is triangular in shape, with smooth to slightly serrated edges. The body is streamlined, without a dorsal ridge between the two dorsal fins. The dorsal fin is larger than the second dorsal fin, long free rear tip and a strong notch at the rear margin. The dermal teeth are closely packed, each with 5-7 horizontal ridges (3 young people), leading to a W-shaped rear margin.
Adult smooth hammerhead sharks are either solitary or form small groups.
The smooth hammerhead shark is an active-swimming predator that feeds on bony fish, rays, sharks (including its own species), cephalopods, and to a lesser extent crustaceans such as shrimps, crabs and barnacles. Like other hammerhead, smooth hammerhead shark is viviparous: once the young exhaust their supply of yolk, the yolk sac is empty converted into a compound across the placenta, which provides power to the mother. birth takes place between January and March, with ovulation place around the same time. This shark is thought to live 20 years or more.
Human interactions Smooth Hammerhead Shark
The smooth hammerhead shark is potentially dangerous to humans. As of 2008, the International Shark Attack File lists 34 attacks attributed to great hammerhead sharks, 17 of them unprovoked (1 fatal). However, because of the smooth hammerhead shark is born in the temperate regions where people are less likely to go into the water, it was probably responsible for a minority of these attacks. Of Southern California, this species is reported to catch anglers and divers to steal.
The smooth hammerhead shark is an active-swimming predator that feeds on bony fish, rays, sharks (including its own species), cephalopods, and to a lesser extent crustaceans such as shrimps, crabs and barnacles. Like other hammerhead, smooth hammerhead shark is viviparous: once the young exhaust their supply of yolk, the yolk sac is empty converted into a compound across the placenta, which provides power to the mother. birth takes place between January and March, with ovulation place around the same time. This shark is thought to live 20 years or more.
Human interactions Smooth Hammerhead Shark
The smooth hammerhead shark is potentially dangerous to humans. As of 2008, the International Shark Attack File lists 34 attacks attributed to great hammerhead sharks, 17 of them unprovoked (1 fatal). However, because of the smooth hammerhead shark is born in the temperate regions where people are less likely to go into the water, it was probably responsible for a minority of these attacks. Of Southern California, this species is reported to catch anglers and divers to steal.
Glad hammerhead sharks are caught by commercial fisheries around the world, including those from the United States (east and west coasts), Brazil, Spain, Taiwan, the Philippines, south-western Australia and West Africa, mainly using gill nets and lines .. Much more valuable fins, the highest rating for use in shark fin soup and shark fins caught often leads to the sea. Moreover, the liver oil is used for vitamins, skin for leather, and offal for fishmeal. This shark is also used in Chinese medicine.
Smooth hammerhead shark
The smooth hammerhead shark (Sphyrna zygaena) is a type of hammerhead shark, family Sphyrnidae, so named because the characteristic shape of the head that is flattened and laterally expanded into a hammer shape (the "cephalofoil") without a notch in the middle of the front edge (hence "smooth"). Unlike other hammerhead sharks, this species prefers temperate waters worldwide and comes in medium latitudes. In summer, these sharks migrate to the poles next cool water masses, sometimes forming schools numbering in the hundreds to thousands.
Taxonomy and phylogeny Smooth Hammerhead Shark
The name was later changed to Sphyrna zygaena. The specific epithet comes from the Greek word zygaena zygon, which means "yoke", referring to the shape of his head. Other common names for this species include common hammerhead, smooth hammerhead sharks common, around the head hammerhead, or just hammerheads. Phylogenetic analysis based on morphology, isozymes and mitochondrial DNA show that the scalloped hammerhead shark (Sphyrna lewini) is the sister species of the smooth hammerhead shark, and that the two of them form a clade with the great hammerhead (S. mokarran).
Smooth hammerhead shark
The smooth hammerhead shark (Sphyrna zygaena) is a type of hammerhead shark, family Sphyrnidae, so named because the characteristic shape of the head that is flattened and laterally expanded into a hammer shape (the "cephalofoil") without a notch in the middle of the front edge (hence "smooth"). Unlike other hammerhead sharks, this species prefers temperate waters worldwide and comes in medium latitudes. In summer, these sharks migrate to the poles next cool water masses, sometimes forming schools numbering in the hundreds to thousands.
Taxonomy and phylogeny Smooth Hammerhead Shark
The name was later changed to Sphyrna zygaena. The specific epithet comes from the Greek word zygaena zygon, which means "yoke", referring to the shape of his head. Other common names for this species include common hammerhead, smooth hammerhead sharks common, around the head hammerhead, or just hammerheads. Phylogenetic analysis based on morphology, isozymes and mitochondrial DNA show that the scalloped hammerhead shark (Sphyrna lewini) is the sister species of the smooth hammerhead shark, and that the two of them form a clade with the great hammerhead (S. mokarran).
Distribution and habitat Smooth Hammerhead Shark
The hammerhead, smooth hammerhead shark is the most tolerant species in temperate waters, and occurs worldwide at higher latitudes than any other species. Compared with the scalloped hammerhead shark and large, the smooth hammerhead shark remains closer to the surface in water less than 20 m (66 ft) deep. However contained diving to a depth of 200 m (660 ft). It prefers coastal waters such as bays and estuaries, but can sometimes be found in the open ocean on the continental shelf, and around oceanic islands. This shark has also been reported entering freshwater habitats, such as the Indian River in Florida. In summer, smooth hammerhead sharks migrate pole ward to stay in colder water, on the way back to the equator in the winter.
Description Smooth Hammerhead Shark
The second largest next to the great hammerhead shark hammerhead, smooth hammerhead sharks usually measures 2.5 to 3.5 m (8.2 to 11 ft) long with a maximum recorded length and weight of 5 m (16 ft) and 400 kg (880 lb), respectively. The smooth hammerhead shark is distinguished from other large hammerhead sharks in the form of her cephalofoil, a curved front margin, without a notch in the middle .. Each tooth is triangular in shape, with smooth to slightly serrated edges. The body is streamlined, without a dorsal ridge between the two dorsal fins. The dorsal fin is larger than the second dorsal fin, long free rear tip and a strong notch at the rear margin. The dermal teeth are closely packed, each with 5-7 horizontal ridges (3 young people), leading to a W-shaped rear margin.
Adult smooth hammerhead sharks are either solitary or form small groups. The smooth hammerhead shark is an active-swimming predator that feeds on bony fish, rays, sharks (including its own species), cephalopods, and to a lesser extent crustaceans such as shrimps, crabs and barnacles. Like other hammerhead, smooth hammerhead shark is viviparous: once the young exhaust their supply of yolk, the yolk sac is empty converted into a compound across the placenta, which provides power to the mother. birth takes place between January and March, with ovulation place around the same time. This shark is thought to live 20 years or more.
Human interactions Smooth Hammerhead Shark
The smooth hammerhead shark is potentially dangerous to humans. As of 2008, the International Shark Attack File lists 34 attacks attributed to great hammerhead sharks, 17 of them unprovoked (1 fatal). However, because of the smooth hammerhead shark is born in the temperate regions where people are less likely to go into the water, it was probably responsible for a minority of these attacks. Of Southern California, this species is reported to catch anglers and divers to steal.
Many other fisheries every ocean too smooth hammerhead sharks as bycatch, and are caught by recreational fishermen in some songs. Smooth hammerhead sharks are also slain by shark entangled in nets used to protect beaches. Less than 10 smooth hammerhead sharks were caught annually in the nets off KwaZulu-Natal, South Africa, from 1.978 to 1990. In contrast, in the nets in New South Wales, Australia, smooth hammerhead shark is 50% of the sharks from 1972 to 1.990 4715. At present this species is still relatively common and is assessed as "Lower Risk / Near threatened" by the World Conservation Union. From New Zealand, it is a prohibited target species and is the most common sharks along the northwest coast. Nor does it seem to be negatively impacted by fishing on the southern Australia. Off the eastern United States, the catch of this species is regulated by the National Marine Fisheries Service (NMFS) Atlantic Shark Fishery Management Plan (FMP), which is classified as a large Coastal Shark (LCS).
The smooth hammerhead shark is potentially dangerous to humans. As of 2008, the International Shark Attack File lists 34 attacks attributed to great hammerhead sharks, 17 of them unprovoked (1 fatal). However, because of the smooth hammerhead shark is born in the temperate regions where people are less likely to go into the water, it was probably responsible for a minority of these attacks. Of Southern California, this species is reported to catch anglers and divers to steal.
Many other fisheries every ocean too smooth hammerhead sharks as bycatch, and are caught by recreational fishermen in some songs. Smooth hammerhead sharks are also slain by shark entangled in nets used to protect beaches. Less than 10 smooth hammerhead sharks were caught annually in the nets off KwaZulu-Natal, South Africa, from 1.978 to 1990. In contrast, in the nets in New South Wales, Australia, smooth hammerhead shark is 50% of the sharks from 1972 to 1.990 4715. At present this species is still relatively common and is assessed as "Lower Risk / Near threatened" by the World Conservation Union. From New Zealand, it is a prohibited target species and is the most common sharks along the northwest coast. Nor does it seem to be negatively impacted by fishing on the southern Australia. Off the eastern United States, the catch of this species is regulated by the National Marine Fisheries Service (NMFS) Atlantic Shark Fishery Management Plan (FMP), which is classified as a large Coastal Shark (LCS).
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