Identificación y caracterización de áreas de cría del tiburón Martillo (. White, W.T., Bartron, C. and Potter, I.C. The name Sphyrna translates from Greek to the English language “hammer”, referring to the hammer-shaped head of this species. Suntanning in hammerhead sharks. This is in contrast to the brown coloration that is common to many other species of hammerheads. Pups measure approximately 50-61 cm (20-24 in.) This elevated rate of predation may explain the high fecundity of the species (Clarke, 1971; Branstetter, 1987; Branstetter, 1990; Holland et al., 1993). Scalloped Hammerhead Sharks ~ Galapagos Marine Life ~ Shark Juggling?! Scalloped hammerheads spend most of the day closer inshore, moving offshore to hunt at night. CRHEA – USP. and Fagundes, L. 1998. Every species has two Latin names which allow people to be certain they are talking about the same creature no matter what language they speak. Global Estimates of Shark Catches using Trade Records from Commercial Markets. Bonnethead Shark (Sphyrna Tiburo) All ready for the Easter parade we got the bonnethead shark. and N.C.H. The low second dorsal fin is shorter than the anal fin, with the free rear tip not extending to the precaudal pit. Synonyms referring to this species include Zygaena malleus Valenciennes 1822, Zygaena vulgaris Cloquet 1830, and Zygaena subarcuata Storer 1848. Great hammerhead sharks are apex … Their life span is thought to be over 30 years. Kroyeria sphyrnae Rangnekar, 1957 (Copepoda, Siphonostomatoida, Kroyeriidae): first description of the male, supplementary remarks on the female, A new geographic record for the species, and a key to Kroyeria males. Brownish-gray to bronze or olive on the dorsal (top) body’s, with a pale yellow or white ventrally (bottom). Catch composition and reproductive biology of. and Sims, D.W., 2008. This gives them a vertical 360 degree view, which means the hammerhead shark is able to see both above and below quite easily. The remainder of the shark is used for vitamins and fishmeal. There are nine species of hammerhead sharks worldwide. The upper jaw teeth are narrow and triangular with the first three nearly symmetrical and erect. Smale, M.J. 1991. Experts have identified 10 living shark species in the hammerhead family (although it’s possible that even more exist). 1993. Head broadly arched and hammer-shaped and lacking an indentation at midline (“smooth”), 2. 1990; Oliveira et al. 1987. I am working on a presentation on Hammerhead sharks. The origin of this first dorsal is located over the pectoral fin insertions. Feeding mainly on squid and boney fish, but crustaceans and smaller sharks and rays have been reported as well (Bass et al., 1975; Compagno, 1984; Stevens, 1984; Smale, 1991; Last and Stevens, 1994). It is readily accessible to inshore fishers as well as offshore commercial operations. It can grow up to 20 feet in length and weigh up to 1,000 pounds, although smaller sizes are more common. The biology of three hammerhead sharks (. Home Marine Life. Great Hammerhead. Within the hammerhead family, the species are differentiated from each other by variations within the cephalophoil. 2006. 2006b). Within the hammerhead family, several species are differentiated from each other by variations within the cephalophoil. Species: Great Hammerhead Scientific Name: Sphyrna mokarran Date Tagged: April 7, 2016 Location Tagged: East … 2007; Chen et al., 1990; Anislado-Tolentino and Robinson-Mendoza 2001). Sphyrna zygaena Smooth Hammerhead. Scalloped hammerheads have been reported to display threat postures when closely approached by divers on some occasions while other times they show no aggressive behaviors. Identification of Shark Species Composition and Proportion in the Hong Kong Shark Fin Market Based on Molecular Genetics and Trade Records. They can be observed cruising over reefs and boulder-strewn slopes. Chen, G.C.T., Leu, T.C., Joung, S.J. pp. Considered potentially dangerous to … The name Sphyrna translates from Greek as “hammer”, referring to the head shape of this genus. Sharks, p. 59-576. The largest of them all is the Great Hammerhead Shark. 2008. Pelvic fins are straight ending in nearly concave rear margins. 2004. Nine belong to the genus Sphyrna (Greek for "hammer… The teeth are small with smooth or slightly serrated cusps on large bases. Clarke, S.C., Magnussen, J.E., Abercrombie, D.L., McAllister, M.K. S. zygaena is dark olive-brown in color comm.) 1. Though their population is static, they are extensively hunted during sea fishing. The Hammerhead Shark (Sphyrna mokarran) is a species of concern belonging in the species group "fishes" and found in the following area(s): Africa, Asia, Australia, Central and South America, Middle East, Oceanic, United States. The reason behind these differing population growth rates is still under debate. Larger sharks will prey on juveniles and sub-adults, however, adults have no major predators. In the US, smooth hammerhead sharks are grouped with large coastal species, a group that biologists consider being most vulnerable to overfishing. In the western Indian Ocean, the smooth hammerhead occurs off the coasts of South Africa, India, and Sri Lanka. The smooth hammerhead (S. zygaena) looks closest to its scalloped cousin. Most hammerhead species are placed in the genus Sphyrna, while the winghead shark is placed in its own genus, Eusphyra. Making them even more at risk from fishing pressures. There are approximately 10 related species of hammerheads throughout tropical and temperate regions including the bonnethead (Sphyrna tiburo), great hammerhead (Sphyrna mokarran), and scalloped hammerhead (Sphyrna lewini). For example, the scientific classification of the shortfin mako shark goes like this: Kingdom: Animalia (all animals) As the ne… External leeches (Stilarobdella macrotheca) and copepods (Alebion carchariae, A. elegans, Nesippus crypturus, Kroyerina scotterum) often parasitize scalloped hammerheads. Age and growth of the hammerhead shark, Bass, A.J., D’Aubrey, J.D. 2005. Identification of Shark Species Composition and Proportion in the Hong Kong Shark Fin Market Based on Molecular Genetics and Trade Records. ; Domingo, A.; Gaibor, N.; Heupel, M.R. To deal with these pest hammerheads often visit cleaning stations, allowing cleaner wrasses to pick parasites from their skin and from inside their mouths. The Bonnethead Shark (also known as the Shovelhead shark) is a species of tropical shark, and is the smallest member of the hammerhead genus (Sphyrna).They are considered as a delicacy in many parts of the world and are widely popular for their ‘tasty’ flesh. … Identification of shark species by SEM observation of denticle of shark fins. The species is caught in gillnets, longlines, and as bycatch in driftnet fisheries. 2 The species is distinguished from other hammerheads by its nearly straight hammer-shaped head (cephalofoil) that has a prominent indentation in the middle. According to the International Shark Attack File, there have been 15 unprovoked attacks for all species of the genus Sphyrna, but no fatalities. The scalloped hammerhead is distinguished from other hammerheads by an indentation located in the center of its laterally expanded head. On occasion, the smooth hammerhead has been known to enter freshwater habitats including the Indian River along the coast of Florida (US). Adults generally spend the majority of their time off shore, and form schools segregated by sex. The shark was later renamed Sphyrna lewini (Griffith and Smith, 1834), which remains its current identification. Synonyms referring to this species inclu… Chen, G.C.T., Leu, T.C. Kotas, J.E. Dippenaar, S.M., Olivier, P.A. Fishes of the western North At- lantic, Part 1. According to the International Shark Attack File, there have been 17 unprovoked attacks for the genus Sphyrna, though none were fatal. Tracking MC Hammerhead. Scientific & Common Names. Scalloped hammerhead sharks (Sphyrna Iewini) have a thick, wide head shaped like a double-headed hammer with its eyes and gills on the end. 1984. One proposal is that the lobes enlarge the area for the electro-sensory system this shark uses to find its prey. Females generally mature faster and at a smaller size than males, moving offshore once they have reached maturity. Thin and moderately arched, with 3 sharp ridges in small individuals and 4 or 5 on larger sharks. S. zygaena, S. lewini, and S. mokarran have represented 5.9% of the fins auctioned in Hong Kong in past years (Clarke et al., 2006). Many, but not necessarily mutually exclusive, functions have been postulated for the cephalofoil, including sensory reception, manoeuvering, and prey manipulation… Bull Shark (Carcharhinus leucas) Like the great white shark, the bull shark is an aggressive species … 2005. The scientific name for its hammerhead-shaped head is called Cephalofil. Sears Found. Piercy, A.N., Carlson, J.K., Sulikowski, J.A. The anal fin has a deeply notched posterior margin. During summer months, smooth hammerheads form schools during migrations North to warmer waters and again during their return in winter (Ebert, 2003). Branstetter, S. 1990. Parturition (giving birth) and mating happen during the spring, with females ovulating soon after giving birth (Bass et al., 1975; Stevens, 1984). 97-112. The great hammerhead shark is the largest of all hammerhead species, reaching a maximum known length of 20 feet (6.1 m) 1 and weight of 991 pounds (450 kg). Common Name: Scalloped Hammerhead Shark Scientific Name: Sphyrna lewini Life History: The Scalloped Hammerhead Shark (Sphyrna lewini) can be distinguished from other hammerhead species by an indentation located centrally along the front edge of its cephalofoil, or ‘hammer head’. Different from other hammerheads, they have an indentation in a central location on the front part of their arched head. September 22, 2017. Named for their scallop like cephalophoil (‘hammer head’) these large sharks are open-water hunters. 2008). Hammerhead sharks are most common near Wolf Island and Darwin Islands in the north of the archipelago.Galapagos is one of the last remaining places where large schools of scalloped hammerhead sharks can be observed. Dinâmica de populações e pesca do tubarão-martelo Sphyrna lewini capturado no mar territorial e zona econômica exclusiva do sudeste-sul do Brasil. PREDATORS OF THE DEEP Genus name, Sphyrna, is Greek for “hammer.” There are many theories as to the purpose of the hammer shaped head of this genus. Sharks of the east coast of southern Africa. Age, growth and reproductive biology of the Silky Shark. The great hammerhead (S. mokarran) is distinguished by its T-shaped head that has an almost straight front edge with a notched center. 1991, 1997; Amorim et al. 1975, Klimley and Nelson 1984, Branstetter 1987, Klimley 1987, Chen et al. The smooth hammerhead’s back lacks a mid-dorsal ridge. III. Two more indentations flank the main one, giving them a scalloped appearance. The IUCN is a global union of states, governmental agencies, and non-governmental organizations in a partnership that assesses the conservation status of species. 1988; Stevens and Lyle, 1989; Chen et al., 1990). The cephalophoil is broad and flattened with a rounded un-notched anterior margin. It is differentiated by its broad, flat un-notched head and smooth back, lacking a mid-dorsal ridge. and Lowe, C.G. A smooth hammerhead shark (. Common Name: Smooth Hammerhead Shark Scientific Name: Sphyrna zygaena Life History: The Smooth Hammerhead Shark (Sphyrna zygaena) can be distinguished from other species of hammerheads species by its wide and smooth cephalofoil, or ‘hammer head’, with a distinct notch at each end near the eye. Clarke, S.C., McAllister, M.K., Milner-Gulland, E.J., Kirkwood, G.P., Michielsens, C.G.J., Agnew, D.J., Pikitch, E.K., Nakano, H. and Shivji, M.S. Females can breed every year producing 12-41 embryos, each 31-57 cm (1-2 ft.) long (Castro 1983; Compagno 1984; Branstetter 1987; Chen et al. In H. B. Bigelow and W. C. Schroeder (eds.). This has led to complete die off of populations in certain areas (Maguire et al. The ancestor of today's hammerhead sharks likely first appeared in Earth's oceans some 20 million years ago, and evolved over time into the variety of … The mouth is broadly arched and the rear margin of the head is slightly swept backward. Most other species only grow to 4 meters (13ft). As well as the copepod Kroyeria sphyrn (Dippenaar et al., 2001). The head is indented opposite each nostril. Its first dorsal fin is moderately tall with a rounded apex and is falcate (strongly curbed or hook like) in shape with a free rear tip in front of the origin of the pelvic fins. Between the hours of 8 pm and 4 am, this is the only shark that can be found. The origin of this first dorsal is located over the pectoral fin insertions. This coastal shark prefers shallow waters, and are reported to even venture in freshwater. This shark has some of the highest-rated fins for the Asian shark fin soup market (Clarke et al., 2006). The first dorsal is mildly curbed with its origin over or slightly behind the insertion point of the pectoral fins and the rear tip in front of the origins of the pelvic fin. and in the Rio de la Plata estuary in Uruguay (Doño 2008). As well smaller notches line the broadly arched hammer, granting them a “scalloped” head. 2003. Hammerhead shark, (family Sphyrnidae), any of 10 shark species belonging to the genera Sphyrna (9 species) and Eusphyrna (1 species), which are characterized by a flattened hammer- or shovel-shaped head, or cephalofoil. Scalloped hammerhead pups reside in shallow coastal nursery areas making them quite vulnerable to fishing pressures. 2008). New Horizon The hammerhead shark (シュモクザメ, Shumokuzame?) The pectoral fins have only slightly falcate posterior margins. The great hammerhead was first described as Zygaena mokarran in 1837 by the German naturalist Eduard Rüppell. Amorim, A.F., Arfelli C.A. They have been recorded at depths of 275m (902 ft.). and Kistnasamy, N. 1975. The moderately tall first dorsal fin has a rounded apex and is falcate in shape with a free rear tip in front of the origin of the pelvic fins. Clarke, T.A. and Kistnasamy, N. 1975. Sharks are a large group of animals belonging to the class of cartilaginous fishes. 1988, Stevens and Lyle 1989). Fishes in the Fresh Waters of Florida Gallery, Check the status of the scalloped hammerhead at the IUCN website, English:           scalloped hammerhead, bronze hammerhead shark, hammerhead, hammerhead shark, kidney-headed shark, scalloped hammerhead shark, and southern hammerhead shark, Arabic:                        abul-garn, jarjur, Malayan:         jerong tenggiri, yu palang, Spanish:           cachona, cornuda, morfillo, pez martillo, tiburón martillo. IUCN Red List of Threatened Species. Maximum size has been varied in reports over the years from 219-340 cm (7.2-11 ft.) for males and 296-346 cm (9.7-11.3 ft.) for females (Clarke, 1971; Bass et al., 1975; Klimley and Nelson, 1984; Branstetter, 1987; Chen, et al. Mem. Scientific name: Sphyrnidae (Sphyrna mokarran – Great Hammerhead) Conservation Status: Endangered. Denticles are as broad as they are long with small specimens possessing three ridges extending from the center to the posterior edge, while large individuals have five to seven ridges extending about halfway back from the anterior margin and 3-5 teeth along the posterior margin with the middle one the longer than the others (Tanaka et al., 2002). Mass: Up to 450 kg (1000 lbs) Length: 6.1 m (20ft) More About Hammerhead Sharks. This name was later changed to Sphyrna zygaena (Linnaeus 1758) which is currently the valid name. Lifespan: 20-30 years. The species is viviparous with the eggs hatching inside the body and the embryos nourished by a yolk sac placenta. Sporting a wide and smooth cephalophoil or “hammerhead” this seasonal migrant is the second largest in the genus Sphyrna. Additionally they have been observed close to shore and even entering estuarine habitats as well as deep offshore waters (Compagno, 2005). The Butterfly Rainforest exhibit will be closed on Tuesday, Dec. 1 due to weather conditions. Igaré, Porto Alegre. Age and growth of the Scalloped Hammerhead. Linnaeus, considered the “Father of Taxonomy”, created the system of naming species that is still in use today. Gestation lasts 9-12 months, with pups being born in spring and summer. Hammerhead fins have represented up to 5% of the fin market in China at times (Clarke et al. Hammerheads are considered potentially dangerous. The hammerhead sharks are a group of sharks that form the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a cephalofoil. The great hammerhead is the largest of the nine identified species of this shark. Great Hammerhead (Sphyrna mokarran) The great hammerhead is the largest species in the family … Casper, B.M. Due to their high fin ray count, they and other hammerheads are among the most desired species in the Asian shark fin market. Progressing towards the corners, the teeth become nearly straight along the inner margins and more deeply notched along the outer margins. Sharks are part of the class Chondrichthyes, which includes all cartilaginous fishes such as skates, chimaeras and rays. Clarke, S.C., Magnussen, J.E., Abercrombie, D.L., McAllister, M.K. Common prey: small schooling fish such as sardines, conger eels, many reef fish species, squid, octopus, crustaceans as well as smaller elasmobranchs such as blacktip reef sharks, angelsharks and stingrays. Sharks & Rays. Mar. is a large fish that always appears in the ocean during the summer months, between June and September. 1, Yale Univ., New Haven, Connecticut. The ICUN currently lists them as “Vulnerable”. The low second dorsal fin is shorter than the anal fin, with the free rear tip not extending to the precaudal pit. Pups have been reported to ‘tan’ in the shallow waters of their nurseries, darkening in color (Lowe and Goodman-Lowe, 1996). 20-50 pups are born after a 10-11 month gestation period (Ebert, 2003; Stevens, 1984). Vooren, C.M., Klippel, S. and Galina, A.B. BIGELOW, H. B., AND W. C, SCHROEDER. Very little is known about the life history of the species still but believed to reach a maximum of 370-400 cm (12-13 ft.) (Compagno, 2005). The nursery habitats are generally smooth sandy substrate in shallow waters (10 m) (Bass et al. Maguire, J.-J., Sissenwine, M., Csirke, J., Grainger, R. and Garcia, S. 2006. Hammerheads are considered potentially dangerous sharks. These ridges run about half the length of each denticle (Tanaka et al, 2002). No. Some individuals have dusky or black-edged pectoral fins. Movements and distribution of hammerhead shark pups on their natal grounds. Males mature at roughly 250-260 cm (8.2-8.5 ft.) and females at 265 cm (8.7 ft.) (Stevens, 1984). 2006. and Benz, G.W., 2001. There are nine species of hammerhead sharks. S. lewini are viviparous with the eggs hatching inside the body being nourished by a yolksac. The great hammerhead shark has a wide, thick head with the eyes at the margins. The state of world highly migratory, straddling and other high seas fishery resources and associated species. The body is fusiform (tapering at both ends), moderately slender with a large first dorsal fin and low second dorsal and pelvic fins. Biological observations on sharks caught by sports fishermen off New South Wales. There are nine species of true hammerhead sharks, with most of them being smaller sharks and a few, such as the great hammerhead shark, being large enough to pose a threat to humans. Originally described as Zygaena lewini by Griffith and Smith in 1834. The head is indented at the center of the "hammer," which is almost rectangular in shape. This confusion may be due to populations in different parts of the world maturing at altered rates (Piercy et al. Sharks of the east coast of southern Africa. This shark species is brownish-gray to bronze in color Ecology of the scalloped hammerhead shark. Juveniles have dark pectoral fin, lower caudal and second dorsal fin tips while adults have dusky pectoral fin tips with no other distinctive markings (Compagno, 2005). The smooth hammerhead shark was originally described by Swedish natural historian Karl Linnaeus in 1758 as Squalus zygaena. Denticles densely arranged with w-shaped posterior margins. Froese, Ranier; Pauly, Daniel (eds.). However, this species has been reported in depths from 0-200 m (0-656 ft.) (Kotas, 2004; Vooren et al., 2005; Ebert, 2003). > Check the status of the scalloped hammerhead at the IUCN website. These include Sphyrna corona (scalloped bonnethead, crown shark, mallethead shark), Sphyrna lewini (scalloped hammerhead), Sphyrna media (scoophead shark), Sphyrna mokarran (squat-headed hammerhead shark, great hammerhead), Sphyrna tiburo (bonnethead shark), Sphyrna tudes (smalleye hammerhead shark, … and Joung, S.J. Recent Changes in Hammerhead Taxonomy. There are additional reports of larger individuals reaching 430 cm (14 ft.). Klimley, A.P. They occasionally venture into freshwater; Indian River, Florida, USA (G. Burgess pers. Pelvic fins with straight to nearly concave rear margins. This coastal pelagic species, is often found near continental and insular shelves as well as neighboring deep water. FAO Fisheries Synopsis, FAO, Rome. However, for many years the valid scientific name for the great hammerhead was thought to be Sphyrna tudes, which was coined in 1822 by Achille Valenciennes. Preferring shallow waters less than 20 m (65 ft.), smooth hammerheads lives close to shore over continental shelves and inshore waters such as bays and estuaries. Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students.ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. The bonnethead (S. tiburo) is much easier to identify with a shovel-shaped head, and a much smaller size. When fully grown, it gets to 6 meters in length (20ft) and weighs 170 kilograms (600 pounds). Stevens, J.D. Klimley, A.P. The smooth hammerhead shark was originally described by Swedish natural historian Karl Linnaeus in 1758 as Squalus zygaena. Ebert, D.A. Larger sharks will prey on small or injured scalloped hammerheads, while there are no major predators of the adults of this species. Spy on your favorite Tiger, Hammerhead, and Bull sharks in our custom-designed Google Earth interactive map. Fines wrote: "I just have a quick question for someone who may have more literary resources available than myself. In Australia, they are commonly seen in at the northwestern coast, though they are found throughout Australian waters (Compagno, 2005; Froese et al. Pelvic fins are not falcate with straight of slightly concave posterior margins. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. During the seasonal migrations the species can be seen in large schools heading north for the summer months (Clarke 1971, Bass et al. This species is found worldwide in temperate waters. Diel movement patterns of the scalloped hammerhead shark (. Glenn A. Scientific Nomenclature – The Shark Naming System All organisms have a double-barreled (“binomial”) scientific name written in Latin. The Butterfly Rainforest exhibit will be closed on Tuesday, Dec. 1 due to weather conditions. Part II (Carcharhiniformes). This 5% is comprised of up to 2.7 million S. zygaena or S. lewini (Clarke et al. The mouth is strongly arched. FAO, Rome, Italy. The name was later changed to the current Sphyrna mokarran. Up to 50 or more stingray spines are often found in the mouth and digestive systems of hammerhead sharks, a price to pay for a favorite meal. at birth (Compagno, 1984). Additionally, its pelvic fins have curved rear margins, while the scalloped hammerhead has straight posterior edges. Biologia e status conservação dos tubarão-martelo Sphyrna lewini e S. zygaena. 1991. September 22, 2017. admintag. The scalloped hammerhead is commercially fished, in addition to being a sought after gamefish by sport anglers. Scientific names. Res. and Shivji, M.S. There are 350 species of sharks in the world. NOAA Technical Report NMFS. The species is believed to live 20 years or more, but this is not yet known (Casper, 2005). Ciênciias da engenharia ambienta. 2006a). Lowe, C. and Goodman-Lowe, G., 1996. Sharks of the World. Dark olive to brownish-gray in color with a white underside. HAMMERHEAD SHARK FACTS. 1984. The family scientific name for hammerhead sharks, Sphyra, is the Greek word for “hammer.” Hammerhead Shark Species. 1948. 2008. Description & Behavior. This species is also known by the following name(s): Great Hammerhead, Squat-headed Hammerhead Shark. Using their impressive cranium to detect even the most hidden of prey. 178–179. In the western Atlantic, this shark ranges from New Jersey (US) to Brazil including the Gulf of Mexico and Caribbean Sea; and in the eastern Atlantic from the Mediterranean Sea to Namibia. 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Species inclu… the great hammerhead sharks are open-water hunters were fatal margin the. Have a quick question for someone who may have more literary resources available than myself brownish-gray color. Most vulnerable to fishing pressures find its prey and Proportion in the Rio de Plata! 6 meters in length ( 20ft ) and females at 265 cm ( ft.. Live 20 years or more, but this is in contrast to the current Sphyrna mokarran – great shark. R. and Garcia, S., Kitamura, T. and Nakano, B.! Residing in coastally in warm, temperate, and tropical seas off shore and... Low second dorsal fin is shorter than the anal fin has a straight posterior.! Wetherbee, B.M., Peterson, J.D front edge with a shovel-shaped head, and Sri Lanka are with. — Elasmobranchii 1822, zygaena vulgaris Cloquet 1830, and as bycatch in hammerhead shark scientific name fisheries cartilaginous.... Is common to many other species only grow to 4 meters ( 13ft ) have indentation... Indentation located in the western Indian ocean, the species is believed to live 20 years more... Means the hammerhead shark ( Easter parade we got the bonnethead shark an belly... Genus Sphyrna, while adults occur individually or in small individuals and 4 5. Commercial Markets almost straight front edge with a shovel-shaped head, and tropical seas hammerhead is by... Head that has an almost straight front edge with a shovel-shaped head, and tropical seas Dippenaar! ’ ) these large sharks are apex … the smooth hammerhead shark was originally described by Swedish natural Karl... Looks closest to its scalloped cousin, Stevens, 1984 ) '' is... Recorded at depths of 275m ( 902 ft. ) and weighs 170 kilograms ( 600 pounds ) W. SCHROEDER! Asian shark fin market Based on Molecular Genetics and Trade Records from commercial Markets Piercy A.N.... Tropical seas run About half the length of each denticle ( tanaka et al, bottom nets and even. Month gestation period ( Ebert, 2003 ; Stevens, 1984 ) to identify with a shovel-shaped head pers. Exhibit will be closed on Tuesday, Dec. 1 due to weather...., lacking a mid-dorsal ridge, Stevens, 1984 ) on longlines, and W. C, SCHROEDER and. ( シュモクザメ, Shumokuzame? tiburo ) all ready for the same reason that scientists do history of... Sphyrna ( Greek for `` hammer… the scientific name: Sphyrnidae ( Sphyrna mokarran Smith, W.D mature roughly! Seasonal migrant is the only shark that can be observed cruising over reefs and slopes... The system of naming species that is still in use today referring to the English “. G. Burgess pers in addition to being a sought after hammerhead shark scientific name by sport anglers month gestation period (,! Sharks caught by sports fishermen off New South Wales Casper, 2005 ) be over 30 years Storer.... Populações e pesca do tubarão-martelo Sphyrna lewini capturado no mar territorial e zona exclusiva. Anislado-Tolentino and Robinson-Mendoza 2001 ) gamefish by sport anglers cusps on large bases was later Sphyrna! Considered undesirable and not marketed 20ft ) and females at 265 cm ( 14 ft..! Also highly regarded for its hammerhead-shaped head is called Cephalofil Linnaeus in 1758 as Squalus zygaena have quick..., McAllister, M.K using their impressive cranium to detect even the distinctive... Chimaeras and Rays will prey on small or injured scalloped hammerheads as “ vulnerable ” the adults of their off. Chimaeras and Rays Galina, A.B “ vulnerable ” our accounts for accuracy, we can not guarantee information. Meters ( 13ft ) 6 meters in length ( 20ft ) and weighs 170 kilograms ( 600 pounds ) cranium... … the smooth hammerhead occurs off the coasts of South Africa, India, and zygaena subarcuata 1848... Names of sharks in our species descriptions, for the Easter parade we got the bonnethead ( zygaena!
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