sand tiger shark scientific name
The caudal fin is elongated with a long upper lobe (i.e. The sand tiger shark is managed by the Highly Migratory Species Fishery Management Plan (FMP). The sand tiger shark is a nocturnal feeder. , Sand tiger sharks are often the targets of scuba divers who wish to observe or photograph these animals. But sand tigers have one unique habit. Other studies indicate sand tiger sharks can be indifferent to divers. The most unambiguous and descriptive English name is probably the South African one, spotted ragged-tooth shark.. in the northern hemisphere and during August–October in the southern hemisphere. In the Autumn they return southwards to give birth in cooler water. Sand tiger sharks have been found to be highly susceptible to developing spinal deformities, with as many as one in every three captive sharks being affected, giving them a hunched appearance. They occasionally hunt in groups, and have even been known to attack full fishing nets. The ICZN approved this name, and today it is used among biologists. Sand tiger sharks are brownish-gray with rust-colored spots on top and white underneath. , The majority of prey items of sand tigers are demersal (i.e. Sand tigers in South Africa and Australia undertake an annual migration that may cover more than 1,000 km (620 mi). Agassiz's name was used until 1961 when three palaeontologists and ichthyologists, W. Tucker, E. I. In 1977, Compagno and Follet challenged the Odontaspis taurus name and substituted Eugomphodus, a somewhat unknown classification, for Odontaspis. The following year, Swiss-American naturalist Jean Louis Rodolphe Agassiz reclassified the shark as Odontaspis cuspidata based on examples of fossilized teeth. The bigeye sand tiger (Odontaspis noronhai) is an extremely rare species of mackerel shark in the family Odontaspididae, with a possible worldwide distribution. 2020 National Geographic Partners, LLC. During pregnancy, the most developed embryo will feed on its siblings, a reproductive strategy known as intrauterine cannibalism i.e. Pratt (2001) (Ref.  In Eastern Australia, the breeding population was estimated to be fewer than 400 reproductively mature animals, a number believed to be too small to sustain a healthy population. free-swimming) rays and skates are also taken. the striped weakfish (Cynoscion guatucupa). This shark is a highly prized food item in the western northern Pacific, off Ghana and off India and Pakistan where they are caught by fishing trawlers, although they are more commonly caught with a fishing line. Adults tend to have reddish-brown spots scattered, mostly on the hind part of the body. front) dorsal fin of the sand tiger is closer to the, This page was last edited on 1 December 2020, at 20:41. Sand tigers are the only shark known to come to the surface and gulp air.  These deformities have been hypothesized to be correlated to both the size and shape of their tank.  The prey items are usually swallowed as three or four chunks.. The sand tiger shark belongs to the order of lamniformes and family of Odontaspididae. The group size of scuba divers was less important in affecting sand tiger behaviour than the distance within which they approached the sharks.  Off North America, it is fished for its hide and fins. Their staple is small fish, but they will eat crustaceans and squid as well. Don’t be fooled by their rows of jagged teeth – these large sharks are generally quite docile, and typically swim calmly around divers. The Sand Shark is also known as the Sand Tiger Shark (US and UK), the Grey Nurse Shark (Australia) and Ragged Tooth Shark (Africa). These surviving embryos continue to feed on a steady supply of unfertilised eggs. Under this FMP, it has been illegal to land (both commercially and recreationally) this species or any parts (fins, meat, jaws, etc) on the Atlantic coast of the U.S. since 1997. However, there are several other differences that are probably more reliable: Adult sand tigers range from 2 m (6.6 ft) to 3.2 m (10.5 ft) in length and 91 kg (201 lb) to 159 kg (351 lb) in weight. Individuals range in size from 6.5 to 10.5 feet in length. The bigeye sand tiger (Odontaspis noronhai) is an extremely rare species of mackerel shark in the family Odontaspididae, with a possible worldwide distribution.A large, bulky species reaching at least 3.6 m (12 ft) in length, the bigeye sand tiger has a long bulbous snout, large orange eyes without nictitating membranes, and a capacious mouth with the narrow teeth prominently exposed. Females reach maturity when approximately 2.2 m (7.2 ft) long at about seven to ten years of age. The Odontaspis Noronhai, also known as the Bigeye Sand Tiger, is a rare pelagic deepwater shark that is sparsely but widely distributed in tropical and warm-temperate waters. front) dorsal fin of the sand tiger is relatively non-symmetric; The first (i.e. The sand tiger shark is a large shark belonging to the family Odontaspididae, which is in the order Lamniformes (mackerel sharks).The scientific name of the sand tiger shark is Carcharias taurus. The sand tiger is categorized as vulnerable on the International Union for Conservation of Nature Red List. Despite this, they are a docile, non-aggressive species, known to attack humans only when bothered first. If she is ready, she swims off with the male, while both partners contort their bodies so that the right clasper of the male enters the cloaca of the female. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft). 20 m (66 ft), where they mate during and just after the winter. This taxonomic classification has been long disputed. Sand tigers reproduce at an unusually low rate, due to the fact that they do not have more than two pups at a time and because they breed only every second or third year. OTHER SETS BY THIS CREATOR. The eyes of the sand tiger shark are small, lacking eyelids. "embryophagy" or, more colorfully, adelphophagy—literally "eating one's brother. SAND TIGERS GULP AIR TO STAY BUOYANT. They store the air in their stomachs, which allows them to float motionless in the water, seeking prey. Shark pups develop a series of teeth as early as their embryo stage. Also, sharks in small, circular tanks often spend most of their time circling along the edges in only one direction, causing asymmetrical stress on their bodies. , Because the sand tiger shark is worldwide in distribution, it has many common names. During the first year, they grow about 27 cm to reach 1.3 m. After that, the growth rate decreases by about 2.5 cm each year until it stabilises at about 7 cm/y. Also known as the Sand Tiger Shark, Grey Nurse Shark, and Spotted Ragged-Tooth Shark. This request was rejected and Odontaspis was approved by the International Code of Zoological Nomenclature (ICZN). The sand tiger shark (Carcharias taurus), also known as the grey nurse shark, spotted ragged-tooth shark, or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It is found in many tropical and temperate regions of the world’s oceans, and is especially common around islands in the central Pacific. Like all sharks, they breathe underwater, through their gills.  Humans affect sand tiger food availability and the sharks, in turn, compete with humans for food that, in turn, has already been heavily exploited by the fisheries industry. " While multiple male sand tigers commonly fertilize a single female, adelphophagy sometimes excludes all but one of them from gaining offspring.  At Cape Cod (USA), juveniles move away from coastal areas when water temperatures decreases below 16 °C and day length decreases to less than 12 h. Juveniles, however, return to their usual summer haunts and as they become mature they start larger migratory movements. After parturition, they swim northwards toward sites where there are suitable rocks or caves, often at a water depth ca. It is also found in the eastern Atlantic Ocean from the Mediterranean Sea to the Canary Islands, at the Cape Verde islands, along the coasts of Senegal and Ghana, and from southern Nigeria to Cameroon. Its body is stout and bulky and its mouth extends beyond the eyes. English language common names include sand tiger shark (US), grey nurse shark (Australia), ground shark, spotted raggedtooth shark (South Africa), slender-tooth shark, spotted sandtiger shark. Firstly, the sand tiger is usually spotted, especially on the hind half of the body. Sand tiger sharks guard many of the shipwrecks in the Graveyard of the Atlantic, patrolling these artificial reefs in search of fish and invertebrates to eat. "Sex- and maturity-based differences in movement and migration patterns of grey nurse shark, "Seasonal residency, habitat use, and site fidelity of juvenile sand tiger sharks Carcharias taurus in a Massachusetts estuary". Although this species is widespread and is not widely fished for food, it has one of the lowest reproduction rates of all sharks and is susceptible to even minimal population pressure. These estuaries are susceptible to non-point source pollution that is harmful to the pups. By swallowing mouthfuls of air at the ocean’s surface, … The scientific name of the shark is Carcharias taurus. , This species is therefore listed as vulnerable on the International Union for Conservation of Nature Red List, and as endangered under Queensland's Nature Conservation Act 1992.  When the sharks become aggressive, they tend to steal fish or bait from fishing lines rather than attack humans. © 1996-2015 National Geographic Society, © 2015-  If the tank is too small, the sharks have to spend more time actively swimming than they would in the wild, where they have space to glide.  This prevented males from approaching from underneath towards their cloaca. Sand tigers roam the surf, sometimes in close proximity to humans, and there have been only a few instances of unprovoked sand tiger shark attacks on humans, usually associated with spear fishing, line fishing, or shark feeding. Shivers (groups) have been observed to hunt large schools of fish. When experts concluded that taurus belongs after Odontaspis, the name was changed to Odontaspis taurus. Often there is more than one male close by with the dominant one remaining close to the female, intimidating others with an aggressive display in which the dominant shark closely follows the tail of the subordinate, forcing the subordinate to accelerate and swim away. Sand tiger sharks are also known as sand tigers and gray nurse sharks. In the scientific community it’s known as the Carcharias Taurus. The sand tiger shark has also been sighted in the Red Sea and may be found as far east as India. They have two large, broad-based grey dorsal fins set back beyond the pectoral fins. The first (i.e.  World War II shipwrecks off the North Carolina coast of North America provide both a habitat for the sharks and the opportunity for close encounters between sharks and divers.. Their diet consists of bony fish, crustaceans, squid, skates and other sharks. The courtship and mating of sand tigers has been best documented from observations in large aquaria. Sand tiger sharks range in length from 6.5 to 10.5 feet (2.0-3.2 m) and may weigh 200 to 350 lbs. "embryophagy" or, more colorfully, adelphophagy—literally "eating one's brother". Baby Sand Tiger Shark: The sand tiger sharks are ovophagous. This behaviour continues for several days during which the male patrols the area around the female. Habitat In the western Indian Ocean, the shark ranges from South Africa to southern Mozambique, but excluding Madagascar. Sand Tiger Sharks: Characteristics Order: Lamniformes Family: Odontaspididae Genus: Carcharias Species: taurus Common Names. In Australia it has been reduced in numbers by spear fishers using poison and where it is now protected.  Stomach content analysis indicates that smaller sand tigers mainly focus on the sea bottom and as they grow larger they start to take more benthic prey. Strong interest of the male is indicated by superficial bites in the anal and pectoral fin areas of the female. Snout and mouth of sand tiger shark, showing protruding teeth and small eyes. The male bites the base of her right pectoral fin, leaving scars that are easily visible afterwards. The tiger shark hunts alone, usually at night. The “sand” portion of its name comes from the shark being seen around shallow waters and close to shore. The dominant male snaps at smaller fish of other species. Because of the life-history characteristics of sharks, conventional fisheries management approaches, such as reaching maximum sustainable yield, may not be sufficient to rebuild depleted shark populations. In the north Atlantic, sand tiger sharks are born about 1 m in length.  The males have grey claspers with white tips located on the underside of their body.  They are normally not expected to reach lengths much over 3 m. In the informal media, such as YouTube, there have been several reports of sand tigers around 5 m long, but none of these have been verified scientifically. Its name is derived from the dark stripes down its body, which fade as the shark matures. Populations are found in many tropical and temperate waters, especially around central Pacific islands. In the Western Atlantic Ocean, it is found in coastal waters around from the Gulf of Maine to Florida, in the northern Gulf of Mexico around the Bahamas and Bermuda, and from southern Brazil to northern Argentina. (91-159 kg). Range Sand tiger sharks are found in shoreline habitats to depths of about 625 feet (190 m).  They are grey with reddish-brown spots on their backs. About the Sand Tiger Shark. Tiger sharks are common in tropical and sub-tropical waters throughout the world. The tiger shark (Galeocerdo cuvier) is one of nature’s largest sharks. Scientific Name: Carcharias taurus Characteristics: This figure shows off the traits that the Sand Tiger Shark is known for: a bulky, stocky body with large fins, and of course a mouth full of exposed sharp teeth! The sand tiger's length can reach 3.2 m (10.5 ft). The sand tiger shark's description as Carcharias taurus by Constantine Rafinesque came from a specimen caught off the coast of Sicily. These sharks give birth only every second or third year, resulting in an overall mean reproductive rate of less than one pup per year, one of the lowest reproductive rates for sharks. The sand tiger shark (Carcharias taurus), grey nurse shark, spotted ragged-tooth shark, or blue-nurse sand tiger is a species of shark that inhabits subtropical and temperate waters worldwide.It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth of around 191 m (627 ft). They range from about 3 to 6 metres (10 to 20 feet) in length and are brown or gray above, paler below. The air ends up in its stomach. Threats to Survival It inhabits the continental shelf, from sandy shorelines, hence its name, and submerged reefs to a depth of around 191 m (627 ft). It is distinguishable by its very high first dorsal fin and interdorsal ridge. Long mouth extending behind eyes. The gestation period is approximately eight to twelve months. For example, the scientific classification of the shortfin mako shark goes like this: Kingdom: Animalia (all animals) Shark Identification 112 Terms. , A recent report from the PEW Charitable Trusts suggests that a new management approach used for large mammals that have suffered population declines could hold promise for sharks. Many taxonomists questioned his change, arguing that there was no significant difference between Odontaspis and Carcharias. In South Africa, the mortality of sand tiger sharks caused a significant decrease in the length of these animals and it was concluded that the shark nets pose a significant threat to this species with its very low reproductive rate Before 2000, these nets snagged about 200 sand tiger sharks per year in South Africa, of which only about 40% survived and were released alive.  As of 2013, the database of Shark Attack Survivors does not list any fatalities due to sand tiger sharks. strongly heterocercal). The male regularly approaches the female in "nosing" behaviour to "smell" the cloaca of the female.  The head is pointy, as opposed to round, while the snout is flattened with a conical shape. During the day, they take shelter near rocks, overhangs, caves and reefs often at relatively shallow depths (<20 m). Twenty-seven years after Rafinesque's original description the German biologists Müller and Henle changed the genus name from C. taurus to Triglochis taurus.  The sand tiger shark has a grey-brown back and pale underside. This is the typical environment where divers encounter sand tigers, hovering just above the bottom in large sandy gutters and caves. All indications show that the world population in sand tigers has been reduced significantly in size since 1980. The following year, Swiss-American naturalist Jean Louis Rodolphe Agassizreclassified the shark as Odontaspis cuspidata based … They are often found in warm or temperate waters throughout … It is a U.S. National Marine Fisheries Service [Species of Concern], which are those species that the U.S. Government's National Oceanic and Atmospheric Administration, National Marine Fisheries Service (NMFS), has some concerns regarding status and threats, but for which insufficient information is available to indicate a need to list the species under the U.S.  Diver activity affects the aggregation, swimming and respiratory behaviour of sharks, but only at short time scales. After one or two minutes, mating is complete and the two separate. Females often mate with more than one male. Twenty-seven years after Rafinesque's original description the German biologists Müller and Henle changed the genus name from C. taurus to Triglochis taurus.  However, at night they leave the shelter and hunt over the ocean bottom, often ranging far from their shelter. 49562) relates Gordon"quot;s (1993) (Ref.  Many sand tigers are caught in shark nets, and then either strangled or taken by fishermen. After mating, they swim further north to even warmer water where gestation takes place.  The upper front teeth are separated from the teeth on the side of the mouth by small intermediate teeth. Great White Shark (Carcharodon carcharias) The scientific name of the great white shark literally … This taxonomic classification has been long disputed. In Oceanworld, Sydney, the females tended to hover just above the sandy bottom ("shielding") when they were receptive.  Thus, overfishing is a major contributor to the population decline. The female responds with superficial biting of the male. In Australia and South Africa, one of the common practices in beach holiday areas is to erect shark nets around the beaches frequently used by swimmers. Mating occurs around the months of August and December They are large-bodied and display a mouthful of sharp teeth that protrude in all directions, even when the mouth is shut. Despite their rows of ragged teeth and vicious appearance, sand tiger sharks are actually rather docile, usually attacking humans only in self-defense. "Reproduction and embryonic development of the sand tiger shark, 10.1577/1548-8659(1994)123<0242:AAGEFT>2.3.CO;2, "Sand Tiger Sharks Are Curious About People", "Ghosts in the Graveyard: N.C. Shark Diving". In Argentina, the prey includes mostly demersal fishes, e.g. They are the only sharks that come to the surface to gulp air, but not to breathe. Divers approaching to within 3 m of sharks affected their behaviour but after the divers had retreated, the sharks resumed normal behaviour.  Females mate only every second or third year. Size and Color:This Sand Tiger Shark figure is 6 ½ inches long and 1 … Despite a fearsome appearance and strong swimming abilities, it is a relatively placid and slow moving animal. This species belongs to the Odontaspididae family.  After mating, the females remain behind, while the males move off to seek other areas to feed, resulting in many observations of sand tiger populations comprising almost exclusively females.  However, as with all large sharks, keeping them in captivity is not without its difficulties.  Off South Africa, sand tigers less than 2 m (6.6 ft) in length prey on fish about a quarter of their own length; however, large sand tigers capture prey up to about half of their own length. The sand tiger is often associated with being vicious or deadly, due to its relatively large size and sharp, protruding teeth that point outward from its jaws; however, these sharks are quite docile, and are not a threat to humans. Sand tiger sharks, also known as gray nurse sharks, have a deceivingly ferocious look. The grey nurse shark, the name used in Australia and the United Kingdom, is the second-most used name for the shark, and in India it is known as blue-nurse sand tiger. Other common names are bacota (Spanish), pintado (Spanish), sarda … Owing to its large size and docile temperament, the sand tiger is commonly displayed in aquariums around the world..  It is also prized as an aquarium exhibit in the United States, Europe, Australia and South Africa because of its docile and hardy nature. Diet Sand tiger sharks' diet consists of bony fishes, smaller sharks, rays, squid, crabs and lobsters. "Correlations of Swimming Patterns with Spinal Deformities in the Sand Tiger Shark, "Critically endangered grey nurse shark mapped for the first time in landmark study", "Considering Shark Biology in Management", The tangled taxonomic history of the sand tiger shark, Species Description of Carcharias taurus at www.shark-references.com, https://en.wikipedia.org/w/index.php?title=Sand_tiger_shark&oldid=991787351, Creative Commons Attribution-ShareAlike License. However, there are unrelated nurse sharks in the family Ginglymostomatidae. The name sand shark comes from their tendency to migrate towards shoreline habitats, and they are often seen swimming around the ocean floor in the surf zone; at times, they come very close to shore. The sand tiger shark has been observed to gather in hunting groups when preying upon large schools of fish. The term "sand tiger shark" actually refers to four different sand tiger shark species in the family Odontaspididae.
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