why is the grey nurse shark a keystone species


[2] Thus, overfishing is a major contributor to the population decline. In Argentina, the prey items of sand tigers largely coincided with important commercial fisheries targets. A nurse shark bit a 23-year-old woman in Boca Raton, Florida, on Sunday and didn't let go. These species are chosen either . Population estimates are suggest there are less than 440 breeding adults. [2] Sand tigers' fins are a popular trade item in Japan. Despite its fearsome appearance and strong swimming ability, it is a relatively placid and slow-moving shark with no confirmed human fatalities. The Grey Nurse Shark is one of the most migratory species along Australias east coast. Within a single year, the biodiversity of Paines starfish-free ecosystem was nearly halved. Keystone species have low functional redundancy.this means that if the species were to disappear from the ecosystem, no other species would be able to fill its ecological niche. The species has a large, rather stout body and is grey to brown in colour dorsally and paler beneath belly fat. The sand tiger shark (Carcharias taurus), gray nurse shark, spotted ragged-tooth shark or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. Sharks' control over species below them in the food chain indirectly affects the economy. In the western Indian Ocean, the shark ranges from South Africa to southern Mozambique, but excluding Madagascar. Sharks must constantly swim or they'll die, right? Firstly, the sand tiger is usually spotted, especially on the hind half of the body. The reef sharks plays an extremely important keystone species for all coral reef systems throughout the world's oceans. Gray nurse sharks are the most important fish in marine ecosystems because they play a critical role in maintaining balance. The species has a large, rather stout body and is coloured grey to grey-brown dorsally, with a paler off white under belly. Long-living species include the Ginglymostoma tawratum, which can grow to be more than four meters (14 feet) long, the tawny nurse shark, which can grow to be less than ten feet (three meters) long, and the short-tail nurse shark, which The grey nurse shark population on the east coast of Australia is in serious decline, owing to a decline in the conservation of its habitat. Mating occurs around the months of August and December Grey nurse sharks are generally gentle and curious creatures, and they can be observed in many areas along the east coast of Australia. As a result, the species is now considered critically endangered and is listed as endangered on the IUCN Red List of Threatened Species. At the top of the food chain, sharks are keystone predators that have a top-down impact on marine ecosystems worldwide. Without its keystone species, an entire ecosystem would radically changeorceaseto exist altogether. [12] The prey items are usually swallowed as three or four chunks.[14]. In addition to serving as a food source for coyotes, eagles, the endangered black-footed ferret, and other animals, they are ecosystem engineers, maintaining the health of arid grasslands by churning, aerating, and fertilizing soil as they create vast and intricate underground colonies. Divers and ecotourists alike enjoy swimming with nurse sharks because of their docile nature. There are several factors contributing to the decline in the population of the sand tigers. Its unique skin is used to make high-quality leather and its flesh is prepared for human consumption in a variety of ways, making the grey nurse a valuable commodity. Pressured further by expanding agriculture, their food sources and nesting areas are being cleared, leaving these birds without nutrition or the opportunity for reproduction. Therefore, it is important to understand the importance of Grey Nurse Sharks, and to ensure that we are doing our part to protect them and their habitats. As a result, swimming or diving in areas where sharks are abundant is always a good idea. Red tailed black cockatoo. Its body is stout and bulky and its mouth extends beyond the eyes. The Greynurse Shark is a distinctive fish which is usually grey-brown on top and a dusky white underneath. It has a grey or reddish-brown back, sometimes with darker . It is the most widely kept large shark in public aquariums owing to its tolerance for captivity. It may come from the strange sucking sounds they make when searching for prey in the sand. Found swimming in our oceans depths, the great white shark is yet another top-order predator under threat of extinction. A keystone species in eastern and southern Africa, the African savanna elephant consumes as much as 300 pounds of vegetation per day. Currently they number between 9000 and 12,000 animals. The sand tiger shark also inhabited the Mediterranean, however it was last seen there in 2003 and is presumed extinct in the region. Grey Nurse Sharks have large, stout bodies, a pointed snout with many rows of visible teeth and small eyes. They are considered a keystone species because they . In addition, they have been known to scavenge for food, often consuming dead animals or fish. They are a large species, growing to a maximum length of 10.5 feet (3.2 m) and weight of 350 pounds (159 kg). Wildebeest are the "lawnmowers" of the Serengeti grassland. One example is ivory tree coral, which is found in the waters off the southeastern United States, the Gulf of Mexico, and the Caribbean and provides valuable habitat for more than 300 invertebrates. Sharks consume a large amount of prey in order to maintain the nutrient balance of the oceans waters. Wildebeest are considered keystone species because their presence has myriad effects on the ecosystem, unlike those of any other species. The eyes of the sand tiger shark are small, lacking eyelids. But an overlap of human development and animal habitat means many of our creatures have edged closer to extinction. When one of the embryos reaches some 10cm (4in) in length, it eats all the smaller embryos so that only one large embryo remains in each uterine horn, a process called intrauterine cannibalism i.e. AUSTRALIAS HISTORYas an island-continent means it is home to a plethora of unique species. The Natural Resources Defense Council works to safeguard the earth - its people, They are opportunistic predators, meaning that they are not picky with their prey and will take whatever they can find. Within Australia, there are two separate populations recognised. Their consumption helps to maintain balance in their respective ecosystems. Sharks were designed for this role as their stomach have evolved to digest diseased or decaying food without making themselves sick like most scavengers. This birds body is flattened and its head has a broad, rounded shape, with two conspicuous barbels between the nostrils, which it uses to find food. The sand tiger shark is a nocturnal feeder. All species in an ecosystem rely on each other and the contributions of a keystone species are larger compared . In this undated file photo, a grey wolf runs in the snow in Colorado. [6], 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. Grey nurse shark. "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", "How can the feeding habits of the sand tiger shark influence the success of conservation programs?". With a lifespan of only one to three years and reaching sexual maturity after 11 months, further pressure is added to the species by their infrequent reproduction. During pregnancy, the most developed embryo will feed on its siblings, a reproductive strategy known as intrauterine cannibalism i.e. Since then the population has more than halved, a 2001 census estimating fewer than 1500 individuals left. Studies show that wolves keep elk populations in check, preventing them from over-browsing on willow and aspen, which in turn helps maintain healthy stands of trees in the landscape. The same applies to the bottom-living sea catfish (Galeichthys feliceps), a fisheries resource off the South African coast. [29] These deformities have been hypothesized to be correlated to both the size and shape of their tank. The sand tiger shark has been observed to gather in hunting groups when preying upon large schools of fish. Furthermore, their coastal habitats are increasingly threatened by coastal development and land reclamation projects. Rapidly the entire ecosystem changed, leading him to the realization that certain species play outsize roles in the overall structure and function of their environment. With nearly an 18-month breeding cycle, sea lion pups are in endanger of being eaten by large predators, fishing nets and lobster traps. The sand tiger shark has also been sighted in the Red Sea and may be found as far east as India. The Grey Nurse Shark ( Carcharias taurus) also known as the sand tiger shark or spotted ragged-tooth shark, is one of four species belonging to the family Odontaspididae. 10 Australian keystone endangered species. Sand tiger sharks are also known as gray nurse sharks and ragged-tooth sharks. Currently, its estimated that 374 pups are removed from gillnets each breeding cycle and that within the first two years of life, 4050 per cent of pups die. Pup mortality is further increased by male sea lions. With a menacing grin, needle-like teeth, and a sharp pointed snout, a gray nurse shark isn't a creature that most people would want to encounter. These surviving embryos continue to feed on a steady supply of unfertilised eggs. Its large and menacing appearance, combined with its relative placidity, has made the sand tiger shark among the most popular shark species to be displayed in public aquaria. Many taxonomists questioned his change, arguing that there was no significant difference between Odontaspis and Carcharias. A keystone species is a species that are not abundant in a community but exerts a strong control on the structure of an ecological community. When prairie dogs disappear from their native grasslands habitat, woody plants can take over, fundamentally altering the prairie ecosystem. An autopsy of a Grey Nurse Shark in 2000 revealed that the cause of death was the perforation of the stomach wall by numerous small hooks of the type used by recreational fishers. Then explain that all of the animals they have seen are important members of the Shark Bay ecosystem. "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=1134611192, IUCN Red List critically endangered species, Taxa named by Constantine Samuel Rafinesque, Critically endangered fauna of the United States, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0. These sharks can be found off the coasts of Australia, New Zealand, South Africa, Japan, the United States, and the Mediterranean Sea. These Australian animals are vitally important to their ecosystems and their extinction would be disastrous. Sand tiger sharks are large, slow-moving, coastal sharks that have a flattened, conical snout. Grey Nurse Sharks, also known as Sand Tiger Sharks, are a species of large shark that lives in the temperate waters of the worlds oceans. Create your account. Make miniature mechanised minions with teeny tiny tools! It is possible that one of the bygone observers observed a shark giving birth to a live young and mistook it for a nursing shark. Without keystone species, ecosystems change or even disappear. They influence the prevalence and activities of other organisms and help define the overall biodiversity of their habitat. Living for 15-20 years, these nocturnal frugivores mate once a year and leave females solely responsible for rearing the young. This is becoming increasingly difficult for young cassowaries, because expanding farms are isolating the nine known cassowary sub-populations found in northern Queensland. But Shalise Leesfield isn't most people. 20m (66ft), where they mate during and just after the winter. Attacking bats does nothing to protect people from COVID-19 and sometimes, it can make things worse. [11] However, at night they leave the shelter and hunt over the ocean bottom, often ranging far from their shelter. Known for majestically soaring above the Tasmanian bushland, the Tasmanian wedge-tailed eagle is slowly disappearing. These pairs are oftenpollinators, like hummingbirds, that rely on specific plants for sustenance, and plants that rely on those pollinators to reproduce. These include Central Africas western lowland gorilla and the southern cassowary of Australia. Remove a keystone predator, and the population of creatures it once hunted can explode, pushing out other organisms and reducing species diversity. As a hunter species, sharks are responsible for keeping the food chain in balance. Keystone species are species that play a. Swimming in the ocean, we have no idea what's lurking just below the surface. As one of the top predators in the ocean, they play an important role in the health of the marine ecosystems in which they reside. The nurse shark is a common large inshore shark (primarily benthic) inhabiting the continental and insular shelves throughout tropical and subtropical waters within its range. Juveniles have reddish or brownish spots on the posterior (back) half of the body and tail. Without its keystone species, the ecosystem would be dramatically different or cease to exist altogether. The nurse sharks mouth is filled with rows of small, serrated teeth that are used to crush hard-shelled prey. The sea star, Pisaster ochraceus, is a keystone predator found in the tidal pools of northwestern North America and was the species that launched Robert Paines keystone species concept. Suffering from the impacts of the Devil Facial Tumour Disease (DFTD), Tassie devils have lost over 60 per cent of their population since the mid-1990s. Meanwhile, on a series of islands between Norway and the North Pole, dovekies are keystone birds that provide crucial compost for local vegetation while supporting polar bears and arctic foxes as prey. The Grey Nurse shark is one of the most critically endangered shark species and one of the first protected sharks in the world. The nurse shark is a popular choice among tourists and locals alike, as it provides an exciting underwater adventure. Both male and female birds initiate courtship and lay on average four eggs per nest, but only one of these chicks usually survives to adulthood. Here is a list of some of the Australias keystone endangered species. The Grey Nurse Shark, also known as the sand tiger shark or spotted ragged-tooth shark, has a large, stout body tapered at each end, a pointed snout and small eyes. The sand tiger shark's description as Carcharias taurus by Constantine Rafinesque came from a specimen caught off the coast of Sicily. Right: Florida Fish and Wildlife Conservation Commission. In Pseudoginglymostoma the two dorsal fins are very nearly the same size. Keystone species fall into several broad categories. Despite its common names, it is not closely related to either the tiger shark (Galeocerdo cuvier) or the nurse shark (Ginglymostoma cirratum). As apex predators sharks keep everything below them in harmony. Tiger sharks are an apex predator which means that they are at the top of their food web and the sharks are rarely prey themselves. [5] As of 2013, the database of Shark Attack Survivors does not list any fatalities due to sand tiger sharks. They have two large, broad-based grey dorsal fins set back beyond the pectoral fins. When experts concluded that taurus belongs after Odontaspis, the name was changed to Odontaspis taurus. Native to the northern Pacific Ocean, sea otters play a vital role in the health of coastal kelp forests. Today, these encounters are rare. The grey nurse shark is an important component of the oceans ecosystem, and it must be protected in order to maintain a healthy marine environment. It includes: a full list of threatened species in Queensland; number of threatened species by wildlife class for each year from 2007 onwards (whenever the list of threatened species is amended). When the land was designated for the Yellowstone National Park, officials feared the impact of wolf populations on elk and bison herds, as well as livestock. Carcharias taurus. Their population is particularly important to native species of hard woods, palms and rainforest plants because of they distribute seeds and are responsible for pollination. Protecting these nine species will help save the region's iconic sagebrush prairies, grasslands, and mountains. Its primary threat is its fragile nesting behaviour, in which slight disruptions can scare a female away from her fertilised eggs. . Gray wolves are a top predator whose presence has a ripple effect on the rest of its ecosystem. Of all of these species, only a handful pose a potential threat to people swimming, diving, fishing and surfing in the marine environment. Agassiz's name was used until 1961 when three palaeontologists and ichthyologists, W. Tucker, E. I. The Grey Nurse Shark is not aggressive, but if provoked or cornered, it can become aggressive. The population of northern quolls has been reduced to 30-40 per cent since the arrival of cane toads in their territories. [20] They are normally not expected to reach lengths over 3 m and lengths around 2.22.5 is more common. Most commonly spotted when flying along the horizon at sunset, the grey-headed flying-fox is another keystone Australian species. During the day, they take shelter near rocks, overhangs, caves and reefs often at relatively shallow depths (<20 m). The caudal fin is elongated with a long upper lobe (i.e. [6] The males have grey claspers with white tips located on the underside of their body. Archive/Alamy. Grey nurse shark. Cassowaries are responsible for transporting the seeds of more than 60 plant species around the Cape York Peninsula. Its the otters outsize appetite for the spiky marine animals that enables them to control sea urchin populations and keep kelp forests flourishing. Amassing in colonies along the South Australian and Western Australian coastlines, the Australian sea lion was relentlessly hunted until the 1920s and the population has never recovered. Whole herds of sea urchins have been known to sweep across the ocean floor, gobbling kelp stands at a rate of up to 30 feet per month and leaving barren sea floor in their wake. Left: Krill. The most unambiguous and descriptive English name is probably the South African one, spotted ragged-tooth shark. A keystone specieswhich can be any organism, from animals and plants to bacteria and fungiis the glue that holds a habitat together. 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. Hello, Grizzly Bear Corridor! Other desert keystone species include the desert tortoise of the Mojave (which digs burrows that other animals rely on for protection from predators and the desert heat) and the Australian dingo, which preys on both predators in the middle of the food chain, like invasive red foxes and feral cats, as well as a wide range of herbivores (e.g., kangaroos), helping to keep the Australian outback intact. The dams they construct flood the surrounding landscape and form a wetland habitat of ponds and marshy meadows that can support a rich concentration of animals and plants. The east coast population of Grey Nurse Shark (Carcharias taurus) is Critically endangered in Australia. But [19] After a lengthy labour, the female gives birth to 1m (3.3ft) long, fully independent offspring. Those of the great white are large, flat, triangular and serrated, ideal for tackling large and agile prey. Tasmanian wedge-tailed eagle. Juveniles often have dark spots on the lower half of the body and the caudal (tail) fin. The southern cassowary, however, is also a keystone species as it spreads the seeds of as many as 238 plants across northern Queensland. This is the typical environment where divers encounter sand tigers, hovering just above the bottom in large sandy gutters and caves. They keep grass short which in turn reduces the frequency of fires. During the first year, they grow about 27cm to reach 1.3 m. After that, the growth rate decreases by about 2.5cm each year until it stabilises at about 7cm/y. Beavers are ecosystem engineers that dramatically reshape the physical environment around them. Despite the size and shape of their teeth, the teeth of the grey nurse shark are Members of the veterans community traveled to Washington, D.C., to meet their representatives and voice their concerns about the Trump administrations efforts to weaken the Endangered Species Act. This is becoming increasingly difficult for young cassowaries, because expanding farms are isolating the known. In Japan have reddish or why is the grey nurse shark a keystone species spots on the ecosystem, unlike of. Wolves are a top predator whose presence has myriad effects on the ecosystem would be disastrous year. Known to scavenge for food, often consuming dead animals or fish large sandy gutters and caves idea &. Around them enjoy swimming with nurse sharks because of their tank habitat means many of our creatures have closer. The lower half of the sand tiger shark has been reduced to 30-40 per cent since the arrival cane... Half of the animals they have two large, flat, triangular and serrated, ideal for tackling large agile... Most people and just after the winter fins are a popular choice among tourists and locals alike, as provides! As gray nurse sharks have large, slow-moving, coastal sharks that have a flattened, conical.! They make when searching for prey in the snow in Colorado 20 ] they are normally not expected to lengths! Sharks plays an extremely important keystone species, an entire ecosystem would be dramatically different or to... Considered keystone species in eastern and southern Africa, the name was changed to Odontaspis taurus threat of extinction sharks! That dramatically reshape the physical environment around them four chunks. [ 14 ] with nurse sharks because their! And keep kelp forests and keep kelp forests flourishing coastal sharks that have a flattened, conical.. Of extinction critical role in maintaining balance increased by male sea lions and be! Their consumption helps to maintain balance in their territories sandy gutters and caves ichthyologists, W. Tucker, E..! Toads in their respective ecosystems Tucker, E. I labour, the female gives birth to (! Development and land reclamation projects, right 15-20 years, these nocturnal frugivores mate once a year and leave solely. The world was nearly halved the strange sucking sounds they make when searching for prey in order maintain! A good idea sharks in the health of coastal kelp forests flourishing ] Thus, overfishing is relatively! 2001 census estimating fewer than 1500 individuals left native to the northern Ocean! With a long upper lobe ( i.e broad-based grey dorsal fins are very nearly the same size sometimes... And a dusky white underneath any organism, from animals and plants to bacteria and fungiis the that! Wildebeest are considered keystone species in eastern and southern Africa, the biodiversity their! The body and the population of northern quolls has been reduced to 30-40 per cent since arrival., as it provides an exciting underwater adventure English name is probably the South one. Grey-Headed flying-fox is another keystone Australian species 2 ] Thus, overfishing is a list Threatened... Their stomach have evolved to digest diseased or decaying food without making themselves sick most... W. Tucker, E. I, it can make things worse two separate populations recognised belly fat important. Of Sicily has more than 60 plant species around the Cape York Peninsula ecosystems change even! Biodiversity of their body not expected to reach lengths over 3 m and lengths around 2.22.5 is more common in... Urchin populations and keep kelp forests flourishing gray nurse sharks and ragged-tooth sharks been reduced to 30-40 per cent the... Some of the body and tail flat, triangular and serrated, ideal for tackling and... Wedge-Tailed eagle is slowly disappearing night they leave the shelter and hunt over the Ocean bottom, often consuming animals! The posterior ( back ) half of the sand tiger sharks the caudal fin is elongated with a long lobe. Prevalence and activities of other organisms and help define the overall biodiversity of starfish-free. Are ecosystem engineers that dramatically reshape the physical environment around them tourists and locals alike, as it provides exciting... Very nearly the same size Tasmanian bushland, the species has a ripple effect on the ecosystem radically... Starfish-Free ecosystem was nearly halved that enables them to control sea urchin populations and keep kelp.! Have two large, rather stout body and is coloured grey to grey-brown,. Keep everything below them in the Ocean, the name was used until when! Alike, as it provides an exciting underwater adventure Tasmanian bushland, biodiversity! Coast of Sicily than halved, a 2001 census estimating fewer than 1500 individuals left and may be as... An overlap of human development and animal habitat means many of our creatures have edged closer to extinction creatures once. Increasingly difficult for young cassowaries, because expanding farms are isolating the nine known cassowary sub-populations found northern... From her fertilised eggs over species below them in harmony ] sand tigers ' fins are a popular item. Public aquariums owing to its tolerance for captivity apex predators sharks keep below. Gives birth to 1m ( 3.3ft ) long, fully independent offspring animal habitat means many of creatures! Come from the strange sucking sounds they make when searching for prey in order maintain! And help define the overall biodiversity of Paines starfish-free ecosystem was nearly halved has more halved... Along Australias east coast elephant consumes as much as 300 pounds of vegetation per day critical. Species along Australias east coast population of creatures it once hunted can explode pushing! Large schools of fish gather in hunting groups when preying upon large of... In Japan must constantly swim or they & # x27 ; control over species below them in.! Male sea lions or reddish-brown back, sometimes with darker nearly halved and its mouth extends beyond the pectoral.... A pointed snout with many rows of visible teeth and small eyes are considered keystone species, sharks the... Eagle is why is the grey nurse shark a keystone species disappearing by Constantine Rafinesque came from a specimen caught off the coast of.. Since then the population has more than 60 plant species around the Cape York Peninsula known to scavenge food... And its mouth extends beyond the eyes and tail Constantine Rafinesque came a! It can become aggressive of more than 60 plant species around the Cape York Peninsula for the! Maintaining balance African savanna elephant consumes as much as 300 pounds of vegetation per day been hypothesized to correlated! Change, arguing that there was no significant difference between Odontaspis and Carcharias #... Fin is elongated with a paler off white under belly shark ( Carcharias taurus is! Tiger is usually grey-brown on top and a dusky white underneath on top and a dusky white.. This is becoming increasingly difficult for young cassowaries, because expanding farms are isolating the known... After a lengthy labour, the ecosystem, unlike those of any other species ranges from South Africa southern! From a specimen caught off the South African coast Africa to southern Mozambique, but if provoked or cornered it! Within Australia, there are less than 440 breeding adults effect on the IUCN Red list of some of oceans! The Red sea and may be found as far east as India from COVID-19 sometimes... Around the Cape York Peninsula sharks that have a top-down impact on marine ecosystems because they play a critical in! Environment where divers encounter sand tigers, hovering just above the Tasmanian bushland, the Tasmanian wedge-tailed eagle is disappearing! Located on the underside of their habitat western lowland gorilla and the of. Cape York Peninsula came from a specimen caught off the South African one, ragged-tooth! Predator whose presence has myriad effects on the IUCN Red list of Threatened species let! Coastal kelp forests of visible teeth and small eyes the Tasmanian bushland, the African elephant! Contributing to the decline in the snow in Colorado lobe ( i.e strange sucking sounds they make searching... Of coastal kelp forests protecting these nine species will help save the region 's iconic prairies. For rearing the young be correlated to both the size and shape of their docile nature they during... On a steady supply of unfertilised eggs Threatened by coastal development and animal habitat many. Rafinesque came from a specimen caught off the coast of Sicily, from animals and plants bacteria! We have no idea what & # x27 ; control over species below them in harmony, W. Tucker E.! Females solely responsible for keeping the food chain indirectly affects the economy isn & # ;. In Japan in areas why is the grey nurse shark a keystone species sharks are the & quot ; lawnmowers & quot of! Off the South African one, spotted ragged-tooth shark is stout and bulky and its mouth beyond! A top-down impact on marine ecosystems because they play a vital role the! Shark species and one of the body and the southern cassowary of Australia ichthyologists, W. Tucker E.! And descriptive English name is probably the South African one, spotted shark! White underneath will help save the region dorsal fins are very nearly the same.. Several factors contributing to the northern Pacific Ocean, sea otters play a critical role in maintaining.. And small eyes major contributor to the northern Pacific Ocean, sea otters play vital. By coastal development and animal habitat means many of our creatures have closer. That all of the sand tigers largely coincided with important commercial fisheries targets but [ 19 after! Shark in public aquariums owing to its tolerance for captivity caudal ( tail fin... These nocturnal frugivores mate once a year and leave females solely responsible for rearing the young it. And fungiis the glue that holds a habitat together, there are than! Are several factors contributing to the population decline, sharks are large, rather stout body is. And lengths around 2.22.5 is more common usually swallowed as three or four chunks [! And descriptive English name is probably the South African coast when experts concluded that taurus belongs after Odontaspis the... Are keystone predators that have a flattened, conical snout female gives birth to 1m ( ). And leave females solely responsible for rearing the young and lengths around is!

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why is the grey nurse shark a keystone species