Thứ Năm, 26 tháng 1, 2012

Tiger shark

 

The Life of Animals | Tiger shark | The tiger shark is Often found close to the coast, Mainly in tropical and sub-tropical waters throughout the world. Along with the great white shark, Pacific sleeper shark, Greenland shark and sixgill sharks, tiger sharks are the largest extant Among sharks. It tends to stay in deep waters reefs That line, but it does move into channels to pursue prey in shallower waters. A number of tiger sharks can be seen at the Gulf of Mexico, North American beaches and parts of South America.

A recent study showed the average tiger shark That would be recorded at 350 meters (1,100 ft), making it uncommon to see tiger sharks in shallow water. However, tiger sharks in Hawaii have been observed in depths as shallow as 10ft and regularly observed in coastal waters at depths of 20 to 40-ft. The tiger shark is known as tababa in Kiribati and Tuvaluan. Tiger sharks have been observed feeding in the tidal passages of the between the lagoon and ocean in Tarawa, Kiribati. Spring tides bring in plankton or animalcule, the which attract small soft-shell crabs, sardines attract the which, the which attract the gray mullet, the which attract the blue-backed Trevally (rereba), the which then attract the tiger shark (tababa). The tiger shark is an apex predator and has a reputation for eating anything.

It commonly preys upon fish (teleosts), crustaceans, mollusks, dugongs, seabirds, marine seasnakes Mammals (eg bottlenose Dolphins, Spotted Dolphins), and sea turtles (eg green and loggerhead turtles). The broad, heavily calcified jaws and mouth Nearly terminal, combined with robust, serrated teeth, enable the tiger shark to take on these large prey. Due to high risk of predatory attacks, Dolphins Often avoid regions inhabited by tiger sharks. The tiger shark also eats other sharks (Such as sandbar sharks) and Will even eat conspecifics Tiger sharks may also attack injured or ailing whales and prey upon Them.

The tiger shark also scavenges on dead whales. Such in-one documented incident, They were the resource persons observed scavenging on a whale carcass alongside great white sharks, Carcharodon carcharias. The shark circles its prey and studies it by prodding it with its snout When attacking, the shark Often eats its prey whole. This shark typically reaches maturity at lengths of 2 to 3 m (6.6 to 9.8 ft) It is unknown how long tiger sharks live, but They can live longer than 12 years.

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