But the question is open, according to Domeier. So how did Nicole know where she was going? And what led her back to the very location off South Africa where she was originally tagged?
The WCS's Bonfil and his colleagues suggest that the sharks, which are known to have eyesight sensitive to dim light, use visual cues, such as the location of the sun or moon, to navigate. Data from Nicole's tag show that she spent more than 60 percent of her time swimming right at the surface. She did frequently dive to great depths—sometimes as deep as 3, feet meters.
Her path, however, was nearly straight. Alternatively, sharks could use Earth's magnetic field to orient themselves, as other animals have been shown to do, Domeier said.
Whatever their method, great white sharks may be navigating dangerous waters. Their newly discovered ocean-crossing ways take the sharks into areas that are less regulated than coastal areas.
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Go Further. Animals Climate change is shrinking many Amazonian birds. Animals Wild Cities This wild African cat has adapted to life in a big city. Animals This frog mysteriously re-evolved a full set of teeth. Animals Wild Cities Wild parakeets have taken a liking to London. Sharks typically cruise around the ocean looking for prey at a leisurely 1. However there are some sharks that are built for speed.
Some of these sharks have record breaking speeds and clock in as fast as cars. So who are these incredibly fast sharks? How fast can they swim? Here is a rundown of the three fastest sharks in the world and why they are able to move so quickly.
The Mako Shark is the fastest shark in the world. It can clock in at speeds of 60 mph 96 mph. The Mako Shark has an extremely streamlined body that is shaped like a torpedo that helps minimize drag as it cruises through the water. It also has a tail designed specifically for propulsion with powerful keels that helps it be an incredibly strong swimmer.
Another biological adaptation that has helped the Mako Shark be the fastest shark in the water is its endothermic body. Endothermic bodies help regulate the warmth of the blood, so its body temperature is usually higher than the surrounding water. Heat is a form of energy so it is able to channel more energy efficiently to its muscle for faster speeds. The Mako Shark is also a constant swimmer, swimming up to 36 miles 60 km a day. Since it is an obligate ram breather, it has to swim in order to get oxygen.
This form of oxygen delivery helps the Mako Shark stay a powerful swimmer. The Mako Shark is such a powerful swimmer, it is capable of jumping out of the water an impressive 30 m 9 ft into the air—a behavior known as breaching. In order to leap this high the Mako Shark has to hit the water at 36 mph 57 kph.
Like every shark, great white sharks feed on other fishes and other aquatic animals. Great white sharks are of the Lamnidea family — fishes of prey or mackerel fish. Young great white sharks begin to fend for themselves immediately after birth, hunting smaller fishes, sharks, and rays. As they grow bigger, they begin to eat large aquatic animals, sharks; their favorite becomes sea mammals especially sea lions and seals.
Great white sharks are fast swimmers, deadly hunters, and very vicious animals. They get to hunt for their prey with their speed, coloring, plenty of teeth, and their sense of smell too.
The record of having more attacks on humans does not mean that great white sharks have humans on their food menu. Their attacks are mostly panic attacks on humans as a result of colorful swimsuits, the smell of blood — in all great white sharks are just sample bitters.
The great white shark can dive to the depth of 1, m 3, ft in the ocean spending most of their lives that deep in the ocean. That is the average depth of the Atlantic Ocean. Great white sharks are built for survival and kill which means they would do anything to achieve this. They stay underneath and hunt prey from that depth of the ocean sneaking up on their prey. Deep diving exposes sharks to colder water so they would be having a good reason before they would be going that deep.
Great white sharks are warm-blooded, to be able to digest food their temperature would have to be above that of the ocean. Human divers begin to experience twice the pressure they felt because of the air on the surface when they dive up to 10 meters of the ocean.
They could sample-bite divers thinking they are seals. However, some are human-friendly, allowing humans to swim with them.
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