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Believe it or not, how dolphins can swim so fast has been something of a riddle for researchers since the 1930s. dolphin backgrounds. But a new study has laid to rest one of the most vexing questions plaguing scientists about dolphin speed: How can their muscles produce enough thrust for such high speeds? The results showed that a dolphin’s tail, or fluke, is more than capable of producing enough thrust to speed the mammal through the water. “The flukes are essentially wings,” said Fish. they generate a lift force that is directed forward, on both the upstroke and downstroke.” dolphin backgrounds. This produces the thrust that pushes the dolphin through the water.

The flukes are also flexible, which is key to enabling the dolphin to maintain a highly efficient way of swimming over a broad range of speeds. The dolphin may have the ability to control that flexibility,” Fish explained. dolphin backgrounds. It could be that the fluke becomes stiffer the faster the dolphin swims, increasing its swimming efficiency at high speeds. Or maybe the dolphins can actively control fluke stiffness by changing the tension of tendons in their tail, he said. What is the fastest a dolphin can swim? Near the surface, no more than 54 kilometres per hour. Why? Because it hurts it to swim faster. The other is the formation of microscopic bubbles around the tail, a phenomenon known as “cavitation“. According to Iosilevskii and Weihs, for animals such as dolphins that have nerve endings in their tails, cavitation can be the most important limiting factor. dolphin backgrounds. The bubbles form as a result of the pressure difference created by the movement of the fins. This process is what produces the ribbons of tiny bubbles that stream behind a ship’s propeller

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