So experts learned the details of these mammals’ hunting and communication techniques.
US Navy scientists attached cameras to dolphins trained to identify underwater mines and released them into the open sea in San Diego Bay. The mammals spent six months there. Science Alert writes about it.
Six bottlenose dolphins from the US National Marine Mammal Foundation were used for the experiment. With their help, experts learned the details of these mammals’ hunting and communication strategies. Cameras were placed on the back and sides of the dolphins.
“During the hunt, the dolphins click continuously at intervals of 20 to 50 milliseconds. As they approach their prey, the intervals between the clicks are significantly reduced, and eventually become a buzz , and then turned into a scream. Contact with fish is completely accompanied by these sounds until the moment the prey is swallowed,” the scientists said.
Researchers also estimate that in total, the dolphins caught more than two hundred different fish. Most victims are: perch, croaker, halibut, pipefish and smelt.
At the same time, one of the dolphins swallowed eight poisonous yellow-bellied sea snakes, although he did not show any signs of poisoning.
In addition, it is known that during hunting, dolphins use their hearing and vision. And yet – they do not defeat their prey, but use suction for feeding, activating the muscles of the throat, and moving the tongue to the side. So the victim was imprisoned.
Recall that early scientists from the University of Miami discovered that one of the dolphin species living in the Pacific Ocean is divided into several subtypes.
For the first time in science. The killer whale snatched a calf of a round-headed whale
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Source: korrespondent
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