Do dolphins hunt with ultrasound? Whether the dolphin emits ultrasound or infrasound

With sonar, to be exact, and the same goes for bats. The principle of sonar is that the dolphin emits a high-frequency, high-soundwave clicking sound, and the sound hits the edible fish and returns, and the dolphin receives the reflected sound to hunt according to the direction. But scientists still don't know why dolphins can distinguish the sounds reflected by different fish.

That's right, this is called sonar, and scientists use sonar to detect the depth.

Bats use echolocation, scientists use this feature to make radar, which imitates some structures and functions of organisms to invent and create various instruments and equipment, which is called "bionic".

Hehe. It's all about biology and physics, and I'd like to thank you!

Both waves are present.

Dolphins can vocalize at two frequencies: ultrasound waves with frequencies of more than 200 to 300 kHz, which are used to detect the presence of bait or obstacles in noisy water;

Another kind of infrasound wave: it is a low-frequency sound made by dolphins that people can hear in the water, which is used for communication between companions, and belongs to the "language" of dolphins.

Dolphins have morphological traits typical of toothed cetaceans: a spindle-shaped body; a single crescent-shaped breathing hole; skull intussusception, with the maxilla expanding posteriorly and overlapping the frontal bone; left-sided asymmetry of the cranial parietal; conical or nail-shaped teeth, etc.

There are two types of cherry blossom waves.

The sea and the dolphin can vocalize at two frequencies: one is ultrasound with a frequency of more than 200 to 300 kHz, which is used to detect the presence of bait or obstacles in the water;

Another type of infrasound: it is a low-frequency sound made by dolphins that can be heard in the water, which is used for communication between peers and belongs to the "language" of dolphins.

Dolphins have morphological traits typical of toothed cetaceans: a spindle-shaped body; a single crescent-shaped breathing hole; skull intussusception, superior hall jaw extending posteriorly and overlapping frontal bone; left-sided asymmetry of the cranial parietal; conical or nail-shaped teeth, etc.

Researchers in the United States have found that dolphins living off the coast of Florida are very particular about their "formation" approach to predation. They are able to cooperate in the process of predation and show a high level of team spirit.

The researchers focused on tracking two groups of dolphins. The researchers observed more than 60 predatory activities in these two groups, and they found that at the beginning of the predation, the dolphins always first set up a pocket-shaped encirclement, and then a dolphin acted as a "bombardment" to drive the prey into their encirclement. When the prey enters the encirclement, they finally capture the prey together.

Researchers have found that this formation of dolphins is very efficient. What's even more interesting is that the dolphins that take on the role of "bombarders" are fixed.

Make use of "sonic waves**".

Scientists have confirmed that dolphins use ultrasound to accurately identify directions, determine water depth, and distinguish various foods such as fish, mollusks, and crustaceans. However, American researchers have recently discovered that dolphins also use a combination of different sound waves as a prey.

When the researchers filmed wild Atlantic spotted dolphins chasing herring, they found that the dolphins first quietly stalked, and when they approached the herring school, they suddenly made a low "boom" sound, and as a result, the chased herring immediately lost their way and lost their way to escape, and finally became the belly of the dolphins.

Dolphins do not rely on their eyes to see objects, their eyesight is very poor, they rely on echolocation, send out sound waves, the sound waves are reflected back when they encounter objects, and are received by the dolphin's ears, and the dolphin can determine the shape, size and position of the object.

Human vocal frequency range δf Hz 65 1 100 auditory frequency range δf Hz 20 20 000 dolphin vocal frequency range δf Hz 7 000 120 000 auditory frequency range δf Hz 150 150 000

The mouth of the dolphin is not suitable for eating large animals (because it is long, narrow), it can only eat small fish and so on (it can clamp its prey like a bird's beak), and I have never heard of a dolphin eating a man, you can read some knowledge.

'Often you don't (hum sawed you) (kiss) (nani) (hum sawed you) (kiss) (nani)

Will save people, I haven't heard of cannibalism.

Dolphins hunt in groups, and a recent study of the Florida coast shows that each dolphin has a clear division of labor in the hunt.

Cooperative hunting has been found in many animal groups, such as chimpanzees.

But each individual has his or her own specific job in the group, just like in a football team, each player has their own division of labor, which is rare in animal groups.

U.S. researchers observed two groups of dolphins, one consisting of three and the other consisting of two to six members. The researchers identified each dolphin by marking their fins and observed their hunting 60 times.

It was found that during the group hunt, one of the two groups of dolphins always acted as a "driver", and the other dolphins acted as an "obstacle", and the "driver" dolphins would drive the small fish around them into the encirclement formed by the obstacle dolphins.

This individual division of labor in the hunt has only been found in African lionesses in the past. One lioness stands in the center of the entire hunting site, while the other lionesses flank their prey from all sides to the middle.

As for the special division of labor in the dolphin group discovered this time, the researchers said that it is not yet certain whether this special hunting method is found in all dolphins, or whether dolphins are only found in a specific area.