Why do dolphins follow ships? Why whales and puffer fish follow the boat

Because where the boat passes, the propellers will tip over or kill the nearby fish, and the dolphins are here to eat.

In fact, to put it bluntly, dolphins are here to pick up cheap !!

LZ attention, dolphins are not cheap, if that can kill the fish, it will definitely make the dolphin hurt, the dolphin will not be so stupid, the key is - your sister, LS killed me, according to his answer is wrong!! In fact, the key to dolphins doing this is to save physical strength, and of course, it is not excluded that dolphins "like to be close to humans". (The former one is the main reason, but I've always had a question.)

Why dolphins save people. ）

Dolphins' superb swimming skills are not only due to their smooth, streamlined bodies, but also to their ability to take advantage of changes in environmental conditions.

To speed things up, dolphins use the physical properties of water to switch their positions instead of fighting for physical strength. At a speed of 2 meters per second, dolphins consume 1 3 joules of energy per kilogram of body weight and have a heartbeat of 76 beats per minute, indicating that they are very good at using energy, twice as much as seals and sea lions, and 10 times more than humans.

When the speed of the boat is 3 meters and seconds, the dolphins swimming next to the boat seem to struggle a little, but they still insist on swimming there; When the speed reaches 4 meters per second, the clever dolphins stop fighting their original positions and turn to the wake of the boat, where the difference in water pressure makes it easier for them to swim. They swim half a meter underwater, barely wagbling their tails.

With the help of the wake of the boat, the dolphin breathes 5 to 5 times per minute; Without the help of wake, the same swimming speed would require 8 to 8 breaths per minute. Dolphin lactate levels are 3 times higher when breathing fast than when breathing slowly. As a result, these clever dolphins, like cyclists who are adept at using air currents, always follow closely behind another vehicle, so as to maintain high speed and save energy.

Since they take advantage of the current, their swimming speed is doubled, but they only consume 13 more energy. The results of this study confirm that dolphins are following the boat not for naughty or other reasons, but to use the environmental conditions effectively to save energy.

Don't believe that it's for food or something, it's wrong. I shouldn't have believed that I should have been right about these answers, but I saw that LS was so firm, and then I was adamantly wrong.

Here's why:1. When sailing, a "pressure circle" will be formed around the boat, and dolphins swimming behind the boat can reduce physical exertion, similar to the flight queue of geese. Calendar oak.

2. The vortex formed when the propeller rotates will suck the small fish and shrimp around, and then cut, which will form a lot of fish and shrimp fragments in the sea area near the propeller, which is equivalent to the "bait" we fish.

3. When the boat is moving, it will have sonar work, and sonar work will emit sound waves of a certain frequency. We all know whales and dolphins, these same kind communicate through sound waves, so in this way, many whales mistakenly think that this is their companion and want to communicate with their companion, so they will get close to each other.

Swim with force: Dolphins swim faster and chase the ship because the water pressure in the ship's whirlpool is lower, making it easier to swim. Get food:

It is also possible that dolphins chase the ship because the ship attracts other fish around the ship for the dolphins to hunt for. Mistaken for the same kind: Dolphins emit ultrasound waves as they swim, and when these ultrasonic waves meet the ship's sonar, they mistake the ship for the same kind.

1. Swimming with strength: The dolphin swims faster, but the speed of the ship is faster. Part of the reason why they swim faster is that dolphins know how to borrow power, in addition to their ability to swim.

Because the water pressure in the ship's vortex is lower, they can swim more easily. Researchers have shown that dolphins' tails barely have to wag their tails when they swim with force, and their breathing speed decreases significantly.

2. Access to food: When the ship passes by, it is easy to put the surrounding fish and other creatures near the ship, and it is very convenient for dolphins to hunt at this time, and the speed at which they can obtain food will also be accelerated.

3. Mistaken for the same kind: When dolphins swim in the water, they communicate through ultrasound, and when their ultrasonic waves touch the sonar of the ship, they will mistake the ship for the same kind and then chase each other with the ship.

Dolphin chasing ships is generally not too dangerous, because they swim faster and react faster. Under normal circumstances, dolphins following a ship would not be too dangerous. However, there are propellers at the bottom of the ship, and if the dolphins swim underneath the ship, there is a good chance that they will touch the propellers and be injured by the Zen oak.

1. Since the dolphin emits ultrasonic waves into the water for positioning and navigation, perhaps the sound made by the boat during operation has a certain interference with the dolphins, making the dolphins mistakenly think that the boat is their companion, so they follow the boat.

2. Dolphins have a natural affinity with humans, so they prefer to approach the human world.

Passengers on ocean-going ships can often see many dolphins swimming around the steamer, traveling with the ship for a long time, as if they are "racing" with the ship, and it is like "escorting" the ship.

Why do dolphins do this? This remains an unsolved mystery, as marine biologists have yet to investigate and study this interesting phenomenon, let alone draw any scientific conclusions. However, there are also some marine biologists who have come up with some speculative explanations for this phenomenon based on their knowledge of dolphins.

They believe that dolphins do this for 3 reasons:

One reason is that dolphins are curious creatures and have a great interest in all the uncommon and large objects in the water, whether swimmers or boats. As a result, dolphins can often be seen looking up from the surface of the water to observe what is happening around them. When they encounter a big boat, of course, they will join in the fun and see what is going on.

Another reason is to be comfortable. When the ship is sailing in the sea, the sea water behind the ship creates a "backing current", which can carry the dolphins forward, and it is easy to swim with effort and comfort, so the dolphins often follow the sailing ship to play.

Another very important reason is that the abundance of food attracts dolphins. The leftovers of the passengers on the boat are poured into the sea, and the dolphins can pick them up and eat. In addition, the ships attract a large number of small fish and other creatures that sail with them for swimming and scraps, just in time for the dolphins to feast on.

There are crocodiles, whales, seahorses, hairtails, and a variety of marine fish.