PDF Dolphin Facts for Kids: Learn Fun and Interesting Facts About Dolphins (Learn About Nature)

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In , the Yangtze River dolphin was named functionally extinct. Because dolphins are mammals, they need to come to the surface of the water to breathe. Unlike land mammals that breathe and eat through their mouths, dolphins have separate holes for each task. Dolphins eat through their mouths and breathe through their blowholes. This prevents the dolphin from sucking up water into the lungs when hunting, reducing the risk of drowning. Love these dolphin facts and eager to dive with them?

If you are not yet a PADI Diver, learn about getting scuba certified , or book your next vacation to dive with dolphins. Natacha Gajdoczki. Here are 10 fascinating dolphin facts that will make you love them even more. View this post on Instagram. Share This. Spectacular seahorses: 10 things to know about these tiny undersea wonders.

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Deciduous Forests. Although they are traveling in these pods, the dolphins do not necessarily swim right next to each other.

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Rather, they swim within the same general vicinity. In order to prevent losing one of their pod members, there are higher whistle rates. Because their group members were spread out, this was done in order to continue traveling together. Dolphins frequently leap above the water surface, this being done for various reasons. When travelling, jumping can save the dolphin energy as there is less friction while in the air. Dolphins show various types of playful behavior, often including objects, self-made bubble rings , other dolphins or other animals.

10 Fascinating Dolphin Facts

Playful human interaction with dolphins being the most obvious example, however playful interactions have been observed in the wild with a number of other species as well, such as humpback whales and dogs. Juvenile dolphins off the coast of Western Australia have been observed chasing, capturing, and chewing on blowfish. Dolphins are known to teach, learn, cooperate, scheme, and grieve. Brain size was previously considered a major indicator of the intelligence of an animal. Since most of the brain is used for maintaining bodily functions, greater ratios of brain to body mass may increase the amount of brain mass available for more complex cognitive tasks.

Killer whales have the second largest brain mass of any animal on earth, next to the sperm whale.

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Self-awareness is seen, by some, to be a sign of highly developed, abstract thinking. Self-awareness, though not well-defined scientifically, is believed to be the precursor to more advanced processes like meta-cognitive reasoning thinking about thinking that are typical of humans. Research in this field has suggested that cetaceans, among others, possess self-awareness. If the animal then goes to the mirror in order to view the mark, it has exhibited strong evidence of self-awareness.

Some disagree with these findings, arguing that the results of these tests are open to human interpretation and susceptible to the Clever Hans effect. This test is much less definitive than when used for primates, because primates can touch the mark or the mirror, while cetaceans cannot, making their alleged self-recognition behavior less certain.

Skeptics argue that behaviors that are said to identify self-awareness resemble existing social behaviors, and so researchers could be misinterpreting self-awareness for social responses to another individual. The researchers counter-argue that the behaviors shown are evidence of self-awareness, as they are very different from normal responses to another individual.

Whereas apes can merely touch the mark on themselves with their fingers, cetaceans show less definitive behavior of self-awareness; they can only twist and turn themselves to observe the mark. In , Marten and Psarakos used television to test dolphin self-awareness.

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They concluded that their evidence suggested self-awareness rather than social behavior. While this particular study has not been repeated since then, dolphins have since passed the mirror test. Generally, dolphins sleep with only one brain hemisphere in slow-wave sleep at a time, thus maintaining enough consciousness to breathe and to watch for possible predators and other threats.

Sleep stages earlier in sleep can occur simultaneously in both hemispheres.

tritrainatsmilro.tk In this case, respiration is automatic; a tail kick reflex keeps the blowhole above the water if necessary. Anesthetized dolphins initially show a tail kick reflex.

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Living in water with strong currents and potentially dangerous floating debris, it must swim continuously to avoid injury. Dolphins have few marine enemies. Some species or specific populations have none, making them apex predators. For most of the smaller species of dolphins, only a few of the larger sharks, such as the bull shark , dusky shark , tiger shark and great white shark , are a potential risk, especially for calves.

National Marine Mammal Foundation revealed that dolphins, like humans, develop a natural form of type 2 diabetes which may lead to a better understanding of the disease and new treatments for both humans and dolphins.

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Dolphins can tolerate and recover from extreme injuries such as shark bites although the exact methods used to achieve this are not known. The healing process is rapid and even very deep wounds do not cause dolphins to hemorrhage to death. Furthermore, even gaping wounds restore in such a way that the animal's body shape is restored, and infection of such large wounds seems rare. A study published in the journal Marine Mammal Science suggests that at least some dolphins survive shark attacks using everything from sophisticated combat moves to teaming up against the shark.