More and more people are attacked by sharks and this is the real reason behind

What is the real cause? Is climate change, or do people have other impacts?

Sharks are always considered as assassins of the ocean. They topped the food chain, possessing the characteristics of a cold-blooded predator (like muscle, sharp teeth and high swimming speed).

It is frightening but there is an unexpected fact that the number of people attacked by sharks every year is not high. In the past 60 years, only over 2700 people have been attacked in the world, of which about 439 have died. Compared to the number of sharks that are killed every year up to . more than 100 million (Dalhousie University data in 2013) is a joke.

In recent years, the number of cases of shark attacks is increasing rapidly.

However, in recent years, the number of cases of shark attacks is increasing rapidly, especially in North Carolina, USA. A few days ago, an 8-year-old boy in South Beach (North Carolina) was attacked by sharks, leaving a bite on his leg. A week earlier, a young man came ashore with a "deep bite" at his feet while surfing at Ocean Isle beach.

The most catastrophic must mention the event on 2/6/2019. The victim is a 17-year-old girl named Paige Winters, who has lost almost all her left and 2 fingers because of shark attacks. She just escaped death thanks to her father's discovery, rushing to give the sea monster 5 punches to the nose (weakness of the shark) to let it release.

Paige Winters is saved by her father's five powerful punches.

According to Gavin Naylor, director of the Florida Shark Research Program, it is difficult to relate all three cases, since they are different species."People often equate sharks to be the same species, but the truth is not" - quoted Naylor.

He said the bites on the lower leg could be due to the black-headed shark - a small, non-aggressive shark. In the case of Winters, it is more likely to be a large predatory species such as bull shark.

However, in recent months, the North Carolina region has seen more shark victims than in the whole of 2018 combined. Meaning in any way, the number of people attacked by sharks is also increasing. So what is the reason?

The more warm the sea, the more sharks?

George Burgess - the former director of the program said that the cause could be because of climate change. Warmer seawater will facilitate many large sharks to grow , meaning we have more sharks.

"The temperature of the sea along the East Coast of the United States is increasing, and there are animals that really like this, typically sharks," Burgess explained.

Warm sea water creates favorable conditions for sharks to move to the North.

The oceans can absorb up to 93% of the heat generated from the planet's greenhouse gas. This has a great impact on the lives of thermal animals such as sharks, because they use the environment to regulate body temperature.

"Climate change causes the ocean to warm up, and the effect gradually spreads to the North," Burgess said. This means that sharks also move more towards the northern sea.

According to a study from 2018 published in Scientific Reports, predatory sharks like bull sharks have a wider range of northern habitats, including waters in North Carolina.

The story is also in the terrain

North Carolina state waters are also a great place for bull sharks to appear, because it has a lot of rivers flowing into the ocean.

"Cow sharks are species that can survive in freshwater environments. That's why they can appear so deeply inland."

Especially in brackish water areas - where river water mixes with sea water, it is a haven for sharks to appear, because many other fish species are also there.

"Cow sharks can attack many types of bait, sometimes there are people in it. They are large in size and are usually quite consistent when attacking."

Sharks are much more, but the main reason is because people are too crowded

Ignoring the case of Winters, other cases only suffered minor injuries. According to Naylor, black-headed sharks are usually not aggressive. For them, biting humans will be similarly surprising to the victims bitten by them. And moreover, the bite is usually not very dangerous.

"These are really probing bites. They want to find out what the thing in front of them is. Small sharks will never risk attacking something you don't know well" - Erich Ritter said. shark researcher from Princeton University.

Sharks are much more, but the main problem is that more and more people go to the beach . According to Burgess, the North Carolina cruises industry is attracting a lot of visitors every year. Sharks and people appear much in a sea area, the ability to encounter of course also increases.

If you see a scene of fish swimming in a mess, immediately leave the water.

"The main reason is because the number of people is now larger than 50 years ago. When we coexist in a water area, we can touch the face of sharks. You touch your hands, they will resist and one new report was born ".

Also, according to Burgess, the best way to avoid being attacked by sharks is if the fishes panic fled, leave the water immediately . That is a sign that sharks are hunting.

1. Sharks often attack people when the moon is new
2. Sharks prefer to attack men more than women