Why have man eating sharks become endangered wild animals?

There are several main reasons why man-eating sharks are considered endangered wildlife globally:

Overhunting: Overhunting is one of the main causes of the decline in man-eating shark populations. Due to their high commercial value and large body weight, man-eating sharks are used not only to make food and medicinal herbs, but also to make leather, glue and other industrial materials.

Marine pollution: Marine pollution poses a great threat to man-eating sharks and their habitats. Modern industrialization and technological development are getting faster and faster, leading to increasing environmental problems, including ocean acidification, oxygen depletion, plastic pollution, etc.

Climate change: Factors such as rising sea levels and changes in water temperature caused by climate change can lead to the destruction of man-eating shark habitats and breeding grounds, leading to a decline in their populations.

The above are the main reasons why man-eating sharks are endangered, and we need to work together to protect them and the marine ecological environment in order to ensure the balance and sustainable development of the marine ecosystem.

Man-eating sharks are now listed as endangered because their flesh and fins are highly hunted and hunted by humans, but also affected by marine pollution and ecological damage, which has led to a sharp decline in their population. In addition, man-eating sharks play an important role in the marine ecosystem, and their declining population can also have a negative impact on the entire ecosystem.

Whether sharks eat humans or not depends on the specific species, and there are some species of sharks that eat people and some that don't. For example, sharks such as whale sharks generally do not eat humans and rarely attack humans.

However, if it is a tiger shark, great white shark and other species, there is a possibility of eating people. However, humans themselves are not on the shark's diet, sharks do not actively attack humans, and cannibalism may only occur if they admit their mistake or are provoked.

Eating characteristics

Sharks mostly feed on marine animals such as fish. Sharks feed on injured marine mammals, fish, and carrion, culling weaker members of the animal. Sharks also eat litter and other waste left behind by boats.

In addition, some sharks also hunt a variety of marine mammals, fish, and animals such as turtles and crabs. Some sharks can go months without feeding, and the great white shark is one of them. It is reported that the great white shark is going to be separated.

Eat only once in a month or two.

Overfishing: Tiger sharks suffer from overfishing due to their delicious meat and fins being used as an ingredient in shark fin soup. This fishing has led to a significant reduction in the number of tiger sharks, leaving them in an endangered state.

Habitat loss: Tiger shark habitats include coral reefs and shallow coastal waters, and the destruction of these habitats threatens the survival of tiger sharks. Coral reefs have been damaged by overfishing and pollution, while shallow waters have been damaged by human activities, leaving tiger sharks without a habitat.

Climate change: Climate change also poses a threat to the survival of tiger sharks. Warmer sea temperatures can lead to changes in tiger shark habitat, as well as changes in their reproduction and food**.

Categories: Science & Engineering.

Problem description: Be more detailed!

Analysis: Sharks are primitive, ovoviviparous, and can also keep their body temperature constant enough to attack quickly with enough strength. But it's not a mammal. Sharks are a type of fish and belong to the class Ichthyidae; Whereas, mammals are all mammals.

Sharks breathe with gills, mammals use lungs.

Sharks do not nurse their young. And mammals are fed milk.

In addition, with regard to the viviparity of mammals, it should be noted that there are exceptions such as platypus. Sharks are also an exception among fish. Usually fish are spawning, while sharks are ovoviviparous.

Mammals have a coat of body coat that adapts to the terrestrial environment. In the ocean, either because the temperature is right, or because it has evolved to have a thick layer of fat to maintain body temperature, it is not needed. As a result, whales and dolphins have no coat, or very little fur.

So the lack of body hair in sharks should not be used as a reason.

Finally, mammals are homeothermic. This keeps it alive for a long time and can be adapted to a variety of environments. For the attacker, this means that the muscles can burst into force at any time. However, some scholars say that sharks can also maintain a constant body temperature.

Sharks are not mammals because sharks breathe with gills and do not nurse their young, whereas mammals breathe with their lungs and they suckle their young.

Sharks belong to a group of fish belonging to the class Cartilaginous Fishes and live in the ocean, but there are also a few species of sharks that live in freshwater. The fish's endoskeleton is composed of cartilage, without any true bone tissue, the exoskeleton is degenerated or underdeveloped, the teeth are diverse, with hard muscles, the body is spindle-shaped, and there are gill slits on both sides of the head.

Eighty percent of shark species are less than a metre long, and most sharks are small fish. Among the many shark species, the largest is the whale shark, which reaches a length of twenty meters and weighs between seven and eight thousand kilograms; The smallest broad-tailed little horn shark is fifteen centimeters long, and the difference between the two is still relatively large.

The man-eating shark is a large, ferocious shark of the mako shark family, the genus Man-eating shark.

Man-eating sharks are large ferocious sharks in the coastal layer of cold and warm temperate regions, and live at depths of 1280 meters below the surface to the continental slope. Lively and good swimmer, the average cruising speed is kilometers per hour, and it can suddenly sprint quickly, sometimes jumping out of the water.

Ferocious, prey on all kinds of fish, sharks, cephalopods, crabs, seabirds, turtles, seals, dolphins, whales, animal carrion, etc., has a record of attacking ships and attacking humans, and is one of the most ** sharks. It is widely distributed in the coastal waters of the world's oceans. In China, it is distributed in the East China Sea, the northeast waters of Taiwan, and the South China Sea.

The man-eating shark, also known as the great white shark, man-eating shark, and man-eating shark, is the extinct ancestor of sharks, and is characterized by structurally thick teeth with small serrated chewing edges.

Although sharks are powerful, sharks still have their natural predators.

Sharks are predators such as dolphins and killer whales, and some small creatures in the ocean can also kill sharks. For example, the pinfish swells in the shark's mouth so that the sea water cannot flow through the shark's gills, and the shark suffocates to death. The leopard sole is a small, flattened fish in the Mediterranean, which secretes a milky venom that can cause the shark to convulse until death on a small fraction of it.

A foreign uncle marks the shark, but the shark is eaten by some creature!

Ectotherms, also known as cold-blooded animals, are animals that are other than mammals and birds, and most of the animals on the earth are ectotherms. Ectothermic animals do not need to be cold, but because animals do not have their own mechanism to regulate their body temperature, they can only rely on their own behavior to regulate the emission of body heat or absorb heat from the external environment to increase their body temperature. When the temperature of the external environment rises, the metabolic rate of the animal increases, and the body temperature gradually rises, and they passively leave the unfavorable environment; When the temperature of the external environment decreases, the metabolic rate of the animal also decreases, and the body temperature gradually decreases.

So they either move to the sun to warm up their body temperature, or burrow into the ground or burrows to hibernate, or swim to warm waters, or hibernate in summer.

Sharks have been on Earth since 300 million years before the appearance of dinosaurs, and they have been around for more than 500 million years, and they have barely changed in nearly 100 million years. Sharks, known as sharks, sharks, and sand fish in ancient times, are behemoths in the ocean, so they are called "wolves in the sea". The conventional wisdom is that sharks' cartilage (i.e., shark fins) is high in protein, but this is wrong.

Eggs have far more protein than shark fin. In addition, studies have shown that sharks are prone to mercury accumulation and shark fins contain a certain amount of neurotoxins, which are potentially harmful to humans. Sharks are at risk of extinction because of decades of mass hunting.

Confused, "cold-blooded" is a colloquial term for "ectothermic". Animals whose body temperature changes with the change of outside temperature are called ectotherms. With the exception of birds and mammals, all other animals are ectotherms.

Sharks belong to the phylum Chordates, subphylum Vertebrates, Ichthyidae, Cartilaginous Fishes, Plate Gill Subclasses, Lateral Hole Order, and it seems to be cold-blooded, however, some scientists have found that the maha shark has warm swimming muscles, and its hot muscles are more like mammalian muscles than its scales**. The large sharks in the icy waters of the Gulf of Alaska, whose most swimming muscles are redder than the average blood, reach a temperature of 26, which is warmer than the surrounding 20 waters. This suggests that to survive in the cold waters of the North Pacific, the maha shark has become very typically warm-blooded to be able to maintain a core body temperature higher than its surroundings.

My answer is.

It is cold-blooded, but there are warm-blooded varieties.

The man-eating shark is a national second-class protected animal.

The man-eating shark is listed in the appendix of the International Convention on Endangered Species of Wild Fauna and Flora, which is equivalent to a second-class protected animal in China. In March 2017, China's Endangered Species Import and Export Administration Office published the "List of Wild Animals or Their State Auction Products Prohibited or Restricted by International Conventions Concluded or Acceded to by the People's Republic of China", and the man-eating shark was among them.

The man-eating shark, also known as the great white shark, is a national second-class protected animal. According to the law, after fishing, whether they are dead or alive, they need to be discarded into the sea, and it is illegal to land, sell and buy, and the man-eating sharks are not artificially cultivated.