What is the reason why the manatee dugong has been declared functionally extinct in China?

The "manatee" dugong has been declared functionally extinct in China for the following reasons.

The "manatee" dugong has reportedly been declared functionally extinct in China, and the results of the study, which was carried out by the Chinese Academy of Sciences in conjunction with the Zoological Society in London, were published in the British journal Open Science.

The study conducted interviews in 66 fishing villages in Hainan, Guangxi, Guangdong, Fujian, and China, and according to the researchers' investigation, it was found that dugongs are distributed here in Chinese mainland. Of the 788 people surveyed, only three had seen dugongs in the last five years, and the most recent observation was a year ago.

According to previous data analysis, there have been no records of dugongs in China since 2008, and no effective field studies have been obtained. This also means that the "manatee" dugong has become functionally extinct, and the wild population of the dugong is too small to reproduce normally and cannot sustain its survival.

The first is the impact of human activities, such as the collision of boats, being entangled in fishing nets, dugongs are mammals, need to breathe on the surface of the sea regularly, once caught in the net, they will suffocate after a long time and cannot surface! Of course, in the final analysis, it has something to do with the dugong's gentle and slow personality.

Secondly, its reproductive ability is not strong, about fifteen years old, dugongs are sexually mature, and then every two or three years will give birth, after the birth of the interval of 2-3 years, this rate is relatively slow compared to many organisms.

Finally, the lack of food will also lead to a decrease in the number of dugongs, which are herbivorous animals, and human navigation, fishing, sand mining and other operations in the offshore sea have a certain impact on the growth environment of seaweed.

Just like there is no grass on a bustling street, there is no seaweed on the bottom of the bustling sea. If there is no seaweed, then the dugong has no food at all.

The latest research suggests that the dugong is a marine creature that is functionally extinct in China due to habitat destruction and poaching.

Because the environment in our country is becoming less and less suitable for dugongs, many human activities have taken a toll on seagrass.

It is related to the environment, and the environmental damage is more serious, so it will lead to this situation, and we should pay attention to protecting the environment.

Genus differences: Manatees belong to the genus Manatee in the family Manatee, while dugongs belong to the genus Dugongs in the family Dugongaceae.

Tail Difference: Manatee's tail is wide and large, with no forks; Dugongs have forked tails.

Wrinkle difference: manatee ** rough, wrinkled; The ** of dugongs is smoother and has fewer folds.

Differences in nostril position: Manatees have nostrils farther from the top of the head, while dugongs have nostrils closer to the top of the head.

Toenail Difference: Manatees have toenails on their forelimbs, dugongs don't.

1. Are manatees and dugongs the same animal? Both the sea dust cow and the dugong are mammals living in the ocean, and their living environments are relatively similar, and they are basically active in diving.

From the category to which they belong, manatees and dugongs are both animals in the order Mammalian and Manatee.

In appearance, the two are also relatively similar, and the body size is similar.

As a result, many people confuse the two and think that they may be the same animal.

Actually, no, the two do not refer to the same animal, and the differences between them are quite large, and they are different in many ways.

2. What is the difference between manatee and dugong 1. Difference between genus and genus: Although manatee and dugong are both mammals and manatees, their families and genera are different.

Among them, manatees belong to the family Manatee and the genus Manatee, while dugongs belong to the family Dugongaceae and dugongs, so the two are two different animals and cannot be confused.

2. Tail difference: There are very obvious differences between the tails of manatees and dugongs.

The manatee's tail looks very wide and very large, and it is not forked; The tail of the dugong is "Ya" shaped, with forks, much like the tail fin of some fish.

3. The difference between wrinkles: The wrinkles on manatees and dugongs are different.

Manatee ** is rougher, there are more wrinkles on it, and sometimes there are some seaweeds attached to it, which looks dirty and ugly.

However, dugongs have fewer wrinkles on their **, and they look better.

4. Difference in nostril position: The position of the nostrils is also different, specifically the distance from the top of the head.

Manatees have nostrils farther above their heads, and dugongs have nostrils closer to the top of their heads.

5. Toenail distinction: Another key feature of manatees is that they have toenails on their forelimbs, but dugongs do not.

The dugong and the manatee are not the same animal. The body of the dugong is spindle-shaped, about 3 meters long, weighing 300-500 kilograms, and is a national first-class protected animal; Manatees are spindle-shaped in shape and resemble calf calfs, but have short necks, unlike whales. Although they are both mammals and manatees, their families and genera are different.

Dugongs and manatees are not the same animal. The body of the dugong is spindle-shaped, about 3 meters long, weighing 300-500 kilograms, and is a national first-class protected animal; Manatees are spindle-shaped in shape and resemble calf calfs, but have short necks, unlike whales. Although they are both mammals and manatees, their families and genera are different.

Dugong habits: slow movement, docile temperament, poor eyesight, sensitive hearing, lethargy on weekdays. After eating, in addition to ventilating from time to time, he likes to dive into the bottom of the sea at a depth of 30-40 meters, lie on the rocks and other places and wait, never far from the coast to the deep sea of the ocean.

There are certain requirements for sea temperature, do not go to the cold sea. If the water temperature is lower than 15, it is easy to die of pneumonia; Poor water quality is also prone to ulcers, endoparasites, etc. They like to move in groups, and they are active in family groups of 2-3 heads, and although they often act alone, they also form small groups of about 6 heads, sometimes reaching hundreds or more.

It lives on the bottom of a well-coded seagrass area in sheltered conditions, and regularly surfaces to breathe. Shy by nature, as long as the slightest fright, it will immediately run away. Never far from the coast.

The speed of movement is not fast, generally about 2 knots per hour, and only 5 knots when escaping.