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A pink dolphin was found in Liuxi River in Guangzhou, weighing 200 kilograms

Time:2022-10-04 11:13:01 source:ucutxmastrees.com author:Beast Read:799次
A pink dolphin was found in Liuxi River in Guangzhou, weighing 200 kilograms

The news of the discovery of pink dolphins in the Liuxi River in Guangzhou has been circulating in Cantonese circles of friends in recent days. It is reported that when a citizen was playing in the Baiyun section of the Liuxi River in Guangzhou, they suddenly found that there seemed to be movement in the middle of the river. At first, people thought it was big fish. But a closer look shows that the size of the animal protruding from the river surface has obviously exceeded the size of the average big fish, with a visual weight of about 200 kilograms, and more importantly, its body is pink. This strange aquatic creature has attracted the attention of many tourists, who have recorded it with their mobile phones. Looking closely, it is not so much a big fish as it is a dolphin, with a long, narrow and protruding mouth, rolling and playing on the water. This discovery quickly attracted the attention of relevant departments and experts. After careful identification, it was confirmed that this is a Chinese white dolphin, which is a national first-class protected animal, and is very precious, known as the "water giant panda". However, it is puzzling that Chinese white dolphins are mainly distributed in the coastal shallow waters from southeastern my country through Southeast Asia to the Bay of Bengal, and are mostly found in the waters where brackish and fresh water meet. Although Guangzhou Liuxi River is close to the mouth of the sea, it is strictly an inland river. How did this Chinese white dolphin come here? At present, experts have not given a definite conclusion. People speculate that there may be problems with its navigation, positioning or sonar-related systems, so that the direction cannot be distinguished. After all, judging from its body color, this is an older individual. The Guangzhou Municipal Bureau of Agriculture and Rural Affairs also quickly set up an expert group to investigate and rescue the white dolphin.

Body color changes with age, pink dolphins are adults

Chinese white dolphins belong to the dolphin family of cetaceans, It is a close relative to the killer whale. Many people think it is a kind of fish, so in ancient times people called it "Zhenjiang fish". In fact, dolphins, like whales, are mammals with a relatively constant body temperature. They conceive and give birth, feed their young with milk, and breathe with their lungs. Regarding the Chinese white dolphin, the earliest records in my country can be traced back to the Tang Dynasty, but everyone should not be misled by the word "China", thinking that it is a unique species in my country. In fact, they are not distributed in the waters of our country, but also in the waters of some Southeast Asian countries such as India, Bangladesh, Myanmar, Thailand, and Vietnam. Chinese white dolphins experience some changes in their body color during their lifetime. When they are just born, their body is dark gray. When they grow up, they will turn gray when they are young, and they will be pink when they become adults. Seeing this, many people may have doubts. It is obvious that they have not shown white at all stages, so why are they called white dolphins? In fact, there may be some differences between what we see and what we see in nature. When Chinese white dolphins become adults, their skin will turn pure white, and the reason why they look pink is mainly because of their rich subcutaneous blood vessels. It turns pink. So pink is not their real color, white is their original appearance.

Have fangs, the top predator in the offshore

Dolphins give the impression of being tame, kind, and lovely. In many stories, dolphins have always been It's also a heartwarming character, so it's hard to associate it with a "top predator". In our impression, top predators should have fangs and claws, as fierce and powerful as ligers and leopards. Although the Chinese white dolphin does not have sharp claws, it has fangs. In the offshore area, they are the real top predators. There are 125-135 cone-shaped teeth in the mouth of the Chinese white dolphin, which are sparsely arranged and are obviously not prepared for chewing food, but for preying. Chinese white dolphins mainly feed on a variety of fish that enter the sea, such as lion head fish, silver pomfret, dragon head fish, mullet, stone totoaba, large yellow croaker, scorpion and so on. Among them, the lionhead fish is their favorite prey, followed by the guinea pig and the totoaba. Chinese white dolphins are large in size and can grow to 200-250 kilograms when they are adults. Some scientists have anatomically analyzed that the weight of the food in their stomachs can reach more than 7 kilograms. When eating, Chinese white dolphins do not chew, but swallow directly, leaving the rest to the stomach. Their digestive system is the same as that of mammals on land. Chinese white dolphins like to live alone or in groups of three or five, and rarely gather in large groups. According to relevant records, it is very rare that more than 10 dolphins gather together. They especially like to follow fishing boats, especially double tugboats, to forage and swim extremely fast.

The "umbrella protection species" in the offshore, the giant panda in the water

The giant panda has now evolved into an adjective, as long as it is some precious and rare animals and plants, it will Named "Giant Panda". For example, the silver fir tree is called the giant panda among plants; the golden-billed swallowtail is called the giant panda among butterflies; the Chinese white dolphin is called the giant panda in the water. In biology, there is a concept called "umbrella protection species", which was proposed in 1984, which roughly means to select a target species whose habitat requirements can cover all the habitat requirements of other species. protection, but also provides an umbrella for other species, then this target species is called an umbrella species. There is no doubt that the giant panda is the most typical and famous umbrella species. People have invested a lot of manpower and material resources to protect the giant panda and protect its habitat, so that all creatures living in the same habitat can benefit. Chinese white dolphins are also an umbrella species. They mainly live in the coastal waters, especially the junction of freshwater and saltwater at the mouth of the river, which is their favorite activity area. They do not go to water depths of more than 25 meters, they almost never migrate, and they are sedentary animals. Therefore, people vigorously protect the Chinese white dolphin and the offshore environment, so that other species in the same sea area are also exposed. There are legends of "mermaids" in many parts of the world. Later, many scholars believed that the prototype of mermaids was dugongs. However, the appearance of dugongs is really not flattering. It is too different from the beautiful mermaid in the legend. If there is really any animal that is the prototype of a mermaid, I would prefer to vote for the Chinese white dolphin. After all, they look pink and have a lively temperament. In the wind and sunny weather, they like to jump and play on the water. This picture Doesn't it look a thousand times better than a dugong? Follow me and make a friend who understands animals.

(责任编辑:Rare species)

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