The finless porpoise is now the only freshwater dolphin in the Yangtze River, why is the finless por

Because of the impact of environmental protection, environmental pollution is becoming more and more serious, and the water quality requirements of finless porpoises may not have changed, but we have changed the water quality.

Because of the different physiological structures, strict water quality is better conducive to the survival of finless porpoises.

Environmental changes The finless porpoise is the only freshwater subspecies in the genus Finless Porpoise.

Because of serious environmental pollution, the living environment of the finless porpoise has deteriorated.

Because polluted water sources can be fatal to them.

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It's because of its physiology, which is why it's so strict.

Because the environment is changing faster than the finless porpoise is evolving.

Extraordinary people are strict about water quality.

As of 2020, the Yangtze finless porpoise population is currentOnly about 1,000 heads remained. The National Forestry and Grassland Administration and the Ministry of Agriculture and Rural Affairs today (June 19) began to solicit public opinions on the "List of Wild Animals under National Key Protection". The "List of National Key Protected Wild Animals" plans to add or upgrade the protection level of about 400 species, such as the spoon-billed sandpiper, the Yangtze finless porpoise, and the northern copperfish, all of which are considered to be upgraded or added to the national first-class protected species.

On July 24, 2018, the Ministry of Agriculture and Rural Affairs held a press conference on the implementation of the Yangtze River finless porpoise scientific investigation and the rescue of rare species in the Yangtze River, and Yu Kangzhen, vice minister of the Ministry of Agriculture and Rural Affairs, introduced that the scientific expedition estimated the number of Yangtze finless porpoises to be about 1,012, of which about 445 in the main stream, about 110 in Dongting Lake, and about 457 in Poyang Lake.

The exact number is unknown, but as of 2020, there are only about 1,000 finless porpoises left.

The Yangtze finless porpoise is listed on the IUCN Red List of Threatened Species (IUCN) as Critically Endangered (CR) in 2016. Listed in the CITES Appendix of the Washington Convention Endangered species. China's Ministry of Agriculture has issued a document requiring the protection and management of the Yangtze finless porpoise in accordance with national first-class protected animal standards.

List of Wild Animals under National Key Protection" is a national first-class protected animal.

Population status. The Yangtze finless porpoise faces threats mainly due to the impact of human activities. The noise and propellers of the high-density and busy navigation vessels in the main stream of the Yangtze River have become the biggest threat to the finless porpoise, and the indiscriminate fishing and illegal fishing in the Dongting Lake area, the construction of some water conservancy facilities due to water pollution, etc., the fixed nets used in the lake area occupy a large amount of water surface in the dry season.

Human activities such as the construction of water conservancy facilities and water pollution continue to intensify, leaving the Yangtze finless porpoise facing the same threat as the white-sided dolphin, and the population in the wild has declined sharply. With only about 1,200-1,500 individuals, there are fewer than giant pandas, and are declining at a rate of 5%-10% per year, and the finless porpoise around Dongting Lake is extinction at the fastest rate in the entire Yangtze River basin.

When China took measures to protect the white-sided dolphin, finless porpoise and other aquatic animals, its population rebounded, and dozens of them often appeared on the surface of the Yangtze River, playing in the surging river water, sometimes jumping out of the water with black backs, sometimes diving into the river, ups and downs, turning flexibly, the scene is quite spectacular.

What is even more gratifying is that passing boats have taken the initiative to give way to the Yangtze finless porpoise, fearing that the finless porpoise will be frightened, indicating that people's consciousness of protecting wild animals is gradually increasing.

On July 24, 2018, the Ministry of Agriculture and Rural Affairs held a press conference on the implementation of the Yangtze River finless porpoise scientific investigation and the rescue of rare species in the Yangtze River, and Yu Kangzhen, vice minister of the Ministry of Agriculture and Rural Affairs, introduced that the scientific expedition estimated the number of Yangtze finless porpoises to be about 1,012, of which about 445 in the main stream, about 110 in Dongting Lake, and about 457 in Poyang Lake.

There shouldn't be many Yangtze finless porpoises now? Come, most of them have perished, really very few.

1. Water pollution causes the destruction of its habitat 2. Human hunting, resulting in a sharp decline in the finless porpoise population 3. Human fishing, tourism, dam building and other activities affect the breeding of the finless porpoise.

A: Probably man-made, humans have built a lot of hydropower stations, which have affected fish activities, as well as human fishing activities.

Dolphin. The finless porpoise first lives in a completely different environment, one lives in seawater and the other lives on the boundary between saltwater and freshwater in the offshore water, belonging to different classifications, and the finless porpoise does not have a dorsal fin. The evolutionary history of the dolphin family dates back 10 million years and there are 40 species, killer whales.

Belongs to the large dolphin family.

<> finless porpoise belongs to two different families. The most significant difference in appearance is the absence of a dorsal fin, which is why the finless porpoise is called the finless porpoise in English. Another nickname, the "Right Porpoise", describes the same trait.

Dolphins, often a very broad term, encompass quite a few species, even in axons.

There is also considerable variation in the lower (genus and below). The biggest difference between dolphins and dolphins is the taxonomic location, dolphins belong to dolphins and dolphins belong to two different families. The most obvious difference in appearance is that dolphins do not have dorsal fins, so it is also known as finless dolphins.

Dolphins have smooth body hair and a pliable and pliable body.

Well, very good at jumping and swimming, and also the fastest mammal in the water.

Possess a very intelligent brain and a well-developed sonar.

They rely on the sound waves of sonar for echolocation during activities, and they have a good ability to listen in water and air, and the nostrils of dolphins grow on their heads, which is convenient for drinking water and breathing, the smallest dolphin is about 1 meter long, about 30 kilograms, and the largest dolphin is about 10 meters long and 14 tons, each dolphin presents different morphological characteristics, the brain is very developed, and it has an extraordinary memory, and humans train dolphins to make a lot of difficult movements, with a high IQ and a friendly personality, many people like dolphins.

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The living environment is different, the area where the dolphin lives is in the seawater, but the area where the finless porpoise lives is at the junction of saltwater and freshwater, and the finless porpoise has no fins on its back, so the volume is different. The size of the dolphin is much larger than that of the finless porpoise.

Different classifications, different body types, different appearances, different diets, and different living environments. Finless porpoises do not have dorsal fins.

Finless porpoises and dolphins are two different animals. Dolphins are larger in size, while finless porpoises are puffer fish and are smaller in size. Dolphins are not poisonous.

In the opinion of many aquatic biology experts, "lack of food" is the primary reason for restricting the population of the Yangtze finless porpoise. The critically endangered population of the Yangtze finless porpoise is the result of a combination of human activities, such as the sharp decline in fish population, the lack of food for the finless porpoise, the rapid development of the shipping industry interfering with the sonar communication of the finless porpoise, the pollution of the water area reducing its fecundity, and the accidental injury of the finless porpoise by fishing gear and boats.

The Yangtze River basin is a natural spawning ground for many freshwater fish, and fishery resources were once extremely abundant. But today, the fishery resources of the Yangtze River have declined in an all-round way: the annual output of anchovy from 1,570 tons in 1974 has basically disappeared to now, the annual output of swordfish from 4,000 tons in the 20th century to the recent years has been unable to form a fish flood, the occurrence of "four major fish" seedlings has dropped by more than 90% compared with the 50s of the 20th century, and the spawning has dropped from a maximum of 30 billion to a minimum of 100 million ......The finless porpoise, which feeds on fish, has also been hit by the "food crisis".

We all know that the current number of finless porpoises in China is very, very small, and we can now see the opportunity to see finless porpoises in the Yangtze River as often as before.

According to scientific estimates, the distribution of the Yangtze finless porpoise in China is about 1012, although after unremitting efforts, the results show that although the number of Yangtze finless porpoises has been curbed to a certain extent, but the endangered situation they are facing has not been changed too well, and their form is still very severe. The staff said that among the 1012 Yangtze finless porpoises, there are 445 finless porpoises, which are distributed in the main stream, and where they are distributed, they are also in the river section where there is less human interference, and their distribution is also fragmented, there are about 110 finless porpoises in Dongting Lake, and there are also about 457 finless porpoises in Fanyang Lake. The finless porpoise is a second-class protected animal in China.

As early as the last century, our country has carried out some protection work related to the Yangtze finless porpoise, and has also taken a series of effective protection measures, but after our long-term efforts, the form of the finless porpoise is still very severe, and this endangered state has not been changed, the reason why these finless porpoises have not been changed is mainly because of the interference of human activities, because of human activities, such as water pollution engineering construction, shipping development, overfishing, and illegal sand mining and other human activities. It will directly pose a serious threat to the survival of the finless porpoise.

At present, the number of finless porpoises in China is about 1,000-2,000. There are more than 500 in the main stream. It can be seen in the two lakes, and in the sand pit during the normal dry season.

There are only more than 1,000 finless porpoises, and now wild finless porpoises can still be seen in the Yangtze River basin and the Pearl River Delta region, because the living environment of finless porpoises has very high water quality requirements, and the water quality in these places is relatively good.

There are more than 1,000 finless porpoises in China. There is a Tongling Freshwater Nature Reserve that was built to protect these remaining finless porpoises from being hunted.

The Yangtze finless porpoise (also known as the great white shark) is a predatory aquatic mammal belonging to the shark family. They feed mainly on small fish and also eat small mammals, molluscs, and crustaceans.

The relationship between the Yangtze finless porpoise and small fish is the relationship between predators and eaters in the food chain. The Yangtze finless porpoise is a predator of small fish, which in turn feed the Yangtze finless porpoise. This relationship is common in nature and is an important part of biodiversity.

However, due to the impact of human activities on the waters, the population of predatory aquatic animals such as the Yangtze finless porpoise has decreased, which has also led to an increase in the number of small fish. In order to protect these animals, we should strengthen the protection of water areas and reduce disturbance to the natural world.

The largest living freshwater dolphin is the Amazon pufferfish. The Amazon puffer fish is also known as the Amazon Laughing Ponsun Freshwater Dolphin, the Amazon Finless Porpoise, the Pink Pufferfish, and the Pink Freshwater Dolphin. It is the largest freshwater dolphin in existence, and is found in the Amazon River and Orinoco River basins.

The Amazon pufferfish, with its fleshy globular forehead and long, pointed beak, is ideal for hunting fish in the twig-lined rainforest or pecking at crustaceans in river mud.

Habits of the Amazon pufferfish:The Amazon puffer fish is mostly found in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. They usually live alone or in pairs, but sometimes they form groups of up to 15 or so for hunting.

They have better vision, but their swollen jaws block their downward vision, and sometimes they flip their bodies over to backstroke for the sake of observation.

The sub-puffer fish population is also relatively abundant, and they are a relatively common species compared to other freshwater dolphins. However, the sub-river dolphin is also facing habitat destruction, deterioration of the living environment, water pollution and the drying up of river tributaries, and the population is now classified as "vulnerable" amur animals.