Is the baiji dolphin really extinct, I don t believe it

1) The baiji dolphin is an animal that moves collectively in a family unit, and its size is not small, and with its light body color, the target should be large when it moves, but since such a detailed search has not been found, even if there is.

If one or two slip under the human eyelids, they will also become extinct because they cannot reproduce;

3) the ecology of the Yangtze River is seriously deteriorating, and they do not get enough food; Busy surface vessel activity can also cause terrible damage to them. In short, the environment suitable for the survival of baiji dolphins no longer exists.

Baiji dolphins mainly live in the middle and lower reaches of the Yangtze River and the waters connected to it, such as Dongting Lake, Poyang Lake, and Qiantang River, and usually have more than 10 heads together, and like to move in deep and rapid waters.

The mating period of the baiji dolphin is the late winter and early spring of each year, and the gestation period of the mother dolphin is about 1 year, so most of the litters are in the spring of the following year. After birth, the baby white dolphin is fed by its mother's milk, and it is not considered mature until it is five or six years old; The general lifespan is 30 years. The baiji dolphin breeds once every two years, with one litter per litter, and the current number is scarce, with an estimate of only about 300 20 years ago, when it was already in danger of extinction.

November 6, 2006 On December 13, 2006, nearly 40 scientists from China, the United States, the United Kingdom, Japan, Germany and Switzerland investigated the 1,700-kilometer section of the main stream of the middle and lower reaches of the Yangtze River from Yichang to Shanghai, and did not find a single baiji dolphin. From 1997 to 1999, the Ministry of Agriculture organized large-scale monitoring operations for three consecutive years, and found 13, 4 and 4 baiji dolphins in three consecutive years. The result of this expedition was 0.

1979: China declared the baiji dolphin an endangered species.

1983: Legislation made it illegal to hunt baiji dolphins.

1986: 300 heads remaining 1990: 200 heads remaining.

1997: less than 50 (23 found).

1998: Only 7 were found.

2004: In July, the stranded and dead body of the Baiji dolphin was found in the Nanjing section of the Yangtze River.

2006: almost 0 heads.

2007: The Yangtze River Baiji dolphin was officially declared extinct on August 8.

2007: On August 19, a citizen in Tongling, Anhui Province, stumbled upon a Baiji dolphin in the river section of the Tongling Freshwater Dolphin National Nature Reserve and photographed it with a digital camera.

The white dolphin is really extinct.

Humans hunted them in large numbers and hooked their heads with hooks, and it just so happened that their heads were the most vulnerable, and as a result, the baiji dolphin became extinct.

It's probably not extinct yet, just waiting for you to find out.

This friend, it's a pity that the white-sided dolphin is really extinct

The white-sided dolphin has become extinct, and scientists declared it functionally extinct when the captive white-sided dolphin from the Wuhan Research Institute died of aging in 2002.

The white-sided dolphin in the Yangtze River is at the top of the food chain and has no natural predators, so its disappearance cannot be caused by natural causes, but in fact, it is human activities such as overfishing, water transportation, and pollutant discharge that cause the disappearance of the white-sided dolphin. More than 90% of the white-sided dolphin specimens collected over the years were directly caused by human activities.

Causes of the extinction of the white-sided dolphin:

The endangerment of the white-sided dolphin is partly due to internal reasons, and the other part is the external cause of the human environment, the first internal reason is that the white-sided dolphin has a long reproductive cycle, they can live up to 30 years, so they are sexually mature at the age of six, and the total number of white-sided dolphins is not much, so the inability to reproduce in large numbers has become an important reason for the extinction of the white-sided dolphin.

The 2017 finless porpoise conservation team spent 30 days searching for information about the finless porpoise and investigating the white-sided dolphin, but it is said that they have never seen one in ten years, and this one in 2018 brought hope to countless volunteers.

Extinct.

The white-sided dolphin has become extinct, and with the aging and death of the white-sided dolphin in captivity at the Wuhan Research Institute in 2002, scientists declared the white-sided dolphin extinct.

The white-sided dolphin in the Yangtze River is at the top of the food chain and has no natural predators, so its disappearance cannot be caused by natural causes, but in fact, it is caused by human activities such as overfishing, water transportation, and pollutant discharge, and more than 90% of the dead white-sided dolphins in the specimens collected over the years are directly caused by human activities.

Another part of the reason is that the white-sided dolphin has a long reproductive cycle, they can live up to 30 years, so they only mature at the age of six, and the total number of white-sided dolphins is not much, so the inability to reproduce in large numbers has become an important reason for the extinction of the white-sided dolphin.

About the white dolphin

The white-sided dolphin is an aquatic mammal of the class Mammals, a small freshwater cetacean endemic to China, with a spindle-shaped body, a body length of meters, and a weight of up to 230 kilograms.

Its snout stretches forward like a bird's beak, the tip of the snout is slightly upturned, about 30 cm, the top of the forehead is significantly raised, the nostrils are long on the top of the head, when breathing, the head comes out of the water first, the splash is not high, the eyes are very small, the upper part of the mouth is behind the mouth, the ear holes are needle-eyed, the dorsal fin is triangular, the flippers are wide, the end is obtuse and rounded, the tail fin is crescent-shaped, the back of the body surface is blue-gray, the ventral surface is white, and the tail fin does not come out of the water.

The white-sided dolphin mainly lives in the middle and lower reaches of the Yangtze River in China and the waters connected to it such as Dongting Lake, Poyang Lake and Qiantang River. It is a carnivore that feeds on freshwater fish and often swims to the shallow waters of the shore in the morning and dusk to hunt.

The above content refers to the encyclopedia white-sided dolphin.