What are the factors leading to the decrease of elk?

Darwinian species is the existing species of elk. According to the elk fossils, it can be divided into four species, namely, Bifidobacterium species, Jinnan species, Lantian species and Taiwan Province species. After the Shang and Zhou Dynasties, due to natural factors, self-factors and human factors, the number of elk decreased continuously.

Natural factors, in recent 5000 years, the temperature in China has gradually become cold, and swamps and waters have also decreased significantly. Elk is a warm and humid animal, and the changes in the natural environment have a great impact on its growth and reproduction.

For its own reasons, elk is too docile compared with other deer species. According to the artificial breeding in recent years, it is found that the running speed of elk is not as fast as that of sika deer, and the male deer in estrus does not attack people like sika deer, red deer and white-lipped deer. During lactation, the doe pays little attention to her cubs, and even if someone approaches their cubs, she will not attack people to protect them like other deer breeds. The struggle between male elk for their spouses is also gentle, without fierce collision and large-scale sports. The fighting time generally does not exceed 10 minute. Losers just turn around and walk away, winners stop chasing, and there is almost no disability between deer. After the male deer occupied the herd, when other male deer peeped at the female deer, the male deer occupied the herd only drove each other away by yelling and chasing. As can be seen from the above performance, their ability to avoid enemies is very poor and they are easily killed by natural enemies and humans. Moreover, the narrow eating habits of elk will become a threat to their survival.

Mankind's wanton killing is the main threat to the survival of elk, which can also be said to be the decisive factor leading to their extinction. Elk is killed in large numbers not only because it can be used as food, but also because its body parts can be used as medicine to treat diseases and strengthen the body.

After various disputes in modern times, the elk returned to China and continued to thrive in China. 1994 The third elk reserve was established in Tianezhou, Shishou City, Hubei Province, and more than 90 elk were moved from Beijing. Shishou Elk Nature Reserve was established as early as 199 1 with the approval of Hubei provincial government, and its main protection targets are wild animals and plants dominated by elk. Because the natural environment in this area is very suitable for the life and reproduction of elk, and as many as 100 plants can be eaten by elk, the population of elk has grown to more than 130 in just 3 ~ 4 years. After reasonable stocking policy and good wild recovery of elk, the goal of natural stocking was quickly realized.

At present, the total number of milu deer breeding in China has reached 1300. In recent years, wild elk have been slowly cultivated. Professionals say that wild elk are better than captive elk. The most surprising thing is that their wildness has increased, their self-protection ability has improved, and they have become more alert, and their activity areas have increased several times. In nature reserves, the number of elk living in the wild is slowly increasing. In 2003, the first pure wild elk was born in Dafeng Nature Reserve. In 2006, Dafeng City, Jiangsu Province was awarded the title of "Hometown of Elk in China" by china wildlife conservation association. Because Jiangsu Dafeng Elk Nature Reserve has more than 80 calves1during the breeding period, the population of the reserve has reached more than 1000, making it the first nature reserve in the world with more than 1000. At the beginning of 2009, the scientific investigation team of the elk in Dongting Lake was divided into two groups to carry out the investigation activities of the elk in Dongting Lake, and they were very pleased with the comfortable life of the elk.