Defend against invasive alien animals

New Zealand is an island country isolated overseas, covering an area of ??260,000 square kilometers

with a pleasant climate and beautiful scenery. Before the European colonists came here

the island was functioning healthily as a closed ecosystem

When Westerners immigrated in large numbers, the animals they brought intentionally or unintentionally,

It has dealt a heavy blow to the island's ecosystem, and some invasive animals

have seriously damaged the local ecological environment, especially the European cave rabbit

Type.

European cave rabbits, also called European hares, are native to Spain. These rabbits

weigh 4 to 5 kilograms and can run at speeds of up to 70 kilometers, making them extremely difficult to catch. And

It has strong fecundity and can give birth to 3 babies a year, with more than 3 babies per litter. The most important thing

is that hares have no natural enemies in New Zealand, so soon, hares

overrun the island.

In order to control the number of hares, the local government decided to introduce ferrets, the natural enemies of hares, from the UK. From 1879 to 1883, the number of wild rabbits was effectively controlled for several years. However, one wave after another, ferrets had no natural enemies in the local area. As a result, the number of ferrets increased, and soon there were not enough hares to eat, so they turned to hares. Predating local birds has caused a large number of birds to become endangered. Today, New Zealand has become one of the countries with the most wild ferrets in the world. Ferrets have replaced hares as invasive animals that cause headaches for local people. Therefore, controlling species invasion is a matter that requires great wisdom.

There are also many invasive species in China, the most famous of which is the baby lobster.

Crayfish are native to the United States and were introduced to China at the beginning of the last century.

This animal is not picky about food, has strong adaptability, and reproduces quickly, and it soon began to overrun

. The Chinese people's response is one word: eat! Today, lobster has become a famous street snack as famous as barbecue. It must be cultivated to meet the needs of the majority of foodies. The story tells us two things: 1. As long as the food is edible, it will not become widespread in China. The food that is delicious may become an endangered species. 2. If you want to effectively control invasive species, the best

way is to study how to eat them.