300 kilograms, super pigs invade Canada, there are more people than people, two million pigs are not eaten?

Wild boars are not a native species in Canada. The current overpopulation of wild boars is caused by the Canadian government. Moreover, the invasion of wild boars in Canada is definitely a negative example!

The causes and consequences of wild boar invasion in Canada

In the 1980s, in order to improve the meat quality of local pigs and increase the proportion of lean meat in pork, Canada introduced European wild boars and crossed them with local pig breeds. The results are actually good. This kind of hybrid pig has been operated similarly in China. The meat quality has indeed improved, and everything is moving in the direction everyone imagined!

However, the domestic demand for meat in Canada began to slow down in the 1990s. A large number of wild boar and domestic pig hybrids were unsaleable, and the high breeding costs brought the farms to the brink of bankruptcy. In order to reduce costs and increase income, some Pig farms put hybrid pigs into semi-open farms and invite hunting enthusiasts to hunt wild boars.

I believe everyone can guess what happened next. The wild boar ran away from the farm. Of course, there is also information that some bankrupt pig farmers directly released the wild boar into the wild. In short, the wild boar ran away from the farm. In the wild, in fact, in the 1980s, Canada had already heard about the overpopulation of wild boars in the United States, because European colonists brought wild boars into the United States in the 19th century, and by the 1980s, the problem of wild boars had long been resolved. When the United States was in a state of panic, the Canadians didn't seem to take it to heart.

The development of the four periods in the United States was already serious in the 1980s

In fact, their indifference seems to make sense. For example, there are now more wild boars than people in Saskatchewan. Chewan Province, the southernmost latitude is also 49 degrees, which is equivalent to the latitude of Heihe City in the Lesser Khingan Range region of my country. The coldest winter can reach minus 40 degrees, such as Prince Albert in central Saskatchewan, in February 2021 The weather forecast for March 26th is as follows:

Everyone knows that it is no longer the coldest time, and the coldest temperature is easily below minus 40 degrees, so officials from the Canadian Ministry of Agriculture are optimistic that these people who have escaped from the wild The wild boars in Canada simply cannot survive the winter, so they turn a deaf ear to the misfortunes in the United States. It is obvious that the development of wild boars in Canada far exceeds their optimistic estimates!

Domestic pigs are okay in the ice and snow

It only takes 30 years to give you a Canada full of wild boars

From the 1990s when wild boars really started to develop to now in 2021 In just 30 years, wild boars have not only adapted to Canada's severe cold, but have also tended to occupy Canada. From British Columbia to Quebec, from Ontario to Saskatchewan, they have spread throughout the lower latitude areas of the US-Canada border. .

Data map of the paper in the Nature sub-journal "Scientific Reports"

Canada's wild boar problem has made a fuss in the top journal "Scientific Reports", a sub-journal of Nature, but as a A case is used:

Screenshot of the paper

How to quickly and effectively monitor and map the distribution of invasive species, and the Canadian wild boar has become a negative example. The rapid growth of wild boar, It will occupy wetlands and river valleys, seriously crowding out the native species that were originally there. Once it takes hold, the consequences may be unmanageable.

Ryan Brook, an associate professor at the University of Saskatchewan, believes that if you don’t drop everything you are doing and immediately concentrate on dealing with the wild boar problem when you find traces of wild boars, you must be crazy. In fact, when wild boar traces were first discovered, Saskatchewan officials were slow to deal with them. Now the number of wild boars in Saskatchewan is greater than the total population of the province (the number of wild boars exceeds 1 million). ), and now it is showing its signs in Ontario, but it is foreseeable that according to the urine of Canadians, it is only a matter of time before the number of homeowners in Ontario is overrun.

How many wild boars are there in Canada?

No one may be able to explain this issue clearly. The reproduction of wild boars has obviously exceeded the estimates of the Canadian authorities, and the super-high reproduction rate of wild boars directly dumbfounded the authorities. The gestation period of wild boars is 114 days, and one child is born. They can give birth to about 12 piglets at most, and they can reproduce twice a year. How many piglets will they have in ten years?

Of course this is a math game and is different from the actual situation in the wild, but the surge in the number of wild boars in Saskatchewan is a fact, because it is estimated that the total number of wild boars in the province has exceeded 100 Thousands of animals, Saskatchewan-based Canadian Broadcasting Corporation wildlife columnist Brian Keating called it an ecological disaster.

In southern Saskatchewan, cities where wild boars have been found are shown in red

Due to the rapid increase in the number of wild boars, many wild boars have left the forest to forage in the countryside. It eats everything, destroys crops, destroys farmland, and seriously damages crops such as wheat, corn, and oats. A single wild boar can destroy 4 hectares of land. It also poses a serious threat to birds and reptiles and small mammals that breed in the trees. Because wild boars are omnivores, hungry wild boars will walk onto the road and cause traffic accidents. Wild boars weighing 100 to 200 kilograms (up to 300 kilograms) may also attack humans.

In response to the overpopulation of wild boars, Canadian authorities declared that wild boars are not game animals, but pests. Canadians can kill wild boars without permission, and have established incentive measures since 2003. Since the beginning of the year, several provinces in Canada where wild boars have invaded the most, such as Alberta, have encouraged residents to hunt wild boars, and the price of wild boar ears is $50 per pair

Wild boar products

Canada has also developed wild boar recipes to market to tourists coming to Canada, but this sporadic hunting and unstable sales have not helped increase the number of wild boars. The number of wild boars in Canada still grows by more than 9% every year.

Trapping wild boars

According to a paper in Nature, most of Canada’s wild boars are concentrated in Saskatchewan, accounting for more than 50% of the country’s total. According to this estimate, The number of wild boar in Canada is about 2 million, but it has now spread to other provinces on the US-Canada border, and more numbers are still not effectively counted, so the actual number may be higher.

Similarly, the proliferation of wild boars has also caused more than 1.5 billion US dollars in losses to the 38 states south of 36° north latitude in the United States (as of February 2020, there are approximately more than 7 to 8 million wild boars in the United States). Unlike Canada, the United States introduced European wild boars in the 19th century for hunting and breeding needs. However, what is puzzling is that there is a precedent for the proliferation of wild boars in the United States, while Canada introduced European wild boars again in the 1980s. People know what they think, are there really no ecologists who have evaluated it?