The alligator gar is expected to be included in the list of key management invasive species, how did

Alligator gars come to our country and other countries outside of North and Central America through ornamental fish**. Unfortunately, people usually buy it, raise it, observe it for a while, then lose interest in it, and then abandon it indiscriminately, or release it freely into wild waters. According to local experts, it is possible that the alligator gar found this time was first raised as an ornamental fish and then released in Danzao Xianhu.

Alligator garMainly living in North American waters, it is not difficult to see that the crocodile eel is an invasive species, in fact, crayfish and bullfrogs are also invasive species, and the scientific name of crayfish is crayfish. The meat of crayfish is delicious, rich in protein and metal elements, and has edible value. But even more notorious is the fact that where the crocodile eel was found, other fish species have also become extinct.

The alligator gar is a ferocious predatory fish that attacks if its prey is less than half its length, and the alligator gar can also be an adult alligator gar"Food"。"The alligator gar does not move when it hunts, and until its prey is close enough, it will bite it like a bullet, agile and fast.

In general, an invasion of a species is acceptable if it does not disturb the local ecological balance, but due to the alligator gar's notoriety, it will certainly have a serious impact on the ecological balance. First of all, as we said earlier, the alligator gar is a carnivorous fish that is aggressive and destructive by nature, and it is nothing compared to piranhas. Although the alligator gar has fangs and is not capable of chewing, it can swallow about a quarter of its size at a time, feeding mainly on fish, although it is not picky and will eat any living creature in the water.

It is understood that there are several main reasons why the alligator gar has gone from being an ornamental fish to a bioinvasive species. First of all, this is due to artificial release into the water. At first perhaps due to the novelty of reproduction, but as the appetite grew, the size increased, it became a predator, and it was considered too expensive to reproduce, it was abandoned and released.

Second, during the introduction and development process, it is indeed inevitable that some fish that slip through the net will escape to the natural waters outside due to weather or other uncontrollable factors.

Since the reform and opening up in the 80s, China has been in frequent contact with countries around the world, so since then, the alligator gar has unexpectedly broken into Guangdong, and then it has grown explosively.

It is because it is smuggled that it invades our country, and this animal is particularly rampant in our country, because our country has no natural predators at all.

Some residents of the country bought these fish for stocking because of their curiosity, which led to their invasion.

In fact, we took the initiative to attribute this thing to our China before, because the ecological chain was destroyed at that time, so we wanted to use it to recover, and we didn't choose to breed on a large scale.

The alligator gar is an invasive species from the waters of North America, and the reason why it enters the country is because of the ornamental fish. For example, some people want to raise fish, but give up later, and now it appears in many places.

1. What kind of invasive organism is this?

This is actually a very ferocious freshwater fish, which belongs to the top of the current food chain, has a relatively strong reproductive ability, and has no natural predators, so it will cause devastating damage. Nowadays, people like to hunt for curiosity, always like to raise some fish that look very ugly or very **, after raising for a period of time, they feel that there is no fun, they will choose to release, this kind of release is a good thing, but I don't know that it will have a great impact.

2. What are the hazards of this invasive species?

The alligator gar is a very dangerous alien creature at present, and it causes many hidden dangers. First of all, eating everything will even lay a highly poisonous fish egg, which will destroy the ecological balance. It is an invasive organism with strong vitality, with a lifespan of more than 25 years, and can survive both saltwater and freshwater ecosystems, and can also breathe air.

Even if it is out of water, it can effectively survive for more than two hours, so it has long been considered an invasive alien species.

3. Where do they appear now?

According to the survey, alligator gars have appeared in many areas of Guangdong today. In addition, it is found in Shanxi, Fujian, Jiangxi, Guangxi, Jiangsu, Wenzhou, Hunan and other places. After investigation, experts found that the main reason for the appearance in the current market is a channel for ornamental fish, which are now widely reproduced throughout the country.

There are some people who choose to breed, but after a period of time and feel no interest, so they will choose to abandon, this kind of behavior, in fact, it is easy to cause many hidden dangers, and the later may cause a large number of reproduction, so it is recommended that you do not do this.

It is an invasive alien species from Russia, which has seriously disrupted the balance of the ecosystem and led to the extinction of many species.

From North America. It entered China as an ornamental fish.

The alligator gar is not a protected animal. The scales of the alligator gar are similar to crocodiles, "deep mouth fissures, sharp teeth", slender body, is an alien species, belongs to the largest and most ferocious of the seven species of gar in North America, and is currently mainly distributed in the Gulf Coast, Mississippi River and other places. Previously, Cretaceous gar fossils dating back to about 100 million years ago have been found in Europe and other places, so they are called "prehistoric monsters".

The alligator gar is a carnivorous fish, nicknamed "freshwater killer", which is extremely harmful to freshwater fish. The alligator gar is extremely aggressive, and its scales are comparable to "armor", which can protect it from being easily injured, causing it to become a creature that stands at the top of the freshwater food chain. Alligator gar can defecate while eating, can eat dozens to hundreds of catties of freshwater fish a day, and there are almost no natural enemies, if released into the domestic freshwater river, it will seriously affect the ecological balance of the freshwater basin.

Alligator gar is not a good animal, let alone a protected animal, it is harmful to the river, and it is not recommended for people to keep it.

In fact, the alligator gar is also called the "lucky crocodile", this animal has actually lived on the earth for hundreds of millions of years, because it looks particularly like a crocodile, so it is called the alligator gar. Unlike other fish, which have almost no teeth in their mouths, the alligator gar has a mouth full of teeth. And the alligator gar has very sharp teeth, which can easily cut through its prey**.

The scales on the alligator gar are very hard. Therefore, very few animals can bite through the scales on its body, so there are basically no natural predators in the country.

The alligator gar is actually a carnivore and has a very strong attack power. It will often catch some small fry in the water. They may even catch other animals on the water, including ducks or waterfowl.

It is enough to see how strong the attack power of the eel crocodile is. Gars can grow to a very large size, reaching about two meters in size when they reach adulthood. And the male alligator gar is much larger.

The life span of the eel crocodile is also relatively long. Some alligator gars have survived for decades now, even longer than humans.

Its eel crocodile is not a native species of our country. It's actually an invasive species. And the reason why it appeared in our country is because in the last century, the alligator gar belonged to an ornamental fish, and when the alligator gar was introduced into our country, it was not expected that this fish would be so harmful.

Therefore, many eels and crocodiles escaped to the wild at that time. There are still many people who don't know that the eel crocodile is an invasive species, so they release all these eel crocodiles, resulting in an increasing number of eel crocodiles, especially in Guangdong.

Eel crocodiles are very ferocious in the water, and even like piranhas, they will attack humans. And the eel crocodile can eat more than a dozen catties of other fish a day, so the eel crocodile is very harmful to China's native fish, but because the meat of this fish is not delicious, basically no one wants to eat the eel crocodile, so I also hope that if the eel crocodile is raised at home, then do not release it at will.

This is an invasive alien organism, this creature grows very large, has no natural enemies in some rivers in our country, has a very long lifespan, eats some fish, and has very sharp teeth.

The alligator gar is a fish from North America. They are generally larger, have harder scales on their bodies, and have very sharp teeth. This fish is difficult to catch, but it was once endangered because it attacked humans and was hunted by local residents.

Later, due to the proliferation of Asian carp in North America, people took advantage of the fact that the alligator gar eats everything, and successfully controlled the Asian carp population.

This is a very dangerous creature, this creature can cause a certain amount of harm to humans, and then it also threatens marine life.

The alligator gar is endemic to North America.

Therefore, their range is also concentrated in North America, and the alligator gar is distributed on the Gulf Coast from Mexico to the United States, the Missouri and Ohio rivers, Nicaragua, etc.

This is a giant gar of the genus Giant Gar, a giant freshwater carnivorous fish that lives in North America and is the largest of the species in existence.

It is a fish that is very lethal and has a strong ability to survive.

It is a relatively terrifying species, basically without natural predators, and has a particularly flexible body with a large mouth.

It is understood that there are alligator gars in Guangdong, Fujian, Jiangsu and other regions, and experts said that they should be. The alligator gar is included in the list of national key management invasive species, after all, this species is harmful to China. It came to China because of its strange shape and fierce character, and was lured to China by some as an ornamental fish, but then the fish grew too large to be domesticated, so it was discarded or released artificially.

The alligator gar is a special product of southern North America, a prehistoric fish, the largest of the existing gars, up to 3 meters long, and is a giant carnivorous fish. This fish is very ferocious, with sharp teeth in its mouth, and its attack power is very strong, like a crocodile, it can pounce directly on it and bite its food, so it is called alligator gar. In China's river basins, it eats almost all the fish, and if it is mistakenly released into the farm, the farmer will lose no money.

Alligator gars have hard teeth, gall bladders and eggs that are highly poisonous, making them difficult to eat. So alligator gars have little economic value and can cause damage to biological systems in China and the sea. <>

In the early days, this alligator gar was discovered by the Chinese, and in order to satisfy the curiosity of human beings, people introduced China from the distant Americas as an ornamental fish. In the beginning, the alligator gar had smaller fry, but later it grew faster and became longer, and there was no room for such a large fish in the average person's home, and it had a fierce personality and a large appetite, which was difficult for ordinary people in the family to raise. Due to the lack of supervision, the fish is discarded in the middle and late stages, and when the climate conditions in the Pearl River region are suitable, the alligator gar quickly multiplies, and soon occupies most of the river.

Originally, the alligator gar was still very rare, but later it reproduced faster and faster, and it was almost common in the middle and lower reaches of the Yangtze River. As an invasive alien species, the alligator gar rarely encounters natural predators and is difficult to manage. Coupled with the fact that it does pose a hazard to China, experts recommend that it be included in the national list of key management invasive species.

Alligator gars were introduced into China from abroad, enriching the biodiversity of our country.

Because this fish can be bought for ornamentation, the supervision of this piece is not particularly strict, so it came to our country.

It may be due to the influence of the natural environment that they fled to our country, which caused the invasion of these species.

There are seven species of gars in one family, two genera, and live mainly in North America and the Caribbean.

Gar Lepisosteiformes (Lepisosteidae) Gar family Lepisosteidae

Great gar genus Atractosteus

Atractosteus spatula (305 cm), commonly known as alligator gar and crocodile.

Cuban gar Atractosteus tristoechus (200 cm), commonly known as the crocodile.

Tropical gar Atractosteus tropicus (125 cm).

Gar genus Lepisosteus

Spotted gar Lepisosteus oculatus (112 cm), commonly known as spotted gar.

Lepisosteus osseus (200 cm), commonly known as sharp-tailed gar, alligator rocket, platypus.

Lepisosteus platostomus (Short-nosed gar 88 cm), commonly known as short-billed gar, alligator rocket, short-nosed gar, short-billed alligator.

Florida gar Lepisosteus platyrhincus (132 cm).

Soisson gar Lepisosteus suessionensis [fossil species].