With the global warming, the change of the ecological environment, the frequent trade exchanges between countries in the world, and the invasion of alien species have become common. Especially in recent years, the number of invasive alien species in China has shown an upward trend, and it has also become the country with the most serious harm from alien species invasion in the world. The proliferation of new species in China not only endangers China's biodiversity, but also the safety of the ecological environment is also extremely seriously affected.
<h1>American table regular "red fish" is eaten to the point of extinction</h1>
American redfish is also known as "red drumfish, spotted reeds, etc.", the appearance of the whole redfish is very similar to the perch, the body shape is spindle-shaped, the abdomen of the fish is reddish, and the back of the head has a dark oblique band from the beginning of the dorsal fin to the end of the snout; when the fish is young, there are saddle-like spots on the tail stalk. Redfish are mainly distributed in the Atlantic region of the United States, and are carnivorous omnivorous fish that can adapt to a variety of feeds. Compared with other fish, the biggest difference between redfish is that it is highly resistant to disease, grows quickly, has a high survival rate, and no matter how harsh the ecological environment, as long as there is water, there will be redfish. Red fish taste delicious, edible taste is more delicious, there is no thorn, the meat is relatively fat, but also has a rich protein, coupled with the red fish fat content is relatively low, deeply loved by foreign friends, especially on the American table, red fish is a common ingredient.
It is worth mentioning that in the 1980s, red fish began to become popular in the United States because of "delicious taste", and the american love for red fish reached the point of obsession, and some American small-town residents were almost inseparable from red fish, in their eyes, this red fish is cheap, high nutritional value, and is deeply liked. In just a decade, redfish in the United States has been eaten to the point of extinction, in the process of cooking redfish, Americans have a variety of methods, whether it is barbecue, or smoked, redfish in the United States is very popular, due to the large market demand, slowly in the United States wild redfish has been overfished, the number has dropped sharply.
According to relevant anglers in the United States, "In Florida, whether it is fishing or fishing, redfish are on the verge of extinction. Nowadays, it can be very difficult to catch wild redfish. Seeing that redfish were on the verge of extinction, the Florida government began to issue relevant policies to refuse overfishing, limiting each person to only one fish, and only allowing redfish with a body length of 46 to 68 centimeters. But even so, the number of redfish in the United States is still decreasing, and many merchants have begun to continuously carry out artificial breeding, which has temporarily alleviated the wild resource problem of redfish in the United States to a certain extent.
<h1>Chinese nightmare: the American redfish invaded in a reverse direction and flooded the mainland</h1>
China's vast territory, rich in biological resources, in recent years, it is true that it is often affected by the invasion of alien species, but compared with it, the United States is more tormented by biological invasions, such as Asian wild boar, Asian carp, Burmese python, tumbleweed, etc., but the red fish that was once popular in the United States or even endangered have "reverse invasion" in China. Some netizens can't help but ask: "Why do American redfish flood in China?" ”
1. Introduction of artificial aquaculture redfish technology
Since the United States began to breed artificial breeding of red fish, this species began to enter the aquaculture of the high-speed express road, countries around the world have introduced excellent varieties of redfish, in the late 1980s, China's Taiwan also joined the redfish artificial breeding team, since then in Hainan and Fujian and other regions have begun to appear large-scale breeding of redfish. Gradually, the American redfish began to adapt to China's ecological environment, and entered a long-term "residence" state, and also became an important breed of aquaculture aquatic products. Compared with other fish, red fish not only grow fast, but also reproduce quickly, and after entering the nineties, red fish began to be listed in large numbers and appeared on people's tables.
With more and more farmers, the production of red fish is also in the forefront, this active ecological species once encountered typhoons, heavy rain and other bad weather is very easy to occur "escape from prison" situation, so red fish "jailbreak" is also inevitable, but once into the river and other places, the number of red fish will increase. Because it has a strong ability to adapt to the ecological environment, it is the most able to grow normally in seawater, fresh water, or brackish water environment, no matter what kind of water resources, it has good adaptability for redfish.
2. Influenced by traditional thought, the artificial release of red fish, the meaning of blessing is quite profound
For some Chinese, especially those who have been engaged in business for a long time, they are influenced by traditional ideas, attach great importance to "release", have a strong attachment to the release of life, and feel that the more aquatic the animals are released, the more spiritual they are, and the more meritorious the release behavior, pray for spiritual experience. Every day, various release dramas are staged in turn, and the released animals are also diverse, from roe to grass carp, from loach to grass turtles, from poisonous snakes to piranhas. Everything in the world can be released. The red fish is also a creature released from it. In June 2015, more than 20 mysterious people released about 10,000 American red fish at Jimiya Pier in Jiaonan City, and thousands of fish competed on the surface of the sea, and from time to time fish jumped out of the water, attracting hundreds of citizens to watch.
From the current point of view, the flooding of red fish in China is directly related to this kind of release behavior, with the release of red fish in the form of innovation, from the previous fixed place release, to play "release guerrilla warfare", more and more people have begun to join the release of the team, it seems that in the minds of these releasers has formed a set of deification theory, they put their released animals in the heart as immortals, by superstitious ideas, red fish in our country flood situation is grim. From the relevant survey data research, from 2004 to 2006, China's fishermen have caught more than 10,000 kilograms of American redfish, and now the redfish has adapted to the wild environment, a large number of breeding, from artificially farmed redfish to wild American redfish.
<h1>In addition to the American redfish, what other aquatic species have invaded our country? </h1>
In the 1990s, China's introduction of foreign fish species reached a climax, according to incomplete statistics, China has introduced more than 65 species of fish from abroad, of which 8 species of carp. In addition to the flooding of Redfish in the United States in China, there are also eels from North America in China has also appeared flooding, garnet is a large ferocious freshwater fish, will attack other fish, and feed on other fish, and piranha pomfret and called "water killer", has a serious impact on the ecological environment of water resources.
In addition, scavengers have also had a serious impact on the ecological environment of our country, especially in the southern region, where scavengers are flooded, it is an omnivorous fish, mainly raised in aquariums to clean moss, algae, benthic animals and garbage in the water. But if this fish multiplies in large quantities, it will devour other fish eggs, leading to the extinction of other fish. At present, there are no natural enemies in China's scavengers, and once they appear in natural waters, it is easy to lead to the extinction of native fish.
Among the many invasive aquatic species, there is also a type of fish that looks very much like crucian carp in appearance, but it is not crucian carp but green sunfish, it is extremely invasive, and it belongs to warm water fish. As the climate warms, the fish has gradually spread in cold-water streams in mountainous Areas of the United States. Green sunfish like to spawn in areas with slow water and gravel, and the most terrifying thing about this fish is that it will eat other eggs and small fish, whether it is an adult green sunfish or a cub, it will pose a great threat to other fish species.
<h1>What kind of harm can the invasion and flooding of aquatic product species cause to Our country? </h1>
1. Extinction of native species
With the frequent intensification of trade exchanges between countries, it is an inevitable trend for species to break the local ecological boundaries and flood. Invasive alien species have the characteristics of strong ecological adaptability, strong reproductive ability, strong transmission ability, etc. With the large number of alien species multiplying, after the number is intensified, the native biodiversity will gradually be lost, and the species invasion destroys the original ecological environment, so that the native species have become extinct. For example, scavengers were originally introduced to our country as garbage fish, but they did not expect that this species could live even in harsh water, and continue to grow their own group, and finally flooded. Scavengers are very destructive, not only eat aquatic plants and algae, but also the eggs laid by other aquatic animals in these places, which in the long run can easily lead to the danger of extinction of other fish species.
2. Affect the stability of the natural ecological environment
The invasion of redfish in the United States has completely broken the balance of the species structure of China's original ecosystem, and its invasion is difficult to control. In addition, the invasion of other fish species has also caused serious damage to China's ecological environment, such as the introduction of new silverfish in Taihu Lake, resulting in a continuous decline in zooplankton, and a large number of aquatic weed areas in the lake, which has a serious impact on the ecological environment.
3. Cause regional germ invasion
At the same time as the invasion of foreign aquatic fish, we can not ignore another serious problem, that is, the germs carried by these invasive fish themselves will also invade, causing more organisms in China to be affected. For example, the most common grass carp hemorrhagic disease in China is a serious infectious disease, from 2.5-15 cm size of grass carp can be diseased, sometimes more than two years of large grass carp also sick, this disease incidence is high, mortality is also high, are regional pests and diseases, the reason why this situation occurs, is due to aquatic fish invasion caused.
The invasion of alien species not only has a direct impact on aquaculture and agriculture, but also deeply affects the urban ecological environment. For the problem of alien biological invasion, we should adhere to the principle of combining prevention and control and focusing on prevention, focusing on forward-looking and preventive work, which is conducive to preventing problems before they occur. In the matter of species invasion, we must not be accomplices, blindly choose to release, and forget to protect our ecological environment.