With the development of globalization, exchanges between countries are becoming increasingly close. Although this exchange has brought about economic prosperity, it has also brought about some potential crises, that is, " biological invasion " , which has been mentioned in recent years. After entering our country, these "uninvited guests" have shown strong combat power.
Water hyacinth that once flooded the waters of southern my country
However, if we want to say that the most successful species invaded our country is not these organisms that often appear in the news. has been thriving in southern waters for 40 years, but is often mistaken for grass carp "Merigala" .
The seemingly ordinary merigara
arrogantly "invasive species"
First of all, let's first review what invasive species have performed extremely arrogantly in our country in recent years.
The first one is Canada Yellow Flower , which was in full swing before. When the news reports introduced this invasive species, specifically used the description of "the flowers in the blooming place" of , which is enough to see the bad influence of this guy.
The original name of a Canadian yellow flower is Huangyan or bullying grass. In 1935, it was introduced into my country as an ornamental plant . At first, people just liked its beautiful color and appearance. Unexpectedly, its rhizomes were very developed and their reproductive ability was quite strong. could easily seize the growth space of other plants. . It feels like this guy has become a bully among plants just like the Japanese knotweed that invaded the UK.
"Devil's Flower" - Canadian yellow flower
The second is red fire ant , which frequently appears in the news due to injury. This kind of ant , whose hometown is in South America, not only has a reproductive ability beyond imagination, but is also outrageously aggressive. People who are bitten by it will experience various discomfort symptoms and even endanger their lives due to the effects of its toxins.
Therefore, many places currently carry out special operations to clean up red fire ant nests every year. Although it is difficult to eradicate roots, it must also suppress them to a certain extent.
Related personnel are taking medicine to the red fire ant nest
Finally, it has become one of the fish that countless people hate the most. scavenger . This kind of ugly fish that is said to have eaten garbage has occupied many waters in southern my country. The government will also organize salvage operations in some areas where is seriously flooded. After all, their existence has deeply threatened the survival of local species.
Scavenger with too tenacious vitality
or above these invasive species have attracted people's attention very early on due to their extremely arrogant behavior. Although we cannot completely eliminate them at present, , with attention and killing actions, the expansion of these creatures will not be as easy as before .
However, when everyone feels that these hateful invasive species have been pulled out through census, there is also a hidden invasive species that is hiding deeply indigenous communities. It is a fish that has been thriving in southern waters for 40 years but is always recognized as a local grass carp - Mairegara ling .
So, how did this guy invade our country? Why is it called the most successful invasive species?
Marigala marshal's body structure diagram
"Low-key" Marigala marshal
Marigala marshal marshal commonly known as Marigala marshal. It is a fish under the order and japanese family. Judging from the genus of the marshal in the biological division, it can actually be considered a relative relationship with my country's marshal.
In the 1980s, the four major breeding fish in India, Mairegara lin was introduced from India by the Pearl River Fisheries Research Institute , and became an important economic fish species in many provinces such as Guangdong Province and Fujian Province.
The main producer of merigara till
At first, everyone gave high hopes on this kind of fish, so compared with the scavenger fish that were accidentally introduced and bred into the water, marrigara till was treated quite well at that time, because people wanted to make a lot of money using it.
Judging from the characteristics of Mairegara, this guy has a wide food, fast growth, large size and strong adaptability. It can be seen that although it is an introduced species, it is not "sexy" at all, and it is very in line with the needs of farmers .
000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 In general, is still relatively cost-effective to maintain .
In addition, if the Maligara turtle is compared with our local turtle, its advantages will be even more obvious. It grows very fast, and often only needs to be raised in less than half a year to meet the standards for sale. This kind of rarely causes death on the , whether in mountain ponds or rivers, it can survive smoothly.
Marigara Lamb's production cycle
It is precisely because of the above characteristics that Marigara Lamb's production cycle is out of control after entering the wild. More importantly, is a guy who is very good at "disguising himself" .
Compared with other large-scale invading alien species, Maigalali is very low-key and often mingles among various indigenous fishes, making you unable to notice that it is an "uninvited guest" from India.
You should know that people will always be alert to familiar creatures, especially when looking at fish. As long as does not look like a scavenger fish or gar , it is difficult for everyone to tell which fish it is . In this way, the "fake" Mairegala, who is often mistaken for grass carp, is thriving better and better in the waters in southern my country.
A kilogram of wheat grass can produce hundreds of thousands of fish eggs
It is not difficult to see that although has chosen a completely different path from other invading organisms, it is indeed the best , which is the best . Why do you say that?
Because it has been thriving in southern waters for so many years, it has expanded its invasion map more and more, but people have not noticed . This is like a spy who has been hidden for a long time. It will not cause large-scale harm in particular, making you feel annoyed. But it will work hard to accumulate strength behind its back, and after completing its invasion target, it will pop out and tell you that it is actually an invader. is undoubtedly the screening and identification mechanism we are proud of when rubbing under our feet.
Metta carp can be called a "disguised expert"
So, does Mairegala carp really look particularly similar to grass carp? What impact will its existence have on other indigenous fish?
"Perfect Pretender" Mairegara liang
When we compare Mairegara liang and grass carp, will find that although the two are indeed very similar in size and appearance, they can still distinguish between them from the subtle differences .
First of all, from heads , although the merigara turtle is already very large, , our indigenous grass carp is often larger . In this case, if you catch fish weighing more than 20 kilograms, you don’t have to worry about not being able to tell the difference. Because no matter how capable the Mairegara is, it is difficult to grow this weight.
Grass carp can grow to about 40 kilograms
Next, from the appearance of , the fish scale distribution of the two does look no different. But if you look at the color carefully, will find that the back of the merrigara tummy is mostly dark gray , while grass carp is yellower.More importantly, the color of the fish eye of the grass carp is obviously different from that of the merigala. The eyes of this guy are "red" , which looks very eye-catching.
0 The appearance of wheat grass and grass carp
Finally, taste . Compared with grass carp, marigala grass has a not-so-sense taste, and its economic value is far from keeping up with grass carp . So now some businesses will also sell "real and fake". Anyway, because everyone doesn't know how to distinguish, they can sell Merigala under the grass carp's signature. Of course, if it is distinguished by taste, will be stewed when you buy it home, so you won’t have a chance to find someone to reason with .
To sum up, before you know the difference between the two, merrigara ling is indeed a perfect disguise . And because it is not as harmful as scavenger fish and gar, people often ignore it.
However, according to the research of Yu Fandong, a scholar at Shanghai Ocean University , the invasion of Mairegara will still have an impact on local fish . In this influence, grass carp is actually not the first victim. The earthy carp mentioned above, which is related to it, is the unknown "subordinate".
Since they are both ras, the growth environment and feeding preferences of marigala and rasp are basically the same. Although this guy will not blatantly persecute the earthy carp, he can squeeze the living environment of the earthy carp by his own advantage of growing fast and growing big.
Comparison of appearance of wheat grass and turtle grass
In this case, the food of turtle grass is becoming less and less, and the population of will definitely be greatly affected by .
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