Before reading the article, warm tips: happy fishing, safety first; civilized fishing, cherish the environment; fishing for entertainment, juvenile fishing!
<h1 class = "pgc-h-center-line" > "Olofe" misidentified in the North</h1>
When it comes to tilapia, everyone is very familiar with it, it is the most common in the waters south of the Yangtze River, and even in some places tilapia has been flooded. For friends in the south, tilapia is a common delicacy on the table.
However, many times, the tilapia we see is not the real tilapia, but another sunfish that resembles tilapia and belongs to an alien species. Especially friends in the north, the living "tilapia" we see in the natural waters of the north is actually not tilapia, but a sunfish!
Why are the "tilapia" seen in the natural waters of the north all sunfish and not tilapia? This is mainly related to their living environment.
Sunfish
(1) Tilapia: native to Africa, also known as African crucian carp, is a tropical omnivorous fish, high yield, fast growth, the largest individual can exceed 10 pounds, is one of the main farmed freshwater fish introduced in the southern region of China.
Although tilapia has many advantages, they have one of the biggest weaknesses - they are not tolerant of low temperatures!
Because tilapia is a tropical fish, in the natural waters, the water temperature will freeze to death when the water temperature is about 10 ° C, when the water temperature is significantly lower than 10 ° C, the tilapia in the waters will appear population extinction, so they are in the natural waters of the north, there is no chance of survival in winter!
Tilapia
(2) Sunfish: Although they are very similar to tilapia and belong to the same alien species, they are two different fish species.
Sunfish originate in central and southern America, adult fish individuals are much smaller than tilapia, common individuals between 1 and 2 and a half pounds, the largest individual is only about 4 pounds, and we common sunfish in natural waters, most of them are below 3 or 2.
In addition to the difference in individual size, the biggest difference between sunfish and tilapia is - hardiness!
Sunfish are warm water fish, strong adaptability to water temperature, water temperature at 1 to 38 ° C, sunfish can survive. In the northern waters of Our country, when the winter water temperature is 2 °C, it can still be safely spent in the natural waters.
Combined with the requirements of tilapia and sunfish for the living environment, it is not difficult to see that tilapia cannot naturally survive the winter in the north, while sunfish can do it. The "tilapia" we see in the natural waters of the north is actually a sunfish.
< h1 class= "pgc-h-center-line" > sunfish have entered the Yellow River Basin</h1>
This summer, Sichuan anglers have caught a large number of sunfish from many waters in Sichuan, and the topic of "sunfish 'invading' Sichuan" has quickly appeared on the hot search! The question of whether sunfish can flood in Sichuan has also aroused heated discussion among netizens and even professionals.
In fact, not only in Sichuan, in the southern region of China, in the natural waters of many provinces and cities, the traces of sunfish have long been found, and flooding has occurred in individual waters! For this point, I believe that many anglers in the south have deeply experienced it.
In addition to the southern waters suitable for sunfish to survive, it can also survive the winter in the natural waters of the north, so is there any sunfish in the large waters of the north?
The answer is yes! Sunfish have not only entered the Yellow River Basin from Sichuan, but have also flooded in other parts of the Yellow River Basin.
In Shandong Province, where I am located, it belongs to the lower reaches of the Yellow River Basin. In my hometown, six years ago, I found traces of sunfish in many natural waters such as rivers and reservoirs. Sunfish are now flooded in many waters, causing a sharp decline in the number of other native fish!
In May, just before Sichuan anglers caught a large number of sunfish, my father caught more than 80 fish in two hours in the river near the village, and no other fish were hooked during the fishing, which shows the degree of flooding of sunfish in the river.
In addition to Sichuan and shandong, where I am located, in the henan section of the Yellow River Basin, there are also anglers who have caught sunfish, which means that sunfish have already entered many sections of the Yellow River Basin!
My father caught a sunfish
< h1 class="pgc-h-center-line" > sunfish have been flooded in Japan</h1>
In addition to flooding in many waters in China, as an exotic fish species, it has also been flooded in Japan, and directly led to the disappearance of at least 5 species of native fish in Japan, and even made the beautiful trout endangered!
As early as 1960, Akihito, the Crown Prince of Japan, who was visiting the United States, received a gift from the mayor of Chicago, and this gift was a batch of sunfish.
Because the sunfish has a high appearance and tastes good to eat, Akihito likes the sunfish. After returning to China, Akihito, with a preference for sunfish, immediately promoted breeding in China.
Between 1963 and 1964 , to further expand the breeding of sunfish , they were stocked at Lake Biwa , the largest lake in Japan.
The sunfish that enter Lake Biwa have a population that the Japanese did not expect! Soon the sunfish were no longer limited to Lake Biwa and began to spread to various waters in Japan.
Sunfish, which spread to all areas of Japan, quickly became infested due to their rapid reproduction, few natural enemies, and abundant food.
After the flooding, the sunfish not only squeezed the living space of the native Japanese fish, but also preyed on a large number of native fish eggs and juveniles, which sharply reduced the number of native fish. As a result, at least five species of native Japanese fish disappeared and the trout was forced to become a rare species, allowing the fisheries department to tailor conservation measures specifically for the trout.
<h1 class= "pgc-h-center-line" > the hazards of sunfish flooding</h1>
Any alien species after the flood of indigenous species will affect the ecological balance of the native organisms, squeeze the living space of native organisms, resulting in the reduction or even extinction of the native biological population. As an exotic species, the same is true after the sunfish flood!
In the case of the sunfish flooding in Japan, after the sunfish flood, at least 5 species of native Fish species in Japan became extinct, and the salmon was protected.
Why is there such a great harm after the sunfish flood?
First of all: the breeding rate of sunfish is too fast, squeezing the living space of native fish! Sunfish are multi-spawning fish with water temperatures above 20°C and can spawn multiple times a year.
Secondly: the feeding habits of sunfish are mixed and large, resulting in a lack of food for small native fish in the waters! The lack of food for native fish directly affects growth and reproduction.
Finally: although sunfish are omnivorous fish, they are more carnivorous, preferring to prey on the eggs, juveniles, and even adults of other small fish, hindering the spread of native fish populations.
In short: whether it's living space, food competition, or population reproduction, sunfish pose a great threat to native fish!
<h1 class="pgc-h-center-line" > the Achilles heel of sunfish</h1>
Seeing the results of the sunfish flooding in Japan, thinking of the harm caused by the sunfish flooding, some friends may be worried that the sunfish that have entered the Yellow River Basin will also flood.
In fact, don't worry too much!
Although the sunfish has many advantages in population dispersion, it has a fatal weakness that dooms it to failure after "invading" the Yellow River Basin.
What is the Achilles heel? The meat is tender and has fewer thorns and tastes good! It's simple – delicious.
Although the individual sunfish is small, it is rich in nutrients! Meat contains 18.8% crude protein, 11.5% crude fat, and about 17.7% of various amino acids in dry matter, and is rich in calcium, iron and other trace elements.
In addition, the sunfish is different from the spiny crucian carp, it has fewer small spines except for the large spine spines, which is more suitable for children and the elderly to eat, and is a good nourishing fish.
As for the way to eat sunfish, frying, frying, burning, stewing, etc., all the ways we commonly use to eat it are practical.
With such a tender and delicate sunfish, how can we "foodies" let it flood? I'm afraid that in the future, its fate will also end up like crayfish, relying on artificial breeding!
Regarding the sunfish entering the Yellow River Basin, let's talk to you about this first.
Although sunfish may not flood the Yellow River due to their weakness of tender flesh and few spines, we still need to pay attention to the impact and harm of alien species on native species, and do not release alien species at will!
Finally, I would like to appeal to my fishing friends: small fish, female fish, and roe fish please release! If you need to take it, just one meal is enough! For the future there are fish to catch, do not be greedy!