ChangJiang jun: With the development of modern aquaculture, the artificial breeding technology of aquatic products is becoming more and more mature, and there are often various hybrid odd fish and strange fish.
Recently, in Guangzhou, Guangdong Province, there was a fishing enthusiast who caught a strange "new fish species" while fishing in the Pearl River, which the angler had never seen before, thinking that it might be a "hybrid strange fish"...
<h1 class="pgc-h-arrow-right" data-track="36" > the Pearl River catches strange fish, like a variety of fish hybrids</h1>
“..... When I first caught it, I didn't pay attention to putting it in the bucket, and when I packed up my things and prepared to go home, I found out how this fish was so strange, like crucian carp and carp, and a bit like Wuchang fish, but the scales were strange and couldn't say...."..."
Master Xiong, an angler in Guangzhou, said that he had been fishing in the Pearl River for many years and had never seen such a "strange fish".
- This fish has the characteristics of a variety of fish, and it looks like a hybrid of a variety of fish, and at first glance it has the characteristics of several kinds of fish such as carp, crucian carp, bream and so on...
<h1 class="pgc-h-arrow-right" data-track="7" > is this a new species? </h1>
ChangJiang Jun: The "strange fish" caught by this Guangzhou angler in the Pearl River is indeed a "new fish species", but it is not a "hybrid strange fish" cultivated artificially, but an exotic species introduced from the Americas - the Brazilian seabream, because of its size like a native crucian carp, folk also known as "Brazilian crucian carp".
The so-called Brazilian crucian carp scientific name striped carp, its origin is the La Plata Basin in South America, and with the development of aquaculture in the Americas, Brazil, Paraguay, Argentina and other countries have their larger populations in lakes, bends, reservoirs and other waters.
The striped mud carp is the main economic fish in Brazil, introduced in the country in the 1990s and mainly cultivated in the southeast.
"Brazilian crucian carp" - scientific name striped carp carp
However, this popular economic fish in Brazil has been quite a "failure" in China's fish market, so many farmers have abandoned the striped carp to escape into the natural waters of the southeast.....
It is said that the fish is fatter, more prickly, and it is easy to die from the water, and it will stink in a short time.
<h1 class="pgc-h-arrow-right" data-track="33" > Brazilian crucian carp adapted well after invading the Pearl River system</h1>
The Yangtze River Jun has been popularized many times, and the Pearl River system in Guangdong has a mild climate, which is a "hotbed" for the invasion and reproduction of alien species.
This is true for Brazilian crucian carp, where climatic conditions are similar to those of their origins, so they adapt well and begin to thrive after escaping from farming and artificially releasing into the Pearl River.
Some people have even caught several pounds of "Brazilian crucian carp" in the Pearl River.
Therefore, this "Brazilian crucian carp" actually has a certain wild species group in the Pearl River system today, and from time to time anglers encounter them while fishing.
However, because this "Brazilian crucian carp" is not well known, many fishing enthusiasts often mistake it for local crucian carp, carp and other fish when caught, or like the guangzhou fishing friends above, they think that it is a "hybrid monster fish" that is artificially bred.......
<h1 class="pgc-h-arrow-right" data-track="38" > it was predicted to flood</h1>
On the other hand, Changjiang Jun learned that this "Brazilian crucian carp" has also begun to appear frequently in the fish catches of fishermen in Guangdong, from the Xijiang River upstream to the downstream near the Pearl River estuary, which shows the invasion momentum of this fish.
In fact, as early as a few years ago, some fishermen predicted that the "striped carp" would become the next "Rusta wild carp" - that is, the alien species of Thai mud carp, which was introduced from Southeast Asia, and now it is almost flooded in the Pearl River system.
Fishermen catch selected Brazilian seabream
However, Yangtze River Jun believes that this is actually unlikely to happen - this is because the striped carp, although it multiplies rapidly, has a "fatal wound": fear of cold.
And in the eyes of the Yangtze River Jun, this Brazilian crucian carp is not generally afraid of cold!
For example, tilapia is also considered a tropical fish species, but in fact, it can survive the winter in Liangguang and even Jiangsu and Zhejiang, and it is rare to freeze to death in groups.
Tilapia can flood the rivers of Guangdong because they can survive the winter safely
But this "Brazilian crucian carp" is not the case, once the temperature is below 12 ° there is a risk of freezing to death, and some fish tanks farmed in the population, when the temperature is below 10 °, the mortality rate is almost 100%...
Therefore, in the wild environment, the striped carp, first of all, its distribution range is strictly limited, probably only in the coastal warm areas of Guangdong, Fujian, Hainan can survive, and secondly, even in the above areas, the striped carp has the risk of freezing in winter.
Some people make it an ornamental fish, but it is very easy to "freeze to death"
Under these constraints, it is almost impossible for Brazilian crucian carp to flood like the "Thai crucian carp" – unless it has evolved to be resistant to cold...
In fact, one of the results of the development of modern aquaculture industry is that there must be a "big confluence" of fish species around the world, and there may be more and more incidents like "Brazilian crucian carp" similar to new fish species in China's rivers.....
Old drivers, have you ever seen this strangely sized "Brazilian crucian carp"?