With the migration of aquaculture and climate change, the problem of invasion of alien species is spreading to inland areas.
For example, in Pingxiang, Jiangxi, when a fishing enthusiast was fishing in the reservoir of his hometown, he caught a large number of strange fish with "gorgeous appearance", which the local people seem to have never seen before.
Most of these fish are 3-5 pounds a piece, which looks like a combination of carp and grass carp, but the fins and tails are brightly colored, and they are obviously neither carp nor grass carp.
After seeing it, the local villagers also said that they had never seen this "strange fish"...
<h1>What kind of fish is this "gorgeous" monster fish? </h1>
This is an alien species that has become more and more common in China in recent years, "Rusta wild carp", belonging to the subfamily of carp under the order Cyprinid, and is commonly known as "Thai carp" and "Thai carp" because it is native to Thailand, Vietnam and other Southeast Asian regions.
In fact, although Thai mud carp is an exotic species, because of the long period of introduction (first introduced from Thailand in 1978), in Guangxi, Guangdong and other mild climate areas, Thai mud carp has formed a large and stable population in natural rivers in the wild.
For example, in the main stream of the Pearl River and the tributaries of the Xijiang and Yongjiang rivers, Thai mud carp has become a "conventional fish species", and the number is extremely large, and fishing enthusiasts in these areas should have a deep understanding.
(It is common to catch Thai carp in the Pearl River system)
However, because the Thai carp itself belongs to the subtropical fish species, it is still relatively rare in the colder areas of hunan, Jiangxi and other inland areas.
Therefore, like the fisherman above, it can be said that it is very abnormal to catch so many Thai carp at once in the reservoir.
——Changjiang Jun consulted the aquatic literature and found that the most suitable temperature of Thai mud carp is about 32 °, below 15 ° the activity is reduced or even does not spawn, and like the above inland areas, generally speaking, the temperature is below 10 ° for a long time in winter.
(Theoretically, the inland areas of Jiangxi are not suitable for Thai mud carp to survive)
So why is there such a large population in the reservoirs of Jiangxi?
<h1>May be due to climate warming</h1>
In fact, according to The Yangtze River Jun, the emergence of Thai mud carp in inland areas such as the middle and lower reaches of the Yangtze River is not a new thing.
For example, in some reservoirs in Xiangxi, Hunan, the Ganjiang River basin in Jiangxi and the Han River basin in Hubei, there have been records of fishing enthusiasts and fishermen catching Thai mud carp in recent years – in the past, these areas were considered unsuitable for Thai mud carp.
(Thai mud carp populations are spreading inland))
The fact that the observed facts do not correspond to aquatic common sense indicate that the situation has changed.
Although there is no aquatic expert to do in-depth research and analysis of this, but Yangtze River Jun believes that the reason behind it is the increasingly intense "climate warming" - in recent years, "warm winter" in various parts of the south has become more and more common, and the duration of low temperatures has become shorter and shorter, such as this year, Jiangxi, Hunan and other places have not yet passed the New Year, the temperature has risen to more than 25 °, which is a historical rarity...
This change in the general environment is simply a catalyst for the "population outbreak" for the thai mud carp, an alien species with strong survival ability and reproductive ability.
Therefore, if the fry of Thai mud carp appear in reservoirs and lakes in Jiangxi, Hunan, Hubei and other regions, with their strong reproductive ability, they can multiply rapidly in a few years.....
<h1>What is the impact of thai mud carp invasion? </h1>
Friends who often read Yangtze River Jun's articles should know that we have always been very concerned about the trajectory and impact of alien species invasion.
What about the invasion impact of an alien species like the Thai mud carp, which reproduces rapidly and is "huge"?
ChangJiangjun believes that the impact on local similar fish species is larger, such as carp, grass carp and other fish species with similar feeding habits, which will face a lot of competitive pressure.
However, the Thai mud carp itself has a mild temperament and high edible value, so its impact on the overall river ecology should be much smaller than that of ferocious alien species such as tilapia and scavengers.
Netizens, have you appeared in this "Thai carp" locally?