The invasive species not only destroys aquatic flora and fauna literally down to the bottom gravel, but also weakens embankments and releases toxins deposited into the soil.
The red marsh crayfish (Procambarus clarkii) is one of the biggest ecological threats to Hungarian waters: it originally comes from South America, but due to human irresponsibility and ignorance it is now also found in Hungary. Previously, it also appeared in Lake Balaton, but now its presence has also been detected around Baja.
According to Zoltán Koch, president of the Baja Sportfishing Association, fortunately, the presence of red marsh crayfish is not typical in Baja. A few specimens have already been seen on Sugovica, but they can be confused with the goat wheel, which is also an invasive species.
"The red marsh crayfish has a negative effect on the living space of native animals in every way." Due to its soil-shaping activity, the habitat of many animal species decreases and worsens their chances of survival, explained Zoltán Koch.
Edible, but not harmless The red swamp crayfish can grow up to 10-15 centimeters long.
– I would try it, but this species really feels at home in the faster-flowing streams where it comes from. At the same time, there is no doubt that it adapts and can easily spread, added the specialist. According to Pecaverzum, based on the researchers' report, we can expect further spread not only in habitats loaded with thermal water, but also in the Danube's inflows.
Although the red marsh crayfish is a serious ecological threat, according to Zoltán Koch, the busa is an even bigger problem. By banning fishing, no one controls the population of busa, which gathers in flocks of millions in winter.
- The carp spawns have a negative effect on the habitat of the carp and grass carp. They eat the same food, but the busa is much more prolific and has a bigger appetite - pointed out Zoltán Koch.
The situation is not hopeless, but action must be taken. Part of the fight against red marsh crayfish and busa can be the restoration of certain forms of fishing, the extermination of invasive species, and the continuous monitoring of our natural waters.
The cooperation of professionals and the awareness of communities are key to protecting our country's ecosystem from such "ecological bombs." Protecting nature is not only a responsibility, but also a long-term investment that determines the future of our waters and the survival of native species living there.
Cover image: Invasive species threaten the indigenous wildlife
Source: sokszinuvidek.24.hu
