Bai Yangdian's "nostalgia" fish introduced by the Minister of Ecology and Environment, there are many in the East Lake

The Yangtze River Daily Da Wuhan Client September 15th (Reporter Jin Wenbing) On September 15th, at the "China Ten Years" series of theme press conference held by the Central Propaganda Department, Huang Runqiu, Minister of Ecology and Environment, introduced that the largest North China Plain was the largest Tamsui Lake Baiyangdian has achieved a leap breakthrough from inferior categories to III. Some indigenous "nostalgia" fish such as catfish that have not been seen in Baiyangdian for many years have gradually recovered.

The picture comes from the "China Freshwater Fish Primary Color Atlas" of the Chinese Academy of Sciences.

So, is there such a fish in the waters of Wuhan and what is their living conditions?

"This kind of fish is very common in Wuhan, and most of the old Wuhan people have seen it. Now, some of the gentle waters near Donghu Mountain have such fish inhabiting." Liu Huanzhang, a researcher at the Institute of Aquatic Biological Research of the Chinese Academy of Sciences, studied cowona for 20 years. On the 15th, Researcher Liu Huanzhang told the Yangtze River Daily that catfish had a special way of breeding. They needed to "cooperate" with river mussels to give birth to future generations.

In the breeding season, the male fish produces a gorgeous marriage color and "occupies" one or more river mussels in its own site. Females develop a very rare spawning tube in freshwater fish, and make this "hose" with a length of 1 to 1.5 times long, insert the pores of the river mussels, and produce eggs in the gill cavity of the river mussels. The male fish immediately arranges the sperm in the water -entered pores of the river mussel, and the sperm relies on the water to enter the river mussel gill cavity to combine with the egg. The embryo is "bred" in the gill cavity of the river and the gill cavity of about 1 month, and develops into a fish that can swim independently.

This strange symbiotic method can protect the eggs and juveniles of catfish. However, if the water body is disturbed or polluted, and the river mussels that are more sensitive to the water quality are difficult to survive, then it will cause catfish.

Therefore, on the other hand, if the water quality is clear and more water plants, catfish is more likely to hide and forage, and more easily breed. This means that the local water environment is healthier.

Wu Jinming, deputy researcher at the Yangtze River Institute of Aquatic Research Institute, found that in the Yangtze River Basin, it was found that in the waters with clean water quality, catfish distributed. Therefore, someone uses catfish as a good water quality.

Wu Jinming suggested that the protection of the main river mussels of the catfish will usher in more catfish.

【Edit: Ding】

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