Xinhua News Agency, Nanchang, April 12 (Reporters Chen Chunyuan and Chen Yushan) "It has been almost ten years, and it has finally appeared! Wang Shengbian, an expert at the Jiangxi Provincial Institute of Water Sciences, excitedly showed reporters a 23-centimeter-long and 47.4-gram heliopital, which was recently discovered during routine monitoring of the waters of Songmen Mountain in Duchang, Poyang Lake.
"At that time, I was very surprised and unsure, so I hurriedly contacted other experts to compare." Wang Shengbian said, "This tailed heel is small, estimated to be about 1 year old, and it can be inferred that the population of helios that has 'disappeared' for many years is recovering." ”
Once one of the most widely distributed fish in the Yangtze River Basin, the population has declined significantly in recent years, from "common" to "rare".
"The last time we monitored it in Poyang Lake was in 2012, and it seems to have disappeared in the past decade." Wang Shengbian recalled. Zhan Shupin, deputy director of the Anti-Fishing Office of the Department of Agriculture and Rural Affairs of Jiangxi Province, who has been dealing with fish in Poyang Lake for 15 years, said that fishing projects, water pollution, and overfishing are the main reasons for the sharp decline in the number of fish species, and illegal fishing methods such as "ecstasy array" have caused long-term harm to the survival of fish in Poyang Lake.
From January 1, 2020, Poyang Lake and Dongting Lake began a ten-year total ban on fishing, with people ashore, boats recovered, and nets destroyed to fully restore the "double kidneys" of the Yangtze River.
"'Ten years off' only one year, the hemorrhoids are back! This is an important evidence of the effectiveness of the ban on fishing. Zhan Shupin said, "Now, researchers are scientifically monitoring fishing nets under the lake, and one net can hit two or three hundred fish, but before that, it could only hit forty or fifty." ”
Zhan Shupin clicked on his mobile phone to a video taken on the Kangshan waters of Poyang Lake on March 13 this year, and the vast surface of the lake was full of long-lost scenes of carp and crucian carp and crucian carp, such as jubilant and spawning.
In June 2020, aquatic researchers in Jiujiang City also found hundreds of knifefish groups in the waters of Huoyan Mountain in Poyang Lake at one time, which is the first large-scale knifefish population in nearly ten years, indicating that the water ecological environment of the lake area is continuously improving and biodiversity continues to recover.
The number of finless porpoises in Poyang Lake is also steadily increasing. "The porpoise is born in the womb, and in the past decade, the number of porpoises in Poyang Lake has stabilized at about 450, and last year it was monitored as many as 457." Don't underestimate the increase in the number of this point, adhere to the ban on fishing for ten years, the number of finless porpoises is expected to increase to 700, Poyang Lake will reproduce the grand scene of blue waves, cranes dancing fish jumping! Zhan Shupin looked forward.
Source: Xinhua News Agency