In Qiandao Lake, Chun'an County, Zhejiang, China, the autumn fishing of the giant net in Qiandao Lake kicked off, and the first net caught 160,000 catties. Qiandao Lake has a bumper harvest every year, where do so many fish come from?Local fishermen tell the truth.
Qiandao Lake: The Ecological Miracle Behind the Waters.
First of all, Qiandao Lake is not a natural lake. In 1959, the Xin'an River Reservoir was completed, and the upper reaches of the Xin'an River were intercepted into a vast lake, which was more than 100 times larger than the West Lake, and was known as "the world's first beautiful water". In comparison, Chagan Lake covers an area of only 307 square kilometers.
Qiandao Lake has excellent water quality and is one of the best water bodies among China's major rivers and lakes, and is known for its high-quality fish.
The crisis of deteriorating water quality.
However, in the late 90s, Qiandao Lake faced a water quality crisis. The problem of soil erosion is prominent, and the lost area accounts for 17 percent of the total land area5%, mainly in open forest land. After the completion of the power station, a large amount of nutrients such as nitrogen and phosphorus entered the lake, resulting in soil eutrophication.
In addition, the influx of fertilizers and pesticides also leads to high concentrations of nitrogen and phosphorus in the water body.
The governance of ecological stocking.
1998 In 1999, the fishery output of Qiandao Lake dropped sharply to 700,000 catties. In order to restore water quality, Qiandao Lake has carried out ecological stocking experiments. Purse seine nets were set up in areas where cyanobacteria had erupted, and large quantities of silver carp and bighead carp were stocked, and fishing was prohibited for three years. The results showed that silver carp and bighead carp significantly reduced the nitrogen and phosphorus content of the lake and restored the water quality.
The success of the ecological fish farming model.
Qiandao Lake then began ecological fish farming, and since 2000, the release has been increased year by year. In the past 20 years, a total of 6666.9 billion fish, forming a release pattern dominated by silver carp, bighead carp, flower fish bone, yellow-tailed cattail, fine-scaled oblique-jawed carp and other species.
Thanks to this, Qiandao Lake has an annual output of 8 million catties of fish, and it is stipulated that the weight of the silver carp caught must be more than 5 catties, and those below the standard must be put back into the water to continue breeding.
Management measures for sustainable development.
The fishery administration of Qiandao Lake has strictly cracked down on illegal fishing methods such as poisonous fish, electric fish, and explosive fish. Since 2010, more than 2,000 acres of breeding cages have been dismantled, and 300 acres of Laokou fish fingerlings and 200 acres of fishery scientific research cages have been retained. Fishermen said there was a strict time limit for fishing, with a ban on fishing from March 1 to 10 a.m. on July.
Characteristics of Qiandao Lake's "water fish farming" model.
Giant net fishing in Qiandao Lake began in the 60s of the last century. According to the complex topography of the reservoir, the joint fishing method of "stopping, catching, stabbing and stretching" was created, and 800,000 catties of fish were caught in one net. In addition, the live fish transport ship designed and built by itself in combination with the terrain has won the national invention patent.
Organic fish farming.
Fishermen in Qiandao Lake said that all the fish they caught met the ecological farming standards. From inducing production, seedling, nursery to stocking, all belong to ecological farming, and organic fish is the product of wild breeding. The Xin'anjiang Fishery Administration Sub-station has been set up in the local area to implement unified management.
The water of Qiandao Lake is not only wild-raised, but also a source of organic food.
The water of Qiandao Lake is not only wild-raised, but also follows the requirements of organic food production, without the use of any chemical fertilizers, pesticides and growth hormones. It is fully cultivated by using the natural bait of Qiandao Lake and has passed the certification of the Organic Food Development Center of the State Environmental Protection Administration, which is the food with the highest safety level.
Conclusion: The miracle of "water fish farming" in Qiandao Lake is a successful example of ecological governance.
The miracle of ecological governance demonstrated by the "water fish farming" model of Qiandao Lake is breathtaking. This successful experience not only brings significant benefits to the development of local fisheries, but also provides a model for other regions to learn from ecological conservation and sustainable fishery development.
First of all, the ecological fish farming model of Qiandao Lake demonstrates the importance of scientific governance. Through ecological stocking experiments, Qiandao Lake has set up purse seine nets in the area of cyanobacteria outbreak, introduced a large number of silver carp and bighead carp, and restricted fishing, and achieved significant water quality improvement results. This scientific and sustainable management method provides strong support for the restoration of the lake ecological environment and has become a governance method that other regions can emulate.
Second, Qiandao Lake's policy of "catching big and keeping small" highlights the concept of sustainable fisheries development. The policy of stipulating that the caught-caught silver carp must weigh more than 5 catties, and all those below the standard must be released into the water for further farming, which helps to protect fishery resources, prevent overfishing, and maintain the sustainability of the fishery. This management method of source control is worthy of Xi and reference by other regions, and provides useful experience for the rational development of fishery resources.
In addition, the Qiandao Lake Fishery Administration's crackdown on illegal operations such as poisoning, electrocution, and exploding fish, as well as the gradual reduction in the number of aquaculture cages, demonstrate strict supervision of fishing practices. This strong management measure provides strong support for the sustainable development of the fishery of Qiandao Lake, ensuring the health and abundance of fishery resources.
The successful experience of Qiandao Lake has not only made remarkable achievements in ecological governance, but also made positive breakthroughs in ecological fish farming models and management policies. This success story provides valuable lessons for other lakes and waters, highlighting the indispensability of science-based governance, sustainable development and strict regulation in maintaining the ecological balance of waters and the sustainable use of fishery resources. It is hoped that the successful experience of Qiandao Lake can be promoted on a wider scale, and contribute more wisdom and strength to the ecological conservation and sustainable development of fisheries in China's waters.
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