CATDOLL : CATDOLL: The Yangtze River’s freshwater fish production accounts for 30 percent of the country’s total, right?

1. The Yangtze River’s freshwater fish production accounts for 30 percent of the country’s total, is that right?

Yes, the freshwater fish production of the Yangtze River, including its tributaries and lakes in the basin, accounts for more than 30% of the country's total

2. Is my country's total marine fish production higher or its total freshwater fish production higher?

Of course it is fresh water. If we talk about the total amount, it is sea water. The amount of fishing is too large. And some sea water also includes the output of kelp and other things.

3. Why is the middle and lower reaches of the Yangtze River known as the land of fish and rice?

Because there are abundant water resources there, it is suitable for growing rice. Of course, good water means fish, so it has become a land of fish and rice.

4. How much is the annual output value of raising fish in a 30-mu freshwater reservoir in the mainland?

60000

5. What are the natural resources in the Yangtze River Basin?

Natural resources of the Yangtze River Basin Huangshan (《Rural World》) Huangshan and other places are famous tourist destinations at home and abroad. (Cheng Liansheng) ehangiiang Iiuyu ziran ziyuan Natural resources of the Yangtze River Basin (natu blood ~es ofChan self iangha- sin) The Yangtze River Basin is the catchment area of ​​the Yangtze River, which is more than 6,000 kilometers long, and its many tributaries, with a total area of ​​about 1.507 million square kilometers. Plateaus and mountains account for 65.6%; hills account for 24%; plains and lowlands account for 10.4%. It concentrates 30% of the country's population, 24.5% of cultivated land, and more than 37% of grain production. It has commercial grain and cotton bases such as Chengdu Plain, Jianghan Plain, Dongting Lake Plain, Duyang Lake Plain, Taihu Plain, and megacities such as Shanghai, Nanjing, Wuhan, and Chongqing. It is not only the economic center of the country with developed industry and agriculture, but also a rich area of ​​various resources. Its characteristics are: ① There are many types of minerals and large reserves. The reserves of tungsten, tin, lead, zinc, copper and other minerals account for more than 50% of the country's total reserves, and the reserves of iron, manganese, aluminum, antimony, vanadium, arsenic, mercury, phosphorus and other minerals also account for a large proportion of the country's total reserves. Among them, the antimony, mercury, arsenic, lead and zinc deposits in Hunan, the tungsten, tin and copper in Jiangxi, and the arsenic and iron deposits in Panzhihua, Sichuan are all located at the intersection of geological structural belts and the mineralization concentration areas of the superposition belts of successive mineralization. ② Adequate hydrothermal resources. The eastern part of the basin is located in the middle and northern subtropics, with an average daily temperature of 10℃ and an active accumulated temperature between 45(X) and 6(X fork)℃. Most areas can harvest crops twice a year. The average annual precipitation is 170 mm, and the annual runoff is 1 trillion cubic meters, accounting for 35% of the total runoff in the country. The total groundwater resources are 213 billion cubic meters, accounting for 27.3% of the total national total. The Yangtze River system has more than 38 navigable rivers of various sizes, with a navigable distance of more than 70,000 kilometers, and the total water transport volume accounts for about 78% of the total inland water transport volume in China. The western part of the basin has a huge terrain difference and extremely rich hydropower resources, with a total volume of 268 million kilowatts, accounting for more than 40% of the national total. The installed capacity that can be developed is 1.2 billion kilowatts, accounting for 53.4% ​​of the national hydropower resources that can be developed. ③ Rich biological resources. The forest area in the region is about 10 million square kilometers, and the timber stock volume is 276.21 million cubic meters, accounting for 26% and 30% of the national total, respectively. Among them, Yunnan, Guizhou, Sichuan, Chongqing and one city are the most important timber production bases in southern China, with forest stock volumes accounting for 1.9%, 1.37% and 17.9% of the country, respectively (including Chongqing). There are also virgin forests distributed along the upper reaches. There are about 110 million mu of freshwater surface in the area, of which about 40,000 mu can be used for aquaculture. There are more than 50 kinds of main economic fish, and the output of freshwater fish accounts for more than 10% of the country's total. It is an important freshwater fish production base. In addition, there are a large number of rare animals and plants under national protection in this area, such as Yangtze alligators, white-eared dolphins, golden monkeys, giant pandas, as well as metasequoia, silver fir, and cycads. ④ The tourism resources have high ornamental value. There are 16 national scenic spots concentrated here, accounting for 13.4% of the total number in the country, including the Three Gorges of the Yangtze River (see page 5 of the color picture insert), Zhangjiajie, Lushan,