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青鱼在我国分布较广,长江、黄河、珠江等五大水系,及支干流中都有,特别是长江流域的支干流湖泊、水库中往往野生着大量的青鱼。青鱼虽多,但却难以钓获,尤其是数十千克的大青鱼就更难,造成这种现象的主要原因有两个。一是水体中的温度不能满足青鱼的需要,二是大青鱼的习性使然。鱼类是变温动物,不同鱼类对温度有着不同的要求。鲫鱼的适宜温度在10℃～20℃的条件下食欲旺盛,而青鱼在16℃～26℃时食欲最旺,而一年中能满足青鱼对温度要求的时段就是春末夏初在清明与立夏的这段
The herring is widely distributed in our country. There are five major river systems in the Yangtze River, the Yellow River and the Pearl River, as well as the main stream, especially the main stream lakes in the Yangtze River basin. Large numbers of herring are often wild in reservoirs. Although many black herds, but it is difficult to catch, especially tens of kilograms of herring more difficult, causing the phenomenon of two main reasons. First, the temperature of the water body can not meet the needs of herring, and second, the habit of large herring. Fish are warm-blooded animals, different fish have different requirements for temperature. Crucian carp suitable temperature at 10 ℃ ~ 20 ℃ under the conditions of strong appetite, and black fish 16 ℃ ~ 26 ℃ when the most appetite, and a year to meet the temperature requirements of herring during the late spring and early summer in the Qingming and the beginning of summer This section