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去年冬初至今年早春,即鱼池结冰期间,我们养殖场的一个鱼种池发生了奇怪的现象。当水面刚结成一层1cm厚的薄冰时,鱼种在四周沿岸扎边死亡,13天内死鱼500kg。随后在鱼池的3个边角地方·即西南西北两个进水口处(因漏水有很轻微的水流)和南岸中间处,共约1.5亩的面积,昼夜有鱼缓慢群游(已停止扎边死亡),造成该3个区域整个冬季未结冰。春天化冰后群游停止,恢复正常。在冰刚能承受住人的时候.曾用网捕捞正在群游的鱼500kg,转移到另一面积2亩的鱼种池中,鱼立即恢复正常,从冰眼处游入水底。检查鱼体时未发现异常,说明鱼本身
During the early winter last year in early spring this year, when a fish pond was frozen, a strange phenomenon occurred in a fish pond in our farm. When the water just formed a layer of 1cm thick thin ice, the fish died in the coastal bar edge around the dead fish within 13 days 500kg. Then a total of about 1.5 acres of area around the three corners of the fish pond, that is, two intakes at the northwestern and north-western (due to slight water leakage) and the middle of the South Bank, a group of fish day and night slowly grouping Death), causing the three areas not to freeze throughout the winter. Ice after the spring group stop swimming, returned to normal. When ice can withstand people, it has been used to catch 500 kg of fish that are being swamped by the net and transferred to another species of 2-acre fish pond. The fish immediately returns to normal and swims from the glacier to the bottom of the water. Check the fish did not find abnormalities, indicating the fish itself