九十年代初，我省开 始了在大型湖泊、水库进 行分割围栏、鱼蟹混养的 高潮，开始两年取得了较 大的经济效益，随后，随着 围拦的不断扩大，湖区、库 区生态环境遭到了改变， 鱼类的禁渔区、保护区遭 到了严重破坏，开发效益 急剧下降，９５％以上的开 发养殖户亏损，导致最后 In the early nineties, the province started the climax of dividing fences and fish and crabs in large lakes and reservoirs, and achieved great economic benefits in the first two years. Subsequently, with the continuous expansion of the enclosure, the lake area and the reservoir area The ecological environment has been changed. Fish-forbidden fishing areas and protected areas have been severely damaged, and the development benefit has dropped sharply. Over 95% of the developed farmers have lost money, resulting in the last