近年来由于海洋渔业资源的减少，人们开始重视对某些资源的人工增殖和保护。其中一项保护措施就是改进网具结构。1996年我县蛐耙生产增加很快，到目前仍有上升之势，在一定程度上给我县螃蟹资源造成很大损失，蟹类和某些底层鱼类产量比往年直线下降。因为蛐耙生产属于底拖耙拉 In recent years, due to the reduction of marine fishery resources, people began to attach importance to the artificial propagation and protection of certain resources. One of the protective measures is to improve the structure of the net. In 1996, the production of rake in our county increased rapidly. Up to now, there is still an upward trend. To a certain extent, this has caused great losses to the crab resources in our county. The output of crabs and some ground-floor fish plummets than in previous years. Because rake production is the end of drag dragging