造成渔业资源严重衰退的原因主要有两方面:一是捕捞过度;二是海洋污染和生态环境遭受破坏,鱼类生产不良。 就捕捞而言,广东省的捕捞强度已超出海区资源的承受能力,据估算南海北部渔业资源潜在可捕量为180～190万吨,而1997年南海区渔获量达310万 The main reasons for the serious decline of fishery resources are twofold: first, excessive fishing; second, marine pollution and ecological environment are destroyed and fish production is poor. In terms of fishing, the fishing intensity in Guangdong Province has exceeded the capacity of marine resources. The potential catch of fishery resources in the northern part of the South China Sea is estimated to be 180-1.9 million tons, compared with 3.1 million in the South China Sea in 1997