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自上世纪70年代以来,近海渔业资源遭受到水域污染及过度捕捞的双重破坏,其衰退程度不断加剧,捕捞对象的优质种类比重降低,水生生物种间平衡被打破,种群替代加速,平均营养级下降,渔获物低龄化、小型化、低值化现象日趋严重,渔获物中低值种类比例已上升至70%,许多传统鱼虾已形不成渔汛。渔业资源的衰退,使渔业的可持续发展受到了严重影响。为修复渔业
Since the 1970s, coastal fishery resources have been subjected to double destruction of water pollution and overfishing. Their declining degree has been aggravated. The proportion of high-quality fishing species has been reduced, the balance between aquatic species has been broken, the population replacement has accelerated, and the average trophic level As a result, the phenomenon of low-catch, miniaturization and low-value catches become more and more serious. The proportion of low-value species in catches has risen to 70%, and many traditional fish and shrimp have failed to catch the flood season. The decline of fishery resources has seriously affected the sustainable development of fisheries. To repair fisheries