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浙江沿海港湾众多,有杭州湾、象山港、三门湾、台州湾、乐清湾等优良港湾,是许多经济鱼虾贝类的产卵和索饵场所,还有世界著名渔场—舟山渔场,是我国重要的渔业基地。近二十年来,由于沿岸工业迅速发展和农田使用大量化肥,海域氮、磷和有机物污染不断加重,渔获量逐渐下降。并曾于1972年夏、秋季间,在东海北部出现除少量夜光虫外主要由三种毛丝藻所形成的赤潮,其发生时间较长,分布范围广,对东海鲐鲹鱼类的生产带来了一定
There are many coastal harbors in Zhejiang, such as Hangzhou Bay, Xiangshan Port, Sanmen Bay, Taizhou Bay and Yueqing Bay. They are the spawning and bait places of many economic fish and shrimp and shellfish, as well as the world famous fishery - Zhoushan Fishing Ground China’s important fishing base. In the recent two decades, due to the rapid development of coastal industries and the large amount of fertilizers used in farmland, the pollution of nitrogen, phosphorus and organic matter in the sea area has been aggravated, and the catch has been gradually declining. And in the summer of 1972, autumn, in the northern part of the East China Sea, except for a small amount of luminous insects, mainly composed of three kinds of filamentous algae formed by the red tide, which occurred a long time, a wide range of distribution of the East China Sea catfish production brought Certainly