杭州市辖属一市六县五区,总人口570.98万人(非农业人口108.88万人),自1982年被定为全国重点风景旅游城市后,临时流动人口逐年增多.全市境内水面宽阔,有江、河、湖、库和池塘,总可养殖水面97万亩,但过去水产品供应主要依靠海水鱼,全市淡水鱼年产量一直徘徊在1.5万吨上下,在市场供应中仅 Hangzhou Municipality is a municipality under the jurisdiction of five counties and six counties with a total population of 5,098,800 (non-agricultural population 1,088,800). Since it was designated as a national key scenic tourist city in 1982, the temporary floating population has increased year by year. Rivers, lakes, reservoirs and ponds, breeding a total of 970000 acres of water, but in the past rely mainly on aquatic fish supply of marine products, the city’s annual output of freshwater fish has been hovering at 15,000 tons in the market supply only