4 ) we put forward and proved that the output structure also is one of the causes resulting in the price fluctuation . then we analyzed the relation between output structure and output growth via moore index . it is proved that the relation is positive association 4 )提出水产品产量结构也是导致水产品价格变动的原因之一，并采用图形化方式和数学方法证明了该假设；采用moore夹角分析了水产品部门结构与水产品产量增长的关系，部门结构变动与水产品产量增长具有正相关关系，但不具有确定性趋势。
