论文部分内容阅读
美国对水产品需求量正在增加.1989年水产品的上市量增加1.7%。进入80年代后,美国对水产
Demand for aquatic products is on the increase in the United States, and the listing of aquatic products increased by 1.7% in 1989. Into the 80’s, the United States on aquaculture