一、苗种生产是养殖生产发展的先行官　　20世纪后半叶以来，我国水产养殖业取得了举世瞩目的发展，主要归功于以下三方面的科技成就：　　1.人工繁殖技术的突破和普及　　“四大家鱼”人工繁殖技术的突破，引发了大多数水产养殖动物人工繁殖技术的突破，并迅速普及，奠定了我 First, seed production is the forerunner of aquaculture production Since the second half of the 20th century, aquaculture in China has made remarkable achievements in the development of the world, mainly due to the following three aspects of scientific and technological achievements: 1. Artificial propagation technology breakthrough and universal “four Everybody Fish ”breakthrough in artificial propagation technology has triggered the breakthrough of artificial propagation technology of most aquaculture animals and has rapidly popularized and laid me