一、概况梅州市养殖的大部分草鱼，属珠江水系鱼类。20世纪60年代起，我市各县陆续建起国营鱼苗场（80年代初起还出现一些个体鱼苗场），负责繁育各种鱼苗向社会供应。由于几十年一贯制，没有注意做好亲鱼选育和品种改良，使亲鱼严重老化和退化，甚至近亲繁殖，年长日久，造成 First, an overview Meizhou aquaculture most of the grass carp, is a Pearl River system of fish. Since the 1960s, state-owned fish fry farms have been set up in all counties in the city (some individual fish fry farms appeared in the early 1980s) and were responsible for breeding various fry to supply the society. Due to decades of consistent system, no attention has been paid to broodstock breeding and breed improvement, causing serious aging and degradation of broodstock, and even inbreeding, resulting in long-term growth.