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进入八十年代,海洋和淡水天然水域的渔获量已远远不能满足人类对水产品的更高的需求,从而刺激了养殖业迅速的发展。1988年世界水产品养殖产量达1500万吨,每年递增率高达6％。因此养殖业对苗种的需求甚殷。其中尤以鳗苗最为紧缺。沿海捕获的日本鳗苗使日本、朝鲜、中国大陆及台湾省创造了巨额财富。仅台湾省1989年出口的养殖鳗创汇就有4亿美元。国内几十个人工养殖品种,没有任何一种水产品能和养殖鳗的经济效益相提并论。但是,急剧扩大的养鳗业需要的苗种只限于资源极其脆弱的天然捕获的鳗苗。这从根本上限制了其养殖业发展,产
In the 1980s, the catch of marine and freshwater natural waters has far failed to meet humanity’s higher demand for aquatic products, thus stimulating the rapid development of aquaculture. In 1988, the world aquaculture production reached 15 million tons, increasing by as much as 6% annually. As a result, there is a huge demand for seedlings in the aquaculture industry. In particular, the most eel shortage. Japanese eel caught along the coast has made huge fortunes in Japan, North Korea, mainland China and Taiwan. Only Taiwan Province exported 1989 farmed eels earned 400 million U.S. dollars. Dozens of domestic aquaculture species, there is no aquatic products can be compared with the economic benefits of cultured eels. However, the rapidly expanding eel industry requires only limited quantities of naturally caught eel fry with extremely limited resources. This fundamentally limits the development of aquaculture production