一、引言在近30年里,美国商业码头总数几乎保持不变,但世界的渔业捕捞量已提高了3倍。国外在美国近海的捕捞量几乎是美国捕捞量的2倍。国内外渔民竞相捕捞,使得近海资源面临差枯竭的危险。目前,国外和美国渔民单捕捞量大约是110亿磅,销售价值 I. INTRODUCTION Over the past 30 years, the total number of commercial terminals in the United States has remained virtually unchanged, but the world’s fishing fleet has tripled. Catches abroad offshore the United States are almost twice as many as those harvested in the United States. The competing fishing of fishermen both at home and abroad makes offshore resources in danger of poor drying up. Currently, single-country catches by foreign and U.S. fisheries amount to about 11 billion pounds of sales value