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浩瀚的海洋,蕴藏着大量的渔业资源,吸引着人们发展大批渔船竞相捕捞。但是,某渔场每年、每季或每汛究竟有多少资源量?却随时都有变化。届时估计可能有多少渔获量?安排多少渔船捕捞较为恰当?这些都是渔业指挥部门和生产单位至为关心的问题。为解决这个问题,有必要对渔获量作一番概要的估计,这项工作称作渔获量趋势预报(以下简称趋势预报)。
The vast ocean contains a large number of fishery resources, attracting people to develop a large number of fishing vessels competing for fishing. However, how much resources does a fishery have annually, quarterly or per flood? It is estimated at this time how many catches may be available and how many fishing vessels are properly arranged for fishing. These are issues of utmost concern to the fishing command and production units. In order to solve this problem, it is necessary to make a summary estimation of catches. This work is called catches forecast (hereinafter referred to as trend forecast).