西北太平洋柔鱼渔情速报系统的开发

Development of the fishing condition analysis and forecasting system of Ommastrephes bartrami in the northwest Pacific Ocean

柔鱼(Ommastrephes bartrami)作为大洋暖水性种类,分布在北太平洋的广大海域,资源丰富.我国从1993年开始开发利用这一资源,作业渔场范围不断向东伸展,1999年达到西经175°W左右水域.1998-2000年我国每年有350-500艘鱿鱼钓船投入生产,总渔获量在10×104t以上,取得了显著的经济与社会效益[1].

The neon flying squid, Ommastrephes bartrami, is one of the most important jig fisheries in the northwest Pacific Ocean. In order to understand the movement of O. bartrami fishing-ground better and supply O. bartrami fishing-ground information for Chinese fishing boats in the northwest Pacific ocean, the fishing condition analysis and forecasting system of O. bartrami was developed successfully. The system was based on established comprehensive database, which included the catch data of O. bartrami (total yields, count of total fishing boats, fishing position etc. ) and oceanic environmental information (SST, SST gradient etc. ) . Artificial intelligent technology about case-based reasoning was also combined with GIS component technology successfully in the system. The process and function of system establishment are composed of four parts: setting up of case database for central fishing-ground and its environmental factors, knowledge reasoning of fishery information, GIS visualization analyzing as well as trend forecasting of central fishing-ground and information production mapping. At last as an example of the results, an experimental centra] fishing-ground forecasting of O. bartrami from 9 to 15 in July 2002 in the northwest Pacific Ocean was given in the paper. The results showed that through three class similar searching forecasting central fishing-ground would move west, and indicatmg that forecasting of the system for O. bartrami central fishing-ground was correct by comparing to real fishing-ground from 16 to 22 in July 2002. Consequently, artificial intelligent expert system technology about case-based reasoning is a useful method for fishing condition and fishing-ground forecasting.