Analysis of Fishing fleets distribution of Pacific saury and Japanese common squid using satellite night light visible images

(1) DMSP/OLS图像处理及数据库生成收集了1994 - 1999年日本海域及三陆海域DMSP/OLS图像，建立了渔船船队分布数据库。(2)卫星海温和海洋颜色图像的处理与数据库的生成收集了1994 ~ 1999年日本海域和三陆外海的NOAA/AVHRR、ADEOS/OCTS、Orbview-2/SeaWiFS图像，建立了海温和叶绿素a的数据库。利用TOPEX/ERS-2海面高度异常资料，研究了中尺度涡旋、黑潮暖核环（KWCR）和津加鲁暖流环流（TWCG）的分布。(4)鱿鱼捕捞船队分布的统计分析(5)鱿鱼捕捞船队分布与海温分布的关系分析我们分析了鱿鱼渔场的位置和距离海温锋面的距离。(6)利用数码相机观测函馆山渔船船队分布我们开发了一种从倾斜照片到垂直照片的分析方法，可以在OLS图像的一个像素中计算渔船船队的数量。(7)太平洋蜥蜴的迁徙路线分析1995年和1998年KWCR-93A和TWCG的合并，切断了大潮第一分支作为太平洋蜥蜴迁徙路线之一的入侵。渔场向近海迁移，表明聚并是改变洄游路线的重要现象。

(1) Processing of DMSP/OLS images and data base generationWe gathered DMSP/OLS images covering Japan Sea and off Sanriku from 1994 to 1999 and generated Data base of fishing fleets distribution.(2) Processing of satellite sea surface temperature and ocean color images and data base generationWe gathered NOAA/AVHRR, ADEOS/OCTS, Orbview-2/SeaWiFS images covering Japan Sea and off Sanriku from 1994 to 1999 and generated Data base of SST and chlorophyll a.(3) Investigation of meso-scale eddies using altimeter sea surface height data.We investigated the distribution of meso-scale eddies, Kuroshio warm core rings (KWCR) and Tsugaru warm current gyres (TWCG), using TOPEX/ERS-2 sea surface height anomaly data.(4) Statistical analysis of squid fishing fleets distribution(5) Analysis of the relationship between fishing fleets distribution and SST distributionWe analyzed the position of squid fishing ground and the distanc e from SST fronts.(6) Observation of fishing fleets distribution from Mt. Hakodate using digital cameraWe developed a methodology to analyze from oblique photograph to vertical photograph and could count the number of fishing fleets in a pixel of OLS images.(7) Analysis of migration routes of Pacific sauryThe coalescence of KWCR-93A and TWCG in 1995 and 1998 cut off the intrusion of the first branch of Oyashio as one of the migration routes of Pacific saury. Fishing grounds moved to offshore and it indicated the coalescence was important phenomena changing the migration routes.