Monitoring on Marine Living Resources and their environment

在短寿命的鱿鱼，招聘成功最有可能取决于物理和生物环境的产卵和育苗场。自1980年代后期以来，日本和韩国沃茨的日本普通鱿鱼（太平洋柔鱼）的年捕获量显著增加，最近的捕获量与1960年代相当。以前的研究表明，冬季产卵区的T。在1988年之前的冷制度期间，当成年种群减少时，中国东海的太平洋鲑鱼减少了，而在1989年之后的暖制度期间，当成年种群增加时，其秋冬产卵区在日本和东海延伸并重叠。为了定量地比较各网的采样效率，对四种不同的浮游生物网进行了相互校准。报道了日本海各沃茨浮游动物、桡足类和毛颚类的水平分布、垂直分布和季节变化。秀丽箭虫的摄食活动在夜间较高，全年摄食的食物生物相似。津轻T站浮游植物春季开花后，5月浮游动物生物量较高，1 ~ 7月没有对马暖流的影响。利用CTD、ADCP、遥感和漂流浮标观测资料，分析了东海鱼卵和仔稚鱼的输运机制。

In short-lived squieds, recruitement success most likely depends on the physical and biological environments at the spawning and nursery grounds. Annual catches of Japanese common squid, Todarodes pacificus, in Japanese and Korean waters have markedly increased since the late 1980s, and recent catches have equaled those of 1960s. A previous study suggested that the winter spawning area of T. pacificus in the East China Sea shrank when adult stocks decreased during a cool regime that occurred before 1988, and that its fall winter spawning areas extended and overlapped in the Japan and East Sea when adult stocks increased during a warm regime that occurred after 1989. Inter-calibration of four different plankton nets was carried out in order to compare the sampling efficiency of each net, quantitatively. Horizontal distribution, vertical distribution and seasonal variation of zooplankton, copepods and chaetognaths in the various waters in the Japan Sea, were reported. The Feeding activity of Sagitta elegans was high during night time and they consumed similar food organisms throughout the year. High zoopalnkton biomass was recognized in May after the spring bloom of phytopalnkton at Station T off Tsugaru and there was no influence of the Tsushima warm current in this station from January to July. Transportation mechanism of fish eggs and larval fish was analyzed by using CTD casts, ADCP, remote sensing and drifting buoys observations in the East China Sea.