章节大纲


    • 出現個体数:number of appearance individuals, 水深:water depth, 夜:night, 昼:daytime, 水温:water temperature, 表層クロロフィルa:Surface chlorophyll a, 全発育段階:all developmental stages

      Gaetanus variabilis was distributed at depths of 500-1000 m throughout the year. On the other hand, it was found that there is a seasonality in the number of individuals appearing at all stages of development. The difference in distribution depth between day and night was not clear. In the offshore Kushiro (Oyashio area) where we went for the survey, a clear bloom of phytoplankton occurred in the surface layer from April to June.