章节大纲

    • After the fixed samples are weighed, they are placed on a stone table (Figs. 1 and 2) or other non-shaking surface for at least 24 hours to allow the phytoplankton to settle (Fig. 3).

      ストーンテーブル

      Fig. 1 Stone table

      ストーンテーブル

      Fig. 2 Stone table

      ストーンテーブル上での静置沈殿

      Fig. 3 Static precipitation on stone table

    • Then, the supernatant phytoplankton-free seawater is removed using a siphon (Fig. 4).

      サイフォン

      Fig. 4 Siphon

    • In the Plankton Laboratory, after concentrating in a 1 L container, it is placed in a 110 mL bottle, and precipitation again. After that, the supernatant is removed using a siphon. Samples are concentrated until the final concentration is in a 20 mL bottle (Fig. 5).

      The weight of the concentrated sample is also measured.

      The value that subtracted respectively the weight of the bottle used in the first field and the weight of the bottle used at final is used to determine how many times the sample was concentrated and the concentration factor of the sample.

      濃縮に用いる瓶

      Fig. 5 Bottles used for concentration