Global Plankton Database: inventory and data for cruise AK7_3@en

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size of 0.145 mm. The open-closing mechanism used was the Nansen mechanical lock system allowing nets to be vertically towed through standard depths (0-10, 10-25, 25-50, 50-100, 100-200, 200-500 m) and closed at the upper depth level. Depth of tow was evaluated by wire paid out and the angle of wire inclination. The 10-20 ml samples were preserved in 3-4% buffered formaldehyde and processed on return to the laboratory. All of copepods were identified to genus level, other taxanomic groups - to type, class, order and family levels.本研究采用网圈直径36 cm、网目尺寸0.145 mm的开合式JUDAY网采集中型浮游动物（Mesozooplankton）。该网具搭载南森（Nansen）机械锁系统作为开合控制机构，可沿垂直方向在预设深度层（0~10 m、10~25 m、25~50 m、50~100 m、100~200 m、200~500 m）间拖曳，并于各深度层的上层边界处完成闭合。拖曳深度通过放出的缆绳长度及缆绳倾斜角度进行测算。采集得到的10~20 mL样品经3%~4%缓冲甲醛溶液固定后，带回实验室开展后续处理。所有桡足类动物均鉴定至属级水平，其余分类类群则分别鉴定至型、纲、目及科级水平。