Global Plankton Database: inventory and data for cruise PV12

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size of 125 µm. Additionally, the JUDAY oceanic model JOM with 300 µm mesh size and 80 cm ring diameter was used. 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, 200-300, 300-500 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.中型浮游动物（Mesozooplankton）采用环径36 cm、网目尺寸125 µm的开闭式JUDAY网（open-closing JUDAY net）进行采集。此外，本次研究还使用了网目尺寸300 µm、环径80 cm的JUDAY海洋模式JOM（JUDAY oceanic model JOM）。本次采用的开闭机构为南森机械锁定系统（Nansen mechanical lock system），可使网具在标准水层（0~10 m、10~25 m、25~50 m、50~100 m、100~200 m、200~300 m、300~500 m）中垂直拖曳，并在上层水层处关闭。拖曳水深通过放出的钢缆长度及钢缆倾斜角进行测算。采集得到的10~20 mL样品经3%~4%缓冲甲醛固定保存，带回实验室后完成处理。所有桡足类（copepods）均鉴定至属级水平，其余分类群则鉴定至型、纲、目及科级水平。