Global Plankton Database: inventory and data for cruise PV11@en

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh sizes of 125 µm. 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 m) and closed at the upper depth level. Integrated hauls (0-100, 100-200 m) were also taken. 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.本研究采用环径36厘米、网目尺寸125微米（µm）的开闭式JUDAY网（open-closing JUDAY net）采集中型浮游动物（Mesozooplankton）。该网具搭载南森机械锁定系统（Nansen mechanical lock system），可垂直拖曳通过标准水层（0~10米、10~25米、25~50米、50~100米、100~200米、200~300米），并在上层水层处关闭网口。此外还开展了0~100米、100~200米的整层拖网采样。拖曳水深通过放出的钢缆长度及钢缆倾斜角度进行测算。采集得到的10~20毫升样品采用3%~4%的缓冲甲醛溶液固定，返航至实验室后完成样品前处理。所有桡足类（Copepods）均鉴定至属级分类水平，其余分类类群则分别鉴定至型、纲、目及科级分类水平。