Mesozooplankton average mass during Professor Vodyanitskiy cruise PV11, Part II@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.本数据集采用环径36厘米、网目尺寸125微米的开闭式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），可沿标准水层（0-10 m、10-25 m、25-50 m、50-100 m、100-200 m、200-300 m）实现垂直拖曳，并在各水层的上层边界处关闭网口。此外还开展了0-100 m、100-200 m水层的整合拖网采样。拖曳水深通过放出缆绳的长度与缆绳倾斜角度进行测算。采集得到的10-20 mL样品采用3%-4%的缓冲甲醛（buffered formaldehyde）固定，返航实验室后完成样品处理。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。