Mesozooplankton adundance during Professor Vodyanitskiy cruise PV13, Part III

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.

本数据集采用网口直径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）。所采用的开闭机构为南森机械锁定系统（Nansen mechanical lock system），可使网具在预设标准水层（0~10 m、10~25 m、25~50 m、50~100 m、100~200 m、200~300 m）中垂直拖曳，并在上层水层处闭合。此外还采集了0~100 m、100~200 m两层的整段拖网样品。拖曳水深通过放出缆绳的长度及缆绳倾角进行测算。采集得到的10~20 mL样品采用3%~4%的缓冲甲醛溶液固定，带回实验室后开展后续处理。所有桡足类（copepods）均鉴定至属级水平，其余分类类群则鉴定至型、纲、目及科级水平。