Mesozooplankton average mass during Professor Vodyanitskiy cruise PV5, Part II

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）采用开合式JUDAY网采集，该网环直径为36厘米，网目尺寸为125微米。此外，还使用了JUDAY海洋模式JOM网，其网目尺寸为300微米，环直径为80厘米。所采用的开合机制为南森机械锁定系统（Nansen mechanical lock system），该系统可使网具在标准深度层（0-10、10-25、25-50、50-100、100-200、200-300、300-500米）垂直拖曳，并在上层深度处闭合。拖曳深度通过放出的钢缆长度及钢缆倾斜角度进行评估。10-20毫升的样本用3-4%缓冲甲醛固定，返回实验室后进行处理。所有桡足类均鉴定至属级，其他分类群则鉴定至型、纲、目及科级水平。