Mesozooplankton adundance during Akademik Vernadsky cruise AV9, Part II

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size of 0.125 mm. 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）采用配备36厘米环形框架、网孔孔径0.125毫米的开闭式JUDAY网进行采样。该网搭载南森（Nansen）机械锁定系统实现开闭功能，可开展垂直拖网以采集各标准水层（0~10米、10~25米、25~50米、50~100米、100~200米、200~300米、300~500米）的样品，并在各水层的上层边界处闭合网口。拖网深度通过放出的曳纲长度及曳纲倾斜角度进行测算。采集得到的10~20毫升样品经3%~4%缓冲甲醛溶液固定保存，带回实验室后完成后续处理。所有桡足类（Copepoda）均被鉴定至属级水平，其余分类类群则分别鉴定至型、纲、目及科级水平。