Global Plankton Database: inventory and data for cruise ML24

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.

本次采样使用环径36 cm、网目尺寸0.125 mm的开闭式JUDAY网（JUDAY net）采集中型浮游动物（Mesozooplankton）。其所采用的开闭式机构为南森机械锁系统（Nansen mechanical lock system），可使网具沿垂直方向在预设水层（0~10 m、10~25 m、25~50 m、50~100 m、100~200 m、200~300 m、300~500 m）拖曳，并在上层水层边界处完成闭合。拖曳水深通过放出的缆绳长度与缆绳倾斜角进行测算。采集得到的10~20 mL样品采用3%~4%的缓冲甲醛溶液固定，并在返回实验室后开展室内样品处理工作。所有桡足类（Copepods）均被鉴定至属级阶元，其余分类学类群则分别鉴定至型、纲、目及科级阶元。