Global Plankton Database: inventory and data for cruise ML25

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size 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, 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 taxonomic groups - to type, class, order and family levels.

中层浮游动物采用环直径36 cm、网目大小125 μm的开闭式JUDAY网采集。所使用的开闭机制为南森机械锁系统（Nansen mechanical lock system），该系统允许网具在标准深度层（0-10、10-25、25-50、50-100、100-200、200-300、300-500 m）进行垂直拖曳，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评估。10-20 mL样本经3-4%缓冲甲醛（buffered formaldehyde）固定后，返回实验室处理。所有桡足类（copepods）鉴定至属级，其他分类群鉴定至型、纲、目及科级水平。