Global Plankton Database: inventory and data for cruise AK7_3

Mesozooplankton was sampled by open-closing JUDAY net with a 36 cm ring diameter and mesh size of 0.145 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, 200-500 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.

本研究采用网圈直径36 cm、网目尺寸0.145 mm的开闭式JUDAY网采集中型浮游动物（Mesozooplankton）样本。该网具搭载南森机械锁定系统（Nansen mechanical lock system）作为开闭机构，可在预设标准水层（0-10 m、10-25 m、25-50 m、50-100 m、100-200 m、200-500 m）中完成垂直拖曳，并于各水层的上层边界处封闭网口。拖曳深度通过放出的曳纲长度及曳纲倾角进行测算。所获10~20 mL样本经3%~4%缓冲甲醛溶液固定后，返回实验室开展样品处理。所有桡足类（Copepods）均鉴定至属级分类水平，其余分类类群则分别鉴定至型、纲、目及科级水平。