Global Plankton Database: inventory and data for cruise ML30

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.

本研究采用环径36厘米、网目尺寸125微米的开闭式JUDAY网（JUDAY net）采集中型浮游动物（Mesozooplankton）样本；同时使用网目尺寸300微米、环径80厘米的JUDAY海洋模式JOM（JOM）开展相关作业。该网具采用南森机械锁定系统（Nansen mechanical lock system）作为开闭机制，可使其在0-10米、10-25米、25-50米、50-100米、100-200米、200-300米、300-500米的标准水层间垂直拖曳，并在各水层的上层边界处关闭。拖曳水深通过放出的拖缆长度及缆绳倾角进行评估。所获10~20毫升样本经3%~4%缓冲甲醛溶液固定后，于返回实验室后开展后续处理。所有桡足类动物均被鉴定至属级阶元，其余分类群则分别鉴定至型、纲、目及科级阶元。