Zooplankton abundance in the Kerguelen Axis region

Zooplankton were collected with a Rectangular Midwater Trawl (RMT 8+1 net) from 37 sampling sites on and near the Southern Kerguelen Plateau. The contents of each net were preserved in 5% buffered formaldehyde. This dataset covers the counts of the contents of the RMT1 net. The contents were split in the laboratory using a Motoda Box and then identified and counted under a Leica M165C stereo-microscope. A flow meter attached to the mouth of the RMT 8 was used to record the volume of seawater passing through the net, and this volume was converted to water passing through the RMT 1 by applying the conversion factor of 2.027357. The organisms in the samples were identified to the lowest taxonomic level possible. For copepods and euphausiids this level was to species, and generally to sex and/or development stage. For other groups, the identifications were to high levels such as Family or Order.

研究团队采用矩形中层拖网（Rectangular Midwater Trawl，RMT 8+1网），在凯尔盖朗高原南部及邻近海域的37个采样站点采集浮游动物（Zooplankton）。每台拖网采集的样本均保存于5%缓冲甲醛溶液中。本数据集涵盖RMT1网采集样本的计数结果。实验室阶段，工作人员采用Motoda分样箱（Motoda Box）对样本进行分样，随后借助徕卡M165C体视显微镜（Leica M165C stereo-microscope）完成物种鉴定与个体计数。通过安装于RMT 8网口的流量计记录流经该网的海水体积，并以换算系数2.027357将该体积转换为对应流经RMT 1网的海水体积。样本中的生物被鉴定至尽可能低的分类阶元：针对桡足类（Copepods）与磷虾类（Euphausiids），鉴定精度可达物种水平，且通常同时记录其性别及/或发育阶段；对于其余类群，鉴定仅能达到科（Family）或目（Order）等较高分类阶元。