Nitrogen isotopic compositions of midwater fish, K-Axis voyage of the Aurora Australia, 2016

Midwater fish nitrogen isotope data from the Kerguelen Axis ecosystem study (AAS_4344):These data are based on samples collected as part of the Kerguelen Axis marine ecosystem study (AAS_4344), chief scientist Andrew Constable. This research was supported by the Australian government under the (i) Cooperative Research Centre Program through the Antarctic Climate and Ecosystems Cooperative Research Centre (ACE CRC), (ii) Australian Antarctic Science Program (Projects 4343, 4344, 4347 and 4366), and (iii) Australian Research Council’s Special Research Initiative for Antarctic Gateway Partnership (Project ID SR140300001).The preferred citation is:Walters et al. Food sources and trophic structure of deep sea midwater (fish) food webs in the Southern Ocean as inferred from nitrogen isotopic compositions. Midwater fish samples were collected on board the R.S.V. Aurora Australis during the austral summer of 2016 (22 January-17 February) as part of the Kerguelen Axis marine ecosystem study (AAS_4344). Samples were collected from 9 sampling stations along one transect from the Antarctic continental shelf to the BANZARE Bank over the Kerguelen Plateau. Midwater fish were sampled from the surface to 1000 m depth using an IYGPT (International Young Gadoid Pelagic Trawl) net equipped with a MIDOC (Mid-water Open Close) multiple cod-end device. Analyses focused on mesopelagic and bathypelagic fish taxa. The nitrogen isotopic composition of individual amino acids was measured in muscle tissue from each fish.As of 2022-09-30, these data were still being worked up for publication.

凯尔盖朗轴（Kerguelen Axis）生态系统研究（AAS_4344）中层鱼类氮同位素数据集：本数据集基于该研究（首席科学家Andrew Constable）采集的样本构建。本研究得到澳大利亚政府资助，具体包括：(i) 依托南极气候与生态系统合作研究中心（Antarctic Climate and Ecosystems Cooperative Research Centre, ACE CRC）实施的合作研究中心计划；(ii) 澳大利亚南极科学计划（项目编号：4343、4344、4347及4366）；(iii) 澳大利亚研究委员会南极门户合作专项研究计划（项目编号：SR140300001）。推荐引用格式：Walters等人. 基于氮同位素组成推断南大洋深海中层鱼类食物网的食物来源与营养结构。2016年南大洋夏季（1月22日至2月17日），研究团队搭载"R.S.V. Aurora Australis"号科考船，依托凯尔盖朗轴海洋生态系统研究（AAS_4344）项目采集中层鱼类样本。样本采集自凯尔盖朗高原上从南极大陆架至班扎雷浅滩（BANZARE Bank）的一条断面的9个采样站位。研究使用配备MIDOC（Mid-water Open Close，中层开闭式）多囊网装置的IYGPT（International Young Gadoid Pelagic Trawl，国际稚鳕中层拖网），从表层至1000米水深采集中层鱼类样本。分析聚焦于中层带（mesopelagic）与深层带（bathypelagic）鱼类类群，对每条鱼类肌肉组织中的单体氨基酸氮同位素组成进行了测定。截至2022年9月30日，本数据集仍在整理以待发表。