Reef fish abundance, size and biomass from Aldabra Atoll (Seychelles) between 2014 and 2021 collected by the Seychelles Islands Foundation

Data was collected at Aldabra Atoll (Seychelles) by SIF staff and volunteers as part of the SIF Aldabra Reef Monitoring (ARM) programme at 12 monitoring sites between 2014 and 2021. Nine sites are on the seaward reef with permanently marked transects at both 5 m and 15 m water depth; three sites are inside the lagoon with permanently marked transects at 2 m water depth. Fish visual census surveys were conducted along one to three 50 ? 4 m belt transects (i.e., one transect = 200 m2; 10 m gap between replicate transects) marked by surveyors with tape measures. The first transect was always the permanently marked transect; subsequent replicate transects were surveyed along the same compass bearing and following the same depth contour as the permanent transect. All transects of the same depth at each site were surveyed during the same dive. These data also contain occurrence data from BRUV and RUV surveys done in 2020, as well as subsistence fishery data (most recent catch events per species between 2016 and 2020) sent directly from the Seychelles Islands Foundation.

本数据集由塞舌尔群岛基金会（Seychelles Islands Foundation, SIF）的工作人员与志愿者作为阿尔达布拉珊瑚礁监测（Aldabra Reef Monitoring, ARM）项目的一部分，于2014至2021年间在塞舌尔阿尔达布拉环礁（Aldabra Atoll）的12个监测点位采集完成。其中9个点位位于向海礁区，在5米与15米水深处均设有永久标记样带；剩余3个点位位于泻湖内部，仅在2米水深处设有永久标记样带。鱼类视觉普查调查沿1至3条50×4米的带形样带开展（单条样带面积为200平方米，重复样带间距为10米），由调查人员使用卷尺标记样带边界。第一条样带始终为预设的永久标记样带；后续重复样带则沿与永久样带相同的方位角与等深线布设开展调查。每个点位相同水深的所有样带均在同一潜水航次中完成普查。本数据集还包含2020年开展的诱饵式远程水下视频（Baited Remote Underwater Video, BRUV）与无诱饵式远程水下视频（Unbaited Remote Underwater Video, RUV）调查的物种出现数据，以及塞舌尔群岛基金会直接提供的自给渔业数据（2016至2020年间各物种的最新捕捞事件记录）。