Towed video (C-BASS) based density estimates for reef fishes between 30-200 m of depth along pipelines, on unconsolidated substrates (mud/sand), and hard bottom structures throughout the Gulf of Mexico 2018-04-27 to 2020-01-16

This dataset includes time/date=stamped, geo-referenced raw counts, and corresponding density estimates, of reef fishes along randomly selected transects throughout the northern Gulf of Mexico within 30 to 200 meters of water. These counts are based on video footage collected using the towed video camera system, C-BASS. The transects mainly focused on pipeline infrastructure but also sampled unconsolidated mineral substrates (sand/mud) and select hardbottom areas. A total of 6 cameras (four forward-facing, two side-facing) were recording but fish data analyses were only performed on the video from the highest-quality, forward-facing camera. CMECS-based habitat analyses were also performed in 15-second intervals for corresponding, detailed bottom characterization to supplement the fish counts/density.本数据集涵盖墨西哥湾北部30至200米水深范围内，沿随机布设的样带采集的礁鱼类（reef fishes）带时间/日期戳记、经地理参考（geo-referenced）的原始计数数据及对应密度估算值。该计数数据基于采用拖曳式摄像系统C-BASS（towed video camera system, C-BASS）采集的视频影像。本次调查样带主要聚焦管道基础设施，同时也对未固结矿物底质（砂/泥）及选定的硬质底质区域开展了采样。本次共部署6台摄像机（4台正向、2台侧向）进行录制，但仅针对画质最优的正向摄像机采集的视频开展鱼类数据分析。此外，研究人员以15秒为间隔开展基于海岸与海洋生态分类标准（Coastal and Marine Ecological Classification Standard，CMECS）的生境分析，对海底进行详细特征描述，以补充鱼类计数与密度数据。