Open Circuit-Rebreather Comparisons in American Samoa from 2016-04-15 to 2016-05-05 (NCEI Accession 0157573)

Surveys were conducted in the course of a reef fish survey cruise conducted by the NOAA Coral Reef Ecosystem Program (CREP) at the NOAA Pacific Islands Fisheries Science Center (PIFSC). These data come from paired reef fish assessment surveys conducted using close-circuit rebreather (which does not produce bubbles). The survey domain encompassed hard bottom habitats in American Samoa and the stratification included island, reef zone, and depth. Sites were surveyed using the stationary point count (SPC) method to quantify reef fish assemblages. At each survey site, fish biologists entered the water and conducted paired fine-scale (~700 square meters) and high degree of taxonomic resolution Rapid Ecological Assessment (REA) survey to assess species diversity, size distribution, and abundance of fishes at the site. At each site, one survey was conducted on open-circuit SCUBA and one on closed circuit rebreather.本数据集源自美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）太平洋群岛渔业科学中心（Pacific Islands Fisheries Science Center, PIFSC）下属的珊瑚礁生态系统项目（Coral Reef Ecosystem Program, CREP）开展的礁鱼类调查航次期间实施的调研工作。本次采集的数据来自采用闭路循环呼吸器（closed-circuit rebreather，其工作过程不会产生气泡）开展的成对礁鱼类评估调查。 调查区域覆盖美属萨摩亚的硬质底栖生境，分层调查因素涵盖岛屿、礁区与水深。调查站点采用定点计数法（stationary point count, SPC）对礁鱼类群落进行量化分析。在每个调查站点，鱼类生物学家下水开展两组精细化（约700平方米）且分类学分辨率较高的快速生态评估（Rapid Ecological Assessment, REA），以评估该站点鱼类的物种多样性、体长分布与种群丰度。每个站点分别采用开放式水肺潜水（open-circuit SCUBA）与闭路循环呼吸器潜水各完成一次调查。