Oil Industry Fisheries Data. Version 1.0

The primary object of the fish trawl assessment program is to estimate the relative abundance (numbers) and biomass (weight), species composition, and biological information on benthic and pelagic marine fish and invertebrate communities within the study areas. Bottom and pelagic trawl nets are deployed at each station and towed for approximately 5 to 15 minutes at an approximate speed of 2 to 4 knots. On average a 15 minute trawl tow covers a distance of approximately 926 meters (3,050 ft.). State-of-the-art instrumentation records all trawl performance data during each tow, allowing an accurate estimate of area surveyed. Biologists sort the catch, weigh and count animals by species, and collect samples for studies of diet and ecosystem relationships. Common fish species seen in the trawl surveys in the Chukchi Sea are mostly small and include Arctic cod, Pacific sandlance, capelin and several species of sculpins. Common invertebrate species are numerous and include snow crab, a variety of sea stars, brittle stars and molluscs. This dataset is part of the Pacific Marine Arctic Regional Synthesis (PacMARS) Project. This dataset contains the original csv files, metadata files, shapefiles, and geodatabase files in zip files.

本拖网渔业评估项目的核心目标，是估算研究区域内底栖与远洋海洋鱼类及无脊椎动物群落的相对丰度（数量）、生物量（重量）、物种组成及相关生物学信息。各采样站位均布设底拖网与远洋拖网，以2至4节的近似航速拖曳约5至15分钟。平均而言，15分钟的拖网作业覆盖距离约为926米（3050英尺）。当前最先进的仪器设备会记录每次拖网作业的全部性能数据，借此可精准测算调查海域面积。生物学家会对渔获物进行分拣，按物种称重、计数，并采集样本以开展食性与生态系统关系相关研究。楚科奇海拖网调查中常见的鱼类多为小型物种，包括北极鳕、太平洋玉筋鱼、毛鳞鱼以及多种杜父鱼类。常见无脊椎动物物种丰富多样，涵盖雪蟹、各类海星、脆海星以及软体动物。本数据集隶属于太平洋北极区域综合研究（Pacific Marine Arctic Regional Synthesis, PacMARS）项目。本数据集包含压缩包格式的原始csv文件、元数据文件、形状文件（shapefile）与地理数据库（geodatabase）文件。