TPWD HARC Texas Coastal Fisheries Sabine Lake Gill Net

The Texas Parks and Wildlife Department (TPWD) utilizes several sampling gears for fisheries-independent monitoring of finfish and shellfish communities. They include bag seines, trawls, gill nets and oyster dredges. TPWD uses multiple gears in a random sampling protocol, and they identify (to the lowest taxonomic unit possible) and count everything that they collect. This dataset contains gill net data collected for the Sabine Lake bay system in Texas from 1986 to 2008. Collected data also included spatial and temporal information describing the sample location and time, collection gear information, hydrological data (e.g. dissolved oxygen, water temperature, and salinity), weather conditions, species caught, and number of each species captured. Houston Advanced Research Center (HARC) calculated the relative abundance data, calculated as the catch of a particular species in a sample divided by the total number of animals captured in that sample. Absence data was recorded for species on the TPWD species sampling lists that were not captured during sampling.得克萨斯州公园与野生动物部（Texas Parks and Wildlife Department, TPWD）在针对鱼类和贝类群落开展渔业独立监测（fisheries-independent monitoring）时，会采用多种采样渔具，具体包括袋围网（bag seines）、拖网（trawls）、刺网（gill nets）与牡蛎拖网（oyster dredges）。该部门在随机采样方案中搭配多种渔具，会对采集到的所有样本尽可能鉴定至最低分类学单元（taxonomic unit）并完成计数。本数据集收录了1986年至2008年间，针对得克萨斯州萨宾湖（Sabine Lake）海湾系统采集的刺网采样数据。所采集的数据涵盖采样位置与时间的时空信息、采样渔具相关信息、水文数据（如溶解氧（dissolved oxygen）、水温（water temperature）与盐度（salinity））、天气状况、捕获物种及各物种的捕获数量。休斯顿高等研究中心（Houston Advanced Research Center, HARC）计算了相对丰度数据（relative abundance data），其计算方式为某一物种在单一样本中的捕获量除以该样本内捕获的总动物数。针对该部门物种采样名录中未在采样期间捕获的物种，会记录其缺失数据。