TPWD HARC Texas Coastal Fisheries Matagorda Bay 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 Matagorda bay system in Texas from 1976 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）采用多种采样渔具（sampling gears），开展针对鳍鱼（finfish）与贝类（shellfish）群落的渔业独立监测（fisheries-independent monitoring）。其使用的渔具包括袋围网（bag seine）、拖网（trawl）、刺网（gill net）及牡蛎拖网（oyster dredges）。该部门采用多渔具随机采样方案（random sampling protocol），对采集到的所有生物尽可能鉴定至最低分类单元（lowest taxonomic unit）并完成计数。本数据集涵盖1976年至2008年间针对得克萨斯州马塔哥达湾海域采集的刺网采样数据。所收录的数据包含描述采样位置与时间的时空信息（spatial and temporal information）、采样渔具相关信息、水文数据（hydrological data，如溶解氧（dissolved oxygen）、水温和盐度（salinity））、气象条件、捕获物种及各物种的捕获数量。休斯顿高级研究中心（Houston Advanced Research Center, HARC）计算了相对丰度（relative abundance）数据：相对丰度为某一采样中特定物种的捕获量除以该采样内所有捕获动物的总数量。对于TPWD物种采样名录中未在采样过程中捕获的物种，将记录其缺失数据（absence data）。