Lake Wingra: Fish Lengths and Weights 1995 - current

Data are collected annually to enable us to track the fish assemblages of Lake Wingra. Sampling is done at six littoral zone sites per lake with a beach seine, minnow or crayfish traps, and fyke nets, while a boat-mounted electrofishing system samples four littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two nearshore sites per lake. Fish are identified to species. Lengths are measured for all fish caught, while weight and scale are collected from a subset. Derived data includes catch per unit effort and size distribution by species, lake, and year. Sampling Frequency: annually. Number of sites: 1. Note that 2020 data does not exist due to insufficient sampling.

本数据集按年度采集数据，用于追踪温格拉湖（Lake Wingra）的鱼类群落组成。针对每个湖泊，研究人员在6个沿岸带站点开展采样：使用岸曳网（beach seine）、小型鱼类诱捕笼（minnow traps）、螯虾诱捕笼（crayfish traps）及法伊克网（fyke nets）；同时采用船载电渔系统（boat-mounted electrofishing system）对4条沿岸样带进行采样。研究人员使用垂直悬挂刺网（vertically hung gill nets），从每个湖泊的最深点位采集2个远洋层样本。此外，在每个湖泊的2个近岸站点，使用三层刺网（trammel net）采集跨越温跃层（thermocline）的样本。所有捕获的鱼类均被鉴定至物种水平。对所有捕获个体测量体长，同时从部分样本中采集体重数据与鳞片样品。衍生数据集包含单位捕捞努力量渔获量（catch per unit effort）以及按物种、湖泊和年份划分的体长分布数据。采样频率：每年一次。站点数量：1个。需注意，因采样不充分，2020年无有效采集数据。