Bottom Trawl Catch Alewife Densities and Ages in Lakes Michigan and Huron

This data release provides catch-per-unit-effort (CPUE) data by age-class for alewife (Alosa pseudoharengus) based on bottom trawl surveys from Lake Michigan (1973-2022) or Lake Huron (1976-2004). These data are associated with a study that sought to evaluate whether alewife populations across the Great Lakes are synchronous in their time series.本数据集发布提供了基于密歇根湖（1973-2022年）或休伦湖（1976-2004年）底拖网调查获取的灰西鲱（Alosa pseudoharengus）按年龄组划分的单位捕捞努力量渔获量（catch-per-unit-effort, CPUE）数据。上述数据关联于一项旨在评估五大湖全域灰西鲱种群时间序列是否具有同步性的研究。