Fish Egg Retention on Egg Mats in Experimental Flumes and Targeted Field Gear Egg Collection in the Detroit River, 2015-2016

Egg mat retention trials were conducted with walleye (Stizostedion vitreum) and lake whitefish (Coregonus clupeaformis) eggs in an experimental flume tank, seeded directly on egg mats (test retention efficiency) and hand dispersed in flowing flume water to simulate spawning over egg mats (test capture efficiency) with and without alternate substrate. In the field study, we measured number of eggs collected on mats and with bottom drift nets in the Detroit River to compare capture effectiveness. The field collection data describe the number, date of collection, and exact collection location of target species (walleye and lake whitefish). The flume trial data include number of eggs retained or collected, water velocity, and substrate during the flume trials.

本研究以大眼梭鲈（walleye, *Stizostedion vitreum*）与湖白鲑（lake whitefish, *Coregonus clupeaformis*）的鱼卵为试验材料，在实验明槽水槽（experimental flume tank）中开展卵垫滞留效率试验：将鱼卵直接投放于卵垫（egg mat）上以测试其滞留效率；同时通过手动将鱼卵散布于流动的明槽水体中，模拟在卵垫上的自然产卵行为，分别在设置替代底质与未设置替代底质的条件下测试捕获效率。野外研究阶段，我们在底特律河（Detroit River）中利用卵垫与底部漂流网（bottom drift net）采集鱼卵，通过对比两种采集方式的获卵量以评估捕获效果。野外采集数据集包含目标物种（大眼梭鲈与湖白鲑）的获卵数量、采集日期及精确采集点位信息；明槽试验数据集则涵盖试验期间的滞留/采集卵数量、水流流速以及底质类型等相关参数。