Substrate hardness and walleye (Sander vitreus) and lake whitefish (Coregonus clupeaformis) egg presence in Saginaw Bay, Lake Huron, before and after substrate cleaning experiments and walleye hatching success experiments, 2018-2019

These data include a field study of the sediment hardness and fish egg density (walleye [Sander vitreus] and lake whitefish [Coregonus clupeaformis]) after sediment cleaning treatments (propulsion sled or hydro-jet sled) conducted at two reef locations in Saginaw Bay, Lake Huron, during 2018 and 2019. The data includes the year, species, reef, treatment type (jet, fan, control), number of eggs, and egg density in the treatment area. Relative sediment hardness for the treatment areas assessed before and after sediment cleaning experiments is provided. Additionally, walleye eggs were collected from Brookville Reservoir, Indiana, and incubated at the aquaculture research laboratory at Purdue University (West Lafayette, Indiana) to determine the effect of sediment cover on egg hatching success rate. The incubated eggs were exposed to different sediment types and levels of sediment coverage intensity. The data contains the year, treatment, parental female length (2019 only), number of walleye hatched, and egg diameter (2019 only) collected in the laboratory study.本数据集涵盖2018至2019年在休伦湖萨吉诺湾两处礁体开展沉积物清理作业（推进式雪橇或水力喷射雪橇）后，沉积物硬度与两种鱼类（白斑狗鱼[Sander vitreus]、湖白鲑[Coregonus clupeaformis]）鱼卵密度的实地研究数据。数据集包含年份、物种、礁体、处理作业类型（喷射式、扇形、对照组）、鱼卵数量及处理区域内的鱼卵密度，并提供了沉积物清理实验前后对各处理区域评估得到的相对沉积物硬度数据。此外，研究人员从印第安纳州布鲁克维尔水库采集白斑狗鱼鱼卵，并在普渡大学（印第安纳州西拉法叶）水产养殖研究实验室开展孵化实验，以探究沉积物覆盖对鱼卵孵化成功率的影响。实验中将待孵化鱼卵暴露于不同类型沉积物及不同沉积物覆盖强度梯度条件下。本次实验室研究获取的数据包含年份、处理方式、亲本雌鱼体长（仅2019年）、孵化出的白斑狗鱼幼鱼数量以及鱼卵直径（仅2019年）。