Abstract
Lake whitefish (Coregonus clupeaformis) have been widely studied across the Laurentian Great Lakes. However, there are major gaps in our understanding of factors that affect larval distribution and abundance. The goal of this study was to investigate the distribution and abundance of larval lake whitefish in a Great Lakes embayment using Stokes Bay, Lake Huron as a case study. We collected plankton samples and environmental data from mid-spring to early summer during 2011 and 2012. Ichthyoplankton tows in 2011 revealed densities that are among the highest to be reported in Great Lakes studies. Overall there was little relationship between environmental variables (temperature, dissolved oxygen, conductivity, and depth) and larval lake whitefish distribution and abundance. Ichthyoplankton tows in 2012 revealed a virtual absence of larval lake whitefish during the entire sampling season; unseasonably warm conditions during spring 2012 likely had an important effect on larval survival.
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