“…Yellow perch became more abundant during the 1980s and then markedly declined during the 1990s through the early 2000s, variously attributed to fluctuating phosphorous levels, recruitment failures, overexploitation, and influence of exotic species - Lee et al, 1980), our sampling sites (lettered according to Table 1), distribution of yellow perch mtDNA control region haplotypes (numbered per Table 2) among the sites, and hypothesized colonization pathways from glacial refugia (arrows, adapted from Mandrak and Crossman, 1992), (b) sampling sites in Lake Erie, with boundaries of Lake Erie management units (MUs 1-4 per GLFC, 2006). including the white perch and alewife Alosa pseudoharengus (Shroyer and McComish, 2000;Ryan et al, 2003;Lauer et al, 2008). The Lake Michigan yellow perch fishery collapsed in 1990 (Fulford et al, 2006) and has not yet fully recovered (Marsden and Robillard, 2004;GLFC, 2008a).…”