Recovery of Burrowing Mayflies (Ephemeroptera: Ephemeridae: Hexagenia) in Western Lake Erie

Multispatial-scale variation in benthic and snag-surface macroinvertebrate assemblages in mid-continent US great rivers

“…In the 1950s, much concern arose when mayfly densities crashed in the Upper Mississippi River System and Lake Erie (Fremling 1964;Mills et al 1966;Kreiger et al 1996). The last large emergence of mayflies near Havana, Illinois, was in 1949 (Mills et al 1966).…”

Model Distribution of Silver Chub (Macrhybopsis storeriana) in Western Lake Erie

“…Possible impacts of Zebra Mussels on the Silver Chub are not known, but it is possible that the Silver Chub has benefited from the presence of the Zebra Mussel, as populations of both Silver Chub and its prey, Hexagenia spp., recovered shortly after the invasion of the Zebra Mussel in Lake Erie (Krieger et al 1996). Reasons for the recovery of Hexagenia spp.…”

“…Hexagenia spp. are sensitive to hypoxia (low dissolved oxygen levels; Krieger et al 1996Krieger et al , 2007 and chronic hypoxia, at temperatures of ≤14°C, has been shown to reduce the survival rates of mayfly nymphs (20% survived for 8 days in hypoxic conditions), and this effect is increased at higher water temperatures (Krieger et al 1996). Persistent hot conditions or unusual weather conditions that permit the establishment of a shallow hypolimnion over large areas of the western basin of Lake Erie, could lead to anoxic (lack of dissolved oxygen) conditions at the bottom of the lake (Krieger et al 1996); this would likely have a negative impact on Hexagenia spp.…”

Influences of gillnet fishing on lake sturgeon bycatch in Lake Erie and implications for conservation

“…The corresponding area under the curve (AUC) is indicated in parentheses. party: conditional-inference classification tree generated by the R-package 'party'; tree: exhaustive-search-based tree generated by the R-package 'tree'; rpart: exhaustive-search-based tree generated by the R-package 'rpart' Lake Erie and supports a variety of benthic macroinvertebrates (Krieger et al 1996). Spawning migration of lake sturgeon during the summer and fall complicates their spatial distribution among Lake Huron, the St. Clair system, the Detroit River, and Lake Erie (Thomas & Haas 2002).…”