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. 2014 Dec 9;9(12):e114926. doi: 10.1371/journal.pone.0114926

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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Infestation parameters (averaged across sampled locations, mean ± standard error of the mean) include the proportion of unionids with past infestation (regardless of Dreissena presence), proportion of infested unionids, Dreissena spp. per host unionid wet weight ratio, and the proportion of uninfested unionids of those with past infestation in studied waterbodies (lakes Erie, Ontario, St. Clair, inland Michigan lakes (Paradise, Douglas and Burt), and the Detroit River) in 2011–2012. Lakes Erie and Ontario were predominantly occupied by quagga mussels (Dreissena rostriformis bugensis, purple bars) and all other waterbodies – by zebra mussels (Dreissena polymorpha, magenta bars). Infestation parameters of unionids collected from zebra- and quagga mussel-dominated lakes were significantly different (****P<0.0001; **P<0.01; *P<0.05, t-test).