The Importance of Non-Native Prey, the Zebra Mussel Dreissena polymorpha, for the Declining Greater Scaup Aythya marila: A Case Study at a Key European Staging and Wintering Site.

In all the models considered at any step, both predictors describing Zebra Mussel occurrence (Dpa and Dpd) were highly significant, implying the strong dependence of Scaup density on the extent of occurrence and density of Zebra Mussels (in the final model Dpa: edf = 2.104, F = 14.532, p < 0.0001, Dpd: edf = 2.546, F = 4.844, p = 0.0048).

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