Abstract Perch (Perca fluviatilis) is an important prey species of the great cormorant (Phalacrocorax carbo sinensis) in coastal waters northern Baltic Sea. The annual predation mortality caused by cormorants was estimated based on consumed numbers perch relation to abundance vulnerable age groups sea. We used existing stock assessment data (Archipelago Sea) or a simple population model other a...

In the Laurentian Great Lakes region, the double-crested cormorant (Phalacrocorax auritus) has seen a thousand-fold population increase in recent decades. These large colonies of birds now often conflict with socioeconomic interests, particularly due to perceived competition with fisheries and the destruction of terrestrial vegetation in nesting habitats. Here we use dated sediment cores from p...