Fig. 7From: Ecological consequences of biological invasions: three invertebrate case studies in the north-eastern Baltic SeaContribution (wet weight %, mean ± SE) of Cercopagis pengoi in the diet of herring Clupea harengus membras, smelt Osmerus eperlanus, three-spined stickleback Gasterosteus aculeatus, nine-spined stickleback Pungitius pungitius and bleak Alburnus alburnus in the Gulf of Riga during the main feeding period in the main feeding grounds in 1994–1998Back to article page