Fig. 1From: Alien parasitic copepods in mussels and oysters of the Wadden SeaSampling sites of mussels (squares) and oysters (asterisks) around the North Sea island of Sylt. 1 Ellenbogen, 2 List, 3 Kampen, 4 Leghörn, 5 Munkmarsch, 6 Puan Klent. Grey shaded areas indicate the intertidal zoneBack to article page