Sampling sites in the North Sea canal between the sea sluices in IJmuiden and the IJmeer, indicated by arrows with km. The square in the inserted figure indicates the geographical location of the North Sea canal area and the black arrow points the location of the canal through Voorne in the Netherlands.

 
 
  Part of: van der Gaag M, van der Velde G, Leuven RSEW (2024) Matching field-based ranges in brackish water gradients with experimentally derived salinity tolerances of Conrad’s false mussel (Mytilopsis leucophaeata cochleata) and zebra mussel (Dreissena polymorpha). Aquatic Invasions 19(2): 169-190. https://doi.org/10.3391/ai.2024.19.2.124566