Fig. 1. In the six-year period from 2007 to 2012, a total of 2055 samples of blue mussels (Mytilus edulis) from 152 locations along the Norwegian were sampled and examined. Red
points marked 1. to 5. represents the stations described in more detail in the text. (For interpretation of the references to colour in this figure legend, the reader is referred to the
web version of this article.)