Average proportional abundances of Pm I, Pm II and Pm III adults and juveniles on different structures of Fucus spiralis (in order: receptacula, thalli and non-fertile tips; n = 6, except for the first sampling in November, where n = 4) and Fucus vesiculosus (in order: receptacula, thalli and bladders; n = 6) for the two sampling moments (n = 6) in (a) November and (b) April.
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