Fig. 2From: Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemicsPhoca vitulina. Prevalence of levels (no, mild, moderate and severe) of lungworm infection in harbour seals in age classes 0, 1 and 2 from the German Wadden Sea between 1997 and 2000 (n  =  107). For definition of age classes see section M&M. Numbers in columns depict the exact number of seals per age classBack to article page