Challenges in down stream dam passage and the effect of dam removal on Atlantic salmon (Salmo salar) smolt migrations Samhällsnytta med utrivning av tre vattenkraftsanläggningar i Rönne å A scanning electron microscopy based survey of the impact of infestation by parasitic freshwater mussel glochidia upon the gill morphology of two species of salmonid fish First observation of a spawning mantle display in a European unionid mussel