| structural changes in gills of lost river suckers exposed to elevated ph and ammonia concentrations. | the lost river sucker (deltistes luxatus) is a federally listed, endangered fish that occurs primarily in upper klamath lake-a hypereutrophic lake in southern oregon, usa. a decline of the sucker population in the lake over the past few decades has been partly attributed to adverse water quality conditions, including elevated ph and ammonia concentrations that occur during summer cyanobacterial blooms. we quantitatively analyzed structural changes in gills of larval lost river suckers after they ... | 2003 | 12727299 |