Mohammad Mujallid,2022-05-262022-05-2614261https://drepo.sdl.edu.sa/handle/20.500.14154/30823Structural, Ultrastructural and Morphometric changes in the gills of brown trout, salmo trutta, Seasonally Acclimated to 5* & 15*c, following exposure to copper in soft acidic water. (Ph.D.)Thesis