Effects of trophic levels (chlorophyll and phosphorous content) in three different water bodies (urban lake, reservoir and aquaculture facility) on gill morphology of Nile tilapia (Oreochromis niloticus) - Borges, J. C. Shimada; Vivai, Alfonso Braga Bartolini Salimbeni; Branco, Paola Cristina; Oliveira, M. Silva; Silva, José Roberto Machado Cunha da (Journal of Applied Ichthyology, 2013)