2020-08-072020-08-072000In: Fitzsmons, K.; Filho, J.C. (eds), Proceedings of the Fifth International Symposium on Tilapia in Aquaculture. 3-7 September 2000, in Rio de Janeiro, Brazil. pp. 352-358https://hdl.handle.net/20.500.12348/4267Photoperiod, crude protein level and water temperature were studied for their effects on reproductive performance and egg hatchability in Nile tilapia (Oreochromis niloticus).pond cultureConference Paper