Effects of different manure levels on fish growth, mortality and yield in a horizontally-integrated fish-cum-poultry farming system in Nigeria

acuicultura aquaculture aves de corral costos costs crecimiento croissance economia economics economie engrais organique faeces farming systems feces fish culture fish farming fish ponds fishes growth heces mortalidad mortalite mortality nigeria organic fertilizers peces piscicultura pisciculture poisson (animal) poultry production rendement rendimiento volaille yields