Physical, chemical and phytoplankton variabilityin fry ponds (Deroua farm, Beni-Mellal, Morocco)
In fry ponds at Deroua farm, the phytoplankton was represented by a temporal succession of taxa groups. This study showed a similar variability of physical and chemical parameters in fishponds. The statistical analysis proved a variability of these parameters depending of human interventions. At the end of fry period, the phosphorus concentration in B3 and B4 ponds allowed a development of Cyanobacteria