INVENTORY OF ZOOPLANKTON AND MACROINVERTEBRATES IN THE DAYA OF DAR BOUAZZA, CASABLANCA, MOROCCO

Abstract

This study aims to contribute to the elaboration of an inventory of zooplankton and macro invertebrates in the daya of Dar Bouazza, Casablanca region, Morocco. The determination of macro invertebrates and zooplanktons was based on the study of benthic larvae sampled between March and June 2021 in 4 stations. In the 4 stations, the benthic macro invertebrates recorded are distributed over 4 major faunal groups, 27 families and 35 genera. Coleoptera are largely dominant with 7 families. Diptera are second with 5 families. The Hemiptera are in third place. The zooplanktonic fauna of the Daya is divided into 2 groups: Cladocerans which are represented by three genera (Bosmina, Daphnia and Diaphanosoma) and Copepods which are represented only by the genus Cyclops.The physicochemical results showed a strong mineralization in the Daya. This is probably the combined effect of the degradation of the waters of the Daya of Dar Bouazza and the water table of the coastal chaouia, of which Daya is part. These results are confirmed by bacteriological tests through the identification and enumeration of Coliforms and intestinal Streptococci. The presence of these bacteria translates a pollution of fecal origin making these waters unfit for human use.