SPECIES DIVERSITY AND SEASONAL ABUNDANCE OF CERTAIN AQUATIC ARTHROPODS SURVEYED FROM SOME PONDS LOCATED AT THE EL-GHORIEB AREA ASSIUT, EGYPT

The current study focused on certain aquatic arthropods extracted from some ponds located at El-Ghorieb area during two years starting from March, 2011. In the present study, twenty species of aquatic arthropods pertaining to six orders (i.e., Diptera, Hemiptera, Coleoptera, Odonata, Cladocera and Acari) were recorded from some water pools. All the aquatic species increase to enumerate through the spring season and the least numbers were recorded during winter. Autumn and summer were inbetween. The occurrence percentage of each species inside its own order was also calculated.The study showed that the highest proportion of mosquito species with an average ratio of 62.29 and the least was with Odonata with an average of 3.6.