. Abstract Mouth parts deformities in chironomid larvae are considered as indicators of environmental stress in aquaticsystems caused by water and sediment pollution such as heavy metals, pesticides as well as organiccontamination. Fourth instar chironomid larvae were collected from two sites (SI and SII) located in the RiverNile, Sohag Governorate, Egypt. The chironomid community of the two SI and SII ...
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