Authors: Olajuyigbe, A.O & Olaniyan R.F
Department of Biology, Adeyemi College Of Education, Ondo
Experiment was carried out to show the distribution of zooplankton and the effects of heavy metals on zooplankton in Ajilalu River in Ondo Town. The results showed that copepods species are much more than Rotifera and Cladoceran species.20 species of Copepods.15 species of Rotifers and 17 species of Cladocera were recorded in this River, It was noted that the heavy metal discovered in River were higher such as lead (Pb), Zinc (Zn) and iron (Fe) when compared with WHO standard. The results were in agreement with other experiments carried out by previous researchers in the south west part of Nigeria.