Özet:

In this study, zooplankton fauna of Orduzu Lake were investigated. Samplings were taken montly form 4 different stations between April 2011 and May 2012. Temperature, pH and dissolved oxygen of lake water were determined in situ. In the study totally 47 zooplankton species were recorded. 35 rotifera species belonging to 15 families, 9 Cladocera species belonging to 4 families, and 3 Copepode species belonging to 1 families were determined. As the result of Shannon Wiener species richness index analysis, species richness was found the highest in may (H'=2.29) and the least in september (H'=1). Sorenson Similarity Index value was found the highest between stations I and II with 74% and the lowest between stations I and IV with 69%. The dominant zooplankton species, Polyarthra dolichoptera, was reached its maximum relative density with 73.4% in July. Among all zooplankton, Rotifera was represented with 86.5%, followed by Cladocera 10% and Copepoda 3.5%.

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