A study on the comparison of the productivity of some lakes in the Eastern Black Sea region using by method morphoedaphic index

In the study, the biological productivity regarding fish biomass was studied in 3 lakesin the Eastern Black Sea region of Turkey. The Morpho Edaphic Index has been the mean criterial applied for the lakes, Sera; (landslide set lake), Uzungöl; (alluvial set lake) and Borcka (reservoir) lake.At the study scope, physico-chemical and biological properties of lakes ( temperature, pH, electrical conductivity, oxygen saturation , TDS, suspended solids, secchi disc depth, chlorophyll-a) were determined on an monthly basis throughout the year. By means of fish biomas data were analysed find out a Uzungöl?s MEI; 17,03, Sera Lake?s MEI; 13,57, Borcka Dam Lake?s MEI; 5,57. According to the MEI estimations, the annual fish biomas was found to be 8,5 kg tonnes/ha.Key Words: Sera lake, Uzun lake, Borcka Dam Lake, Morpho-Edaphic index, fish biomass.