International Journal of Limnology

This study provides information on the structure and composition of the egg bank of a shallow lake and the effect of biotic factors on hatching rates. The results show the dominance of rotifers over cladocerans and copepods and a positive effect of certain biotic factors on hatching.

In this study, the geothermal water (GW) was replaced with 25% (GW25), 50% (GW50), 75% (GW75) and 100% (GW100) of the volume of the Schlösser culture medium (SM). The biomass concentration was determined to the higher in the GW50 (1.324 g/L) than in other groups (GW25, GW75, GW100 and SM). The highest protein content and phycocyanin purity ratio were found in the GW75 medium containing 116.6 times higher phosphate than the SM. The chlorophyll, phycocyanin, protein, dry biomass, mineral and amino acid in groups prepared by mixing Schlösser medium and geothermal water mix (GW25, GW50 and GW75) were better than geothermal water (GW100) and the SM. It is concluded that using partial geothermal water in Spirulina production is efficient considering the parameters, i.e., biomass yield, protein, mineral and chlorophyll contents, and also return of investment.

Thirteen ostracods reported for the first time from Lake Karamurat exhibited clear habitat preferences and seasonal occurrences. CCA results explained about 91% of correlation between species and environmental variables. The Pseudorichness Ratio of the lake was very low (Pr=0.25), indicating dominancy of cosmopolitan species over noncosmopolitans.