Influence of pH, Temperature and Sodium Chloride Concentration on Growth Rate of Saprolegnia sp.

Water mold samples, 8 isolations, were obtained to study. There were 4, 2 and 2 isolations from Norway, Scotland and Chile respectively. All 8 isolations contained asexual reproductive structures observed under inverted light microscopy and identified as Saprolegnia sp. The optimum pH, temperature, and % (w/v) NaCl concentrations were 7-10, 25°C and 0-0.5 respectively. These results are useful for predicting occurrence, epidemiological surveys, and distribution of water molds and aquatic animal health monitoring.