Resumen de Influence of Food (Chlorella vulgaris) Concentration and Temperature on the Population Dynamics of Brachionus calyflorus Pallas' (Rotifera) Isolated from a Subtropical Reservoir in México
S. S. S. Sarma, Raymundo Arévalo Stevenson, S. Nandini
In this study we have analized the population growth of the rotifer Brachionus calyciflorus subjected to different conditions of temperature (25° C and 30°C) and algal concentration (namely, 1.0 X 10^, 2.0 X 10^ and4.0 X 10^cells ml3). We found that peak population densities were reached at around day 6 at 30°C but between day 9 to 13 at 25°C. The lowest r valué recorded in the study was 0.30d+-0.03 at a food concentration of 1X106 cells ml at 25°Cand the highest population growth rate (0.47±0.01) at a food concentration o f4X10(6) cells mil(3) at 25°C. Both temperature and food concentration had a significant impact on the maximum population density reached, as well as the time necessary to reach the average peak abundante or the rate of growth per day (r).
