Influence of Food (Chlorella vulgaris) Concentration and Temperature on the Population Dynamics of Brachionus calyflorus Pallas' (Rotifera) Isolated from a Subtropical Reservoir in México
- Autores: S. S. S. Sarma, Raymundo Arévalo Stevenson, S. Nandini
- Localización: CIENCIA ergo-sum, ISSN 1405-0269, Vol. 5, Nº. 1, 1998, págs. 77-81
- Idioma: inglés
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Resumen
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).
