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| Format: | Artículo científico |
| Language: | es |
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Universidad de Costa Rica
2008
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44918834015 |
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Table of Contents:
- Tasa de crecimiento poblacional del rotífero Brachionus rotundiformis (Rotifera: Brachionidae) en un quimiostato de dos cámaras María I. Cabrera F. Biología chemostat Brachionus steady state transient state Hopfs bifurcation Population growth rate of the rotifer Brachionus rotundiformis (Rotifera: Brachionidae) in two-stage chemostat. The population growth rates of Brachionus rotundiformis were estimated in two-stage chemostat cultures. Chlorella sorokiniana was supplied continuously from a steady state culture growing with constant illumination on limiting nitrate. Rotifer growth in the second stage was limited by the rate of algal supply. The algal supply rate and rotifer population growth rate were determined by the second-stage dilution rate. The maximum population growth rate in the transient state of B. rotundiformis (1.96 day-1) was observed at 2.5 x 106 cel/ml of the algae whereas in the steady state the maximum population growth rate (1.09 day-1) was similar to the point Hopfs bifurcation predicted by Fussmann and was observed at 1 x 106 cel/ml of the algae. In the transient state, the rotifers growth rate increased and the duplication time decreased at higher algal concentrations, until reaching a peak where the population growth rate begins to decrease. In the steady state, the opposite was true. The growth rates observed in this work are among the highest recorded for this rotifer in continuous cultures. Rev. Biol. Trop. 56 (3): 1149-1157. Epub 2008 September 30. 2008 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44918834015 es http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.56