Effect of algal food (Chlorella vulgaris) concentration and inoculation density on the competition among three planktonic Brachionidae (Rotifera : Monogononta)
Por:
Sarma, SSS, Franco-Tellez, JL, Nandini, S
Publicada:
1 ene 2008
Resumen:
Competitive outcomes among three rotifer species (Anuraeopsis fissa, Brachionus havanaensis and B. angularis) were quantified with different inoculation densities of two competing species at a time (0, 25, 50, 75 and 100%) and using different algal (Chlorella vulgaris) densities (0.2 x 10(6), 0.4 x 10(6) and 0.8 x 10(6) cells ml(-1)). In control cultures, when each species was grown alone, the population growth of rotifers increased with increasing food availability in the medium, but in mixed cultures, decreased with increasing proportion of the competing species. At low food level, compared to B. havanaensis, B. angularis had stronger negative impact on A. fissa. However, with increasing algal density, both species of Brachionus had similar but reduced impact on A. fissa. Population growth of B. havanaensis was more adversely affected by A. fissa than B. angularis at low and intermediate concentrations. At high food level, the impact of either A. fissar or B. angularis on the growth
Filiaciones:
Sarma, SSS:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, UMF, Lab Aquat Zool, Tlalnepantla 54090, State Of Mexico, Mexico
Franco-Tellez, JL:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, UMF, Lab Aquat Zool, Tlalnepantla 54090, State Of Mexico, Mexico
Nandini, S:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, UIICSE, Tlalnepantla 54090, State Of Mexico, Mexico
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