TABLE 3.

Long-term experiments for examination of predation and growth of the flagellate Ochromonas sp. DS with the filamentous bacteriaa

Bacterial strainLength (μm)Cell vol (μm3)Initial abundance of bacteria (106 cells ml−1)Initial abundance of Ochromonas sp. DS (104 cells ml−1)Final abundance of bacteria in control without grazing (106 cells ml−1)Ingestion rate (bacteria flagel- late−1 h−1)Clearance rate (nl flagellate−1 h−1)Growth rate of Ochromonas sp. strain DS (h−1)
Hylemonella sp. strain WQH14.5 ± 1.30.50 ± 0.1416.5 ± 0.50.12 ± 0.0314.3b22.5 ± 4.61.85 ± 0.470.035 ± 0.006
H. gracilis WQT26.0 ± 2.10.56 ± 0.1919.0 ± 2.10.13 ± 0.0418.4c16.9 ± 0.61.43 ± 0.090.035 ± 0.006
H. gracilis WQM27.5 ± 2.00.68 ± 0.1851.6 ± 4.80.09 ± 0.0168.4d13.5 ± 2.50.69 ± 0.050.033 ± 0.001
H. gracilis WQP19.0 ± 3.00.85 ± 0.2716.2 ± 0.10.18 ± 0.0315.6e13.5 ± 2.61.19 ± 0.230.025 ± 0.005
S. aurantia WQM413.7 ± 3.71.07 ± 0.2813.0 ± 0.80.30 ± 0.0413.0f6.8 ± 1.60.69 ± 0.150.030 ± 0.004
P. putida MM1g1.1 ± 0.30.48 ± 0.0320.4 ± 1.20.12 ± 0.0227.8 ± 7.71.88 ± 0.750.039 ± 0.005
  • a Values are means ± standard deviations except where otherwise noted.

  • b Data on day 15.

  • c Data on day 15.

  • d Data on day 12.

  • e Data on day 13.

  • f Data on day 5.

  • g Two predation experiments for P. putida MM1.