TABLE 4.

Survival of the ultramicrobacterial strain CP-1 in the presence of the bacterivorous flagellate Spumella sp.a

DayStrain CP-1Spumella sp., max growth rate (day−1)
Heat immobilizationCell vol (μm3)Mean speed (μm s−1)Survival efficiency (%)Cell no. (106 ml−1)
10.10 ± 0.0158.8 ± 7.296.7 ± 2.919.4 ± 2.7
+0.09 ± 0.015.0 ± 4.357.1 ± 4.817.0 ± 0.2
70.08 ± 0.0260.1 ± 5.3NDb16.3 ± 1.40.05 ± 0.01
+NDNDND1.5 ± 0.90.22 ± 0.03
  • a Bacterial survival efficiencies were evaluated by video microscopy instantly after the addition of the flagellate on day 1. All values are given as means ± standard deviations.

  • b ND, not determined.