TABLE 1.

Cultivation efficiencies and conditions for maximum culturability of planktonic bacteria from Zwischenahner Meera

Date (day.mo.yr)Conditions for maximum culturabilityMaximum culturability (% of total counts)bControl culturability (% of total counts)Level of significance (P)
27.9.1999cAMP, 21% O2, 20°C1.38 (4.98/0.20)0.23 (0.72/0.02)0.01
21.10.1999cAMP, 21% O2, 20°C9.44 (37.8/1.52)1.64 (5.65/0.40)0.01
23.11.1999cAMP, 21% O2, 15°C0.75 (2.72/0.11)1.14 (3.69/0.13)c
14.1.2000AMP, 3% O2, 20°C0.40 (1.19/0.04)0.48 (1.67/0.05)
10.2.2000cAMP, 3% O2, 20°C2.97 (8.76/0.26)2.14 (6.39/0.20)
21.2.2000cAMP, 21% O2, 15°C0.29 (0.84/0.03)0.29 (0.84/0.03)
30.3.2000cAMP, 3% O2, 20°C6.51 (17.0/0.58)1.19 (7.77/0.33)0.10
6.4.2000cAMP, 21% O2, 20°C0.25 (0.75/0.02)0.17 (0.54/0.02)
4.5.2000cAMP, 21% O2, 20°C2.06 (6.22/0.19)1.98 (5.99/0.55)
11.5.2000BHL, 21% O2, 15°C1.89 (6.02/0.20)0.89 (3.45/0.16)
16.6.2000cAMP, 21% O2, 25°C10.4 (38.3/1.56)5.59 (22.2/0.62)
23.6.2000ATP, 21% O2, 20°C1.74 (5.24/0.16)0.34 (1.64/0.09)0.02
27.7.2000AMP, 21% O2, 15°C5.43 (18.6/0.54)5.18 (16.7/0.50)
11.8.2000BHL, 21% O2, 20°C1.84 (5.84/0.20)1.12 (4.05/0.16)
15.8.2000ATP, 21% O2, 20°C3.16 (9.33/0.28)2.83 (8.28/0.25)
24.8.2000cAMP, 21% O2, 15°C0.53 (2.03/0.10)0.10 (0.33/0.03)0.02
22.9.2000cAMP, 21% O2, 15°C0.85 (3.16/0.17)0.58 (2.37/0.08)
19.10.2000AMP, 3% O2, 20°C0.32 (1.49/0.07)0.15 (0.46/0.01)0.20
21.11.2000ATP, 21% O2, 20°C6.69 (25.9/1.23)0.45 (1.79/0.05)0.001
23.11.2000cAMP, 3% O2, 20°C1.51 (4.80/0.16)0.67 (2.61/0.11)0.20
13.12.2000AMP, 21% O2, 25°C1.37 (4.94/0.20)0.83 (3.38/0.12)
16.1.2001cAMP, 21% O2, 15°C1.18 (3.83/0.13)0.24 (0.71/0.02)0.05
21.2.2001cAMP, 3% O2, 20°C3.34 (9.87/0.30)1.58 (5.05/0.17)
20.3.2001ATP, 21% O2, 15°C9.16 (36.0/1.61)3.03 (9.08/0.28)0.20
24.4.2001AMP, 21% O2, 20°C0.89 (2.85/0.10)1.21 (3.65/0.11)
  • a Not listed are MPN series which exhibited a significant increase in culturability compared to the controls but which yielded lower absolute culturability values.

  • b Upper and lower 95% confidence levels given in parentheses; values in boldface indicate cultivation efficiencies of >5%.

  • c —, not significant (P > 0.20).