Table 1:
Comparison of day 3 of exposure with recovery for each group in the second experiment (ES2)
| Control |
Synechococcus sp. CC9902 |
Synechococcus sp. CC9311 |
||||
|---|---|---|---|---|---|---|
| Day 3 of exposure (n = 8) | Recovery (n = 7) | Day 3 of exposure (n = 9) | Recovery (n = 9) | Day 3 of exposure (n = 10) | Recovery (n = 9) | |
| Time spent in dark zone (s) | 365 ± 70 | 373 ± 38 | 344 ± 48 | 292 ± 64 | 448 ± 60 | 331 ± 54* |
| Mean velocity (cm s−1) | 6.5 ± 1.6 | 7.9 ± 1.1 | 4.4 ± 0.7 | 5.9 ± 0.9 | 4.1 ± 0.7 | 6.5 ± 0.7* |
| Meandering (° cm−1) | 1381 ± 261 | 1363 ± 391 | 1473 ± 229 | 1450 ± 312 | 2110 ± 351 | 1169 ± 211* |
| Time spent immobile (s) | 293 ± 51 | 216 ± 46 | 361 ± 28 | 237 ± 51 | 374 ± 40 | 209 ± 48* |
| Time spent in middle zone (s) | 111 ± 24 | 97 ± 23 | 215 ± 43 | 155 ± 49 | 135 ± 42 | 144 ± 35 |
| Number of zone transitions | 20.3 ± 7.7 | 23.1 ± 4.9 | 14.0 ± 3.7 | 19.3 ± 4.3 | 7.2 ± 2.8 | 22.2 ± 3.5** |
*Time spent in the dark zone: statistically significant difference from 300 s, P < 0.05. All other parameters: statistically significant differences among treatments (Student's unpaired t tests or Mann–Whitney U tests, P < 0.05). **P < 0.01.