Behavioral analyses of the different periods of maintenance at 15°C
| Behavioral category | Mean ± s.d. | Nmin | Nmax |
|---|---|---|---|
| C1 `motionless' | 5.8±2.7 | 1 | 13 |
| C2 `moving' | 6.5±1.9 | 2 | 11 |
| C3 `active walking/swimming' | 2.6±1.8 | 0 | 7 |
| C4 `spasms' | — | 0 | 0 |
A total of 33 observations was performed throughout the 24 h of Expt 2, the first 5 h of Expt 3 and the first 21 h of Expt 4. All values are assigned to one observation of 15 individuals. Mean ± s.d., mean number of individuals ± standard deviation, based on all 33 sequences; Nmin and Nmax represent the minimum and maximum number of individuals ever observed during one 30 s sequence. According to this table, more than seven individuals actively walking or swimming (C3) would be considered as significantly above the reference level.