Table 3.

Run speeds of N2 worms cultivated at 22°C in isotropic environments of different temperatures and subjected to temporal ramps toward or away from 22°C

	Run speed (mm/min)
Constant temperature
17°C	14 ± 2
21°C	15 ± 2
27°C	16 ± 2
Temporal ramps (0.5°C/min)
17°C → 19°C	15 ± 2
19°C → 17°C	14 ± 2
24°C → 26°C	19 ± 4
26°C → 24°C	16 ± 3

Each statistic represents ∼20 measurements. Run speed increases slightly at higher ambient temperatures but is not modulated as part of thermotactic strategy. These experiments conducted with worms cultivated at 15°C or 25°C yielded no detectable differences from these worms cultivated at 22°C (data not shown).