between clinging and side-crawling was 144.0 min, much shorter
than the same period at 15 °C. In addition, the period between
feeding and bottom-crawling at 30 °C was only 62.2 min, the shortest
period observed between two behaviors.
In accord with the results from cross-spectral analysis, the Markov
chain analysis showed higher self-transition probabilities (probabilities
of maintaining the same behavior from one time point to the next) at
lower temperatures, for both motionless and motion behaviors
(Fig. 7). The self-transition probabilities for motion behaviors decreased
particularly strongly with increasing temperature. For example, the
highest self-transition probability for the bottom-crawling behavior
(0.85) was observed at 15 °C, whereas the lowest (0.30) was observed
at 30 °C. When bottom-crawling at 30 °C, the snails showed a higher
probability (0.42) of transitioning to side-crawling than of continuing