Activity
The calculated threshold to define the activity status as “active” for the experimental day was 0.0134 g, with a 94.2% accuracy. Using this threshold, turtles were significantly more active during the day (76.6%) than at night (54.3%).
Heart rate
When modeling the effect of acceleration, time of the day (day/night), and time index with average heart rate as a response variable (using turtle ID as a random effect), the interaction of day and nighttime with ODBA (acceleration) had both a significant positive effect on heart rate (meaning when activity increased, heart rate also increased).
Heart rate + Activity + Breathing frequency
The following graph summarizes my thesis; it describes the average heart rate, inferred breaths per minute, and average ODBA (acceleration) per minute during the 28 hours. With this graph, we can see that there were considerable individual differences when trying to look into patterns in these three parameters.
