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 during the night (54.3%).
Heart rate
When modelling the effect of ODBA and time of the day (day/night) with average heart rate as a response variable (using turtle ID as a random effect), ODBA had a significant positive effect on heart rate during both day and night (𝑝 < 0.001), meaning when activity increased, heart rate also increased).
Activity x Heart rate x Breathing frequency
The following graph summarizes my thesis. This graph describes the average heart rate, inferred breaths per minute, and average ODBA per minute during the 28 hours, per individual. With this graph, we can see considerable individual differences when looking into patterns in these three parameters, and that average heart rate and inferred breaths per minute follow a similar pattern.
