Fig. 5
From: Coupling spectral analysis and hidden Markov models for the segmentation of behavioural patterns
The different behavioural states inferred with the fitted five-state HMM are represented along the depth time series (a). The tidal signature associated to state St1 (b) and diurnal rythms (c-d) associated to state St3 and St5 are also represented. The differences in daily mean depth (c) and variability (d) between day and night are representative of diurnal changes in the position in the water column and activity levels, respectively. St2 and St4 represent intermediate activity levels and are not characterized by a tidal signature nor a clear diurnal rhythm, respectively. The behavioural analysis is reported for one individual tagged at Saint-Quay (Tag # A10639)