|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 3. Detection of breaths during a surface interval. We interpreted the cyclic
kinematic (bottom panel) and repeatable acoustic (top two panels) patterns
during surface intervals as a series of breaths. As the tag breaks the
surface, a signal was evident in both the waveform (middle panel) and
spectrogram (top panel). These events (marked by dashed red arrows) coincided
with minima in the dive profile (gray trace) and were phase coupled with the
body pitch record (black lines), such that dive profile minima occurred when
the body was level (pitch=0 deg.). Here we show a 3.7 min surface interval
with 17 breaths following a foraging dive that included 15 lunges at depth
(the dive shown in Fig. 4).
|
