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Fig. 4 | Movement Ecology

Fig. 4

From: Uncovering periodic patterns of space use in animal tracking data with periodograms, including a new algorithm for the Lomb-Scargle periodogram and improved randomization tests

Fig. 4

Tracking data from one waved albatross. Left: plotted with color scale indicating moon phase. Blue colors are close to the new moon and red colors to the full moon. Right: periodograms. The black periodogram is from the tracking data and the red periodogram is from the sampling schedule. The presence of a peak in the black periodogram for a period of one lunar cycle (vertical line), and its absence in the red periodogram, indicate that the periodic pattern is not caused by the sampling schedule

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