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Fig. 4 | Movement Ecology

Fig. 4

From: Circadian behaviour of Tectus (Trochus) niloticus in the southwest Pacific inferred from accelerometry

Fig. 4

Mean power spectra (Lomb–Scargle procedure) for light intensity and number of identified movements. Light intensity (black lines) and movements (grey lines) were summed for 10 topshells over 30-min interval in New Caledonia (a) and Vanuatu (b). Dotted lines, p < 0.001. The main spectral peak corresponded to a period of 23.15 h, and secondary spectral peaks to harmonic frequencies at 8 h and 12 h

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