...://www.biologists.com/user-licence-1-1/ Summary: Vertically barred patterns provide protection for prey from visual predators even when they mismatch the spatial frequency of background habitats. Visual ecology Predator–prey relationships Fourier analysis Animal behaviour Disruptive camouflage...

... with a double-pulsed call and an atypically slow pulse rate for the genus. Call recognition in this species is unusual because females require the presence of two alternating pulse amplitudes in the signal. A Fourier analysis of the stimulus-envelopes revealed that females respond only when both the first...

... microscopy and Fourier analysis to compare the color and nanostructure of an amelanotic Steller's jay ( Cyanocitta stelleri Gmelin) feather with a normal blue Steller's jay feather. As a control, we also examined a white domestic chicken ( Gallus gallus Linnaeus) feather. The pale amelanotic jay feather had...

... optic spectrophotometry, transmission electron microscopy (TEM) and 2D Fourier analysis to investigate the physical mechanisms of structural colour production in twelve lepidopteran species from four families, representing all of the previously proposed anatomical and optical classes of butterfly...

...-dimensional (2-D) Fourier analysis of TEMs of the collagen arrays revealed a ring of peak spatial frequencies in the spatial variation in refractive index that are the appropriate size to make the observed ultraviolet–yellow colours by coherent scattering alone. One species, Philepitta castanea (Eurylaimidae...

... arrays, whereas Neodrepanis tissues were quasiordered. Predictions of the peak hues of reflectance (λ max ) using Bragg’s law were relatively accurate, but Bragg’s law requires physical assumptions that are obviously violated by these structures. A two-dimensional discrete Fourier analysis of the spatial...

.... * e-mail: walker@fmppr.fmnh.org 14 1 1998 5 3 1998 © 1998 The Company of Biologists Limited 1998 locomotion velocity acceleration performance biomechanics movement analysis fast start Fourier analysis spline analysis filters simulated data Functional...

... frequency evoked opposite results, as the second harmonic, f2, of the male EOD was relatively four times stronger than that of the female EOD ( Table 4 ). Eigenmannia responded to jamming signals as if it performed a limited spectral amplitude (Fourier) analysis, determining the intensity of that stimulus...