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Fig. 6. Eliminating the UV part of the spectrum in the polarization stimuli impairs e-vector discrimination. The UV part of the spectrum in both stimuli was removed using a 450 nm long-pass filter (40 trials per fish, N=2). Each point represents the percentage of correct choice frequency (mean ± S.E.M.) between the reference and comparison e-vectors. The horizontal dashed line indicates 50% choice, i.e. random choice between the two stimuli.





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