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Fig. 6 | BMC Research Notes

Fig. 6

From: The consistent difference in red fluorescence in fishes across a 15 m depth gradient is triggered by ambient brightness, not by ambient spectrum

Fig. 6

Maximum and minimum fluorescence brightness of Tripterygion delaisi eyes. Iris fluorescence brightness measured as total photon radiance (photon s−1 sr−1 m−2), based on 20 freshly caught fish at euryspectral (−5 m) and stenospectral (−20 m) depths, 20 fish measured after the spectrum experiment, and 19 fish measured after the brightness experiment. Cross lines represent significant differences between groups with significance level indicated (*p < 0.05, **p < 0.01). Note that measurements cannot be directly compared between experiments due to non-standardized measuring conditions

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