Fig. 7From: The consistent difference in red fluorescence in fishes across a 15 m depth gradient is triggered by ambient brightness, not by ambient spectrumComparison of overall brightness (a, b) and spectral shape (c, d) between field and lab measurements. Spectral curves are given as total photon irradiance (photon s−1 m−2 nm−1). Note that c and d represent area-normalized curvesBack to article page