Fig. 3From: Circadian rhythm of melatonin secretion and growth-related gene expression in the tiger puffer Takifugu rubripes Daily and circadian rhythms of melatonin secretion in the plasma of tiger puffer under 12L:12D (a) and continuous light (b) conditions. Means represented by different letters are significant (P < 0.05). Values are mean ± SEMBack to article page