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. 2015 Sep 9;5:13715. doi: 10.1038/srep13715

Figure 4. Correlation analysis of noradrenaline (NA), dopamine (DA) and serotonin (5-HT) content between organs at different stages of the sexual cycle of Perna perna at the Moroccan sites of Bouknadel, Mohammedia and Hay El Fath.

Figure 4

The different stages (St 0 + IIID; StI + II; St IIIA and egg-laying) are approximate (see Fig. 2 legend). The Spearman’s rank order correlation test was used to establish correlations (p < 0.05) between individual measures. These correlations were either positive (plain line showing an association between cases) or negative (double lines).