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Figure 3 | Reproductive Biology and Endocrinology

Figure 3

From: Opposing effects of D-aspartic acid and nitric oxide on tuning of testosterone production in mallard testis during the reproductive cycle

Figure 3

Concentrations of D-Asp, NO levels and titers of testosterone in the testes of A. platyrhynchos during the reproductive period (RP) and non reproductive period (NRP). D-Asp concentration was higher in RP, corresponding to maximum testosterone titre and to minimum NO level. Each point represents the mean value ± S.D. from six individual ducks. **, p < 0.01, Reproductive versus Non Reproductive period.

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