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Figure 1 | Reproductive Biology and Endocrinology

Figure 1

From: Melatonin blocks inhibitory effects of prolactin on photoperiodic induction of gain in body mass, testicular growth and feather regeneration in the migratory male redheaded bunting (Emberiza bruniceps)

Figure 1

Experimental design. Both experiments had three phases: phase 1- pretreatment with 8 hours light: 16 hours darkness (8L:16D); phase 2- injection phase under natural day length (experiment 1) or 14L:10D; phase 3- uninjected phase. Arrows on top indicate time of injections (left: zeitgeber time (ZT) 9.5 – melatonin; right: ZT 10 – prolactin or vehicle; ZT 0 = the time of sunrise for the experiment 1, the time of onset of light for the experiment 2). Lines at the base of phase 2 indicate number of days of injection. The experiment 1 was terminated after 23 days and the experiment 2 was terminated after 22 days from the beginning of the phase 2.

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Reproductive Biology and Endocrinology

ISSN: 1477-7827

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