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. 2019 Jul 31;95(7):343–357. doi: 10.2183/pjab.95.025

Figure 2.

Figure 2.

(Color online) Involvement of the circadian clock in photoperiodic time measurement. A light pulse given at a specific time of the day, called the “photoinducible phase” (highlighted in orange), is sufficient to induce gonadal growth. The circadian clock is thought to be involved in generating this photoinducible phase, but the exact mechanism remains unclear. Figure adapted with permission from RightsLink Permissions Springer Nature Customer Service Centre GmbH: Springer Nature. Avian Reproduction. Advances in Experimental Medicine and Biology, vol 1001. Molecular and Neuroendocrine Mechanisms of Avian Seasonal Reproduction, Tamai T.K., Yoshimura T.,105) © Springer Nature Singapore Pte. Ltd. 2017.