Skip to main content
. 2021 Apr 14;11(4):1121. doi: 10.3390/ani11041121

Figure 1.

Figure 1

Ontogeny of relative mRNA expression of opsin 4 (OPN4; (A)), opsin 5 (OPN5; (B)), gonadotropin releasing hormone (GnRH; (C)), and gonadotropin inhibitory hormone (GnIH; (D)). Relative OPN4 expression was high just after hatch then dropped over the first 6 weeks of life, then once again increased prior to the increase in relative GnRH mRNA expression. OPN5 expression remained low until prior to the increase in GnRH expression. No differences were observed in GnIH relative mRNA expression at any age. Letters indicate statistically different groups at p < 0.05.