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Fig. 33. (A) Sagittal section through the OP of masu salmon embryo on Day 36. (B) Higher magnification of “A”. sGnRH-ir fibers (arrowheads) are observed. (C) Sagittal section through the pituitary of masu salmon just after hatching (Day 80). Arrowhead indicates sGnRH-ir fiber. (D) Sagittal section of masu salmon embryo on Day 40 showing neuronal somata expressing sGnRH mRNA in the vicinity of the OE. This figure corresponds to Fig. 32A. (E) Sagittal section through a fish at Day 60 showing neuronal somata expressing sGnRH mRNA as a few small clusters, emerging from the OE, along the ON. This figure corresponds to Fig. 32B. (F) Sagittal section through the ON of masu salmon on Day 80 showing neuronal somata expressing sGnRH mRNA at transitional area between ON and OB. This figure corresponds to Fig. 32C. Bar indicates 20 μm. With kind permission from Springer Science+Business Media: Cell and Tissue Research, Ontogenic development of salmon GnRH and chicken GnRH-II systems in the brain of masu salmon, 293, 1998, 427–434, Amano et al., Figs. 2, 3, © 1998, Springer-Verlag.

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