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Fig. 9. Ovarian development of pond-reared Marsupenaeus japonicus in (a) December, (b), (c) April, and (d) May. Oocyte development is classified as previtellogenic oocytes (Pre), endogenous vitellogenic oocytes (Endo), and exogenous vitellogenic oocytes (Exo). FC, follicle cell. Bars: 0.1 mm. (a), (d) Hematoxylin and eosin staining. (b), (c) Hematoxylin-periodic acid-Schiff staining. Reprinted from Comparative Biochemistry and Physiology Part A, 147A, Okumura et al., Vitellogenin gene expression and hemolymph vitellogenin during vitellogenesis, final maturation, and oviposition in female kuruma prawn, Marsupenaeus japonicus, 1028–1037, Copyright (2007), with permission from Elsevier.

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