File:Astyanax aff. bimaculatus (10.3897-zoologia.36.e30610) Figures 1–6.jpg

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Description Figures 1–6; Photomicrographs of ovaries of Astyanax aff. bimaculatus in different phases of gonadal maturation. (1) Immature. Oocytes in primary growth (PG) ovuligerous lamellae (OL). (2) Developing. Presence of oocytes of different sizes (PG, CA, Vitg1 and Vtg2). (3–4) Spawning Capable. Predominance of vitellogenic oocytes (Vtg3). (5) Regressing. Presence of different types of oocytes (PG, CA, Vitg1, POF) and oocytes in atresia (A). (6) Regenerating. Oocytes in primary growth (PG) and POF. (OW) ovarian wall, (CA) cortical alveoli, (Vtg1) primary vitellogenic, (Vtg2) secondary vitellogenic, (Vtg3) tertiary vitellogenic, (MB) muscle bundle, (DBV) dilated blood vessels, (POF) postovulatory follicles, (A) atresia. Staining haematoxylin and eosin (HE). Scale bar: 100 μm.
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Source https://zoologia.pensoft.net/article/30610/list/2/ (license)
Author Araújo FG, Nascimento AA, Gomes ID, Sales A, de Oliveira BAC (2019) Gonadal development and reproductive period of the characin Astyanax aff. bimaculatus (Characiformes: Characidae) in a tropical reservoir in southeastern Brazil. Zoologia 36: 1-14. https://doi.org/10.3897/zoologia.36.e30610
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