Table 1 Summary of oocyte growth stages defined for Serranus atricauda
Oocyte development stage | Description | Diameter (ÎĽm) |
|---|---|---|
Primary growth oocytes (PG) | Polyhedral with a large nucleus where several nucleoli can easily be observed | 24–100 (58.5 ± 18.3) |
Cortical alveolar stage (CA) | Cortical alveoli and lipids appear in the cytoplasm | 86–238 (149 ± 36) |
Early vitellogenesis stage (EVtg) | Corresponds to Vtg1 and Vtg2 oocytes in Brown-Peterson et al. (2011) study, is characterized by the appearance of yolk proteins | 134–397 (254 ± 54) |
Advanced vitellogenesis stage (AVtg) | Yolk cytoplasmatic inclusions enlarge and lipidic droplets surround the nucleus corresponds to Vtg 3 oocytes in Brown-Peterson et al. (2011) study | 286–571 (431 ± 72) |
Oocyte maturation (OM) | Nucleus migrates, the yolk granules and lipids fuse to form a continuous mass | 397–620 (529 ± 47) |
Hydrated oocytes (H) | These oocytes are ready to be released. They have a homogeneous appearance and tend to lose their shape during the histological process, and therefore, their dimensions are difficult to access | 738–957 (845 ± 51) |