Table 2.
Feature of the ovarian area of the gonad of gilthead seabream during the second reproductive cycle.
| Months | Types of cells present in the ovary | Cell diameter (μm) | Nuclear diameter (μm) | Cytoplasm | Nucleus | Follicle related structures |
| October-March | Oogonia | 16.2 ± 0.3 | 9.3 ± 0.2 | Slightly basophilic | A nucleolus | |
| Pre-perinucleolar oocytes | 35.0 ± 0.8 | 18.0 ± 0.4 | Highly basophilic | Two or three centrally located nucleoli | ||
| April-July | Early perinucleolar oocytes | 57.6 ± 1.0 | 29.6 ± 0.6 | Highly basophilic | Numerous nucleoli | |
| Late perinucleolar oocytes | 84.1 ± 3.3 | 46.9 ± 2.0 | Highly basophilic | Numerous nucleoli close to the nuclear envelope | Granulosa | |
| Vitellogenic oocytes at yolk vesicle stage (cortical alveoli stage) * | 96.2 ± 2.6 | 51.0 ± 2.1 | Weak basophilic Granules randomly distributed |
Numerous nucleoli close to the nuclear envelope | Granulosa Zone radiate |
|
* In April-July also appeared the germ cell types present in the ovary in October-March