Table 5 Parameters related with the development of the gonad of gilthead seabream at end of the second reproductive cycle/beginning of the third reproductive cycle.
Months | Testicular stages | Ovarian stages | GSI (%) | Ovarian ratio (%) | Ovarian cell diameter means (μm) | Ovarian nuclear diameter means (μm) | Acidophilic granulocytes (%) |
|---|---|---|---|---|---|---|---|
October | No further development | 0.82 ± 0.10 | 97.9 ± 0.4 | 58.6 ± 2.0 | 28.2 ± 1.1 | 3.1 ± 0.7 | |
No further development | Growth: vitellogenic oocytes at secondary yolk vesicle and tertiary yolk vesicle stages | 101.2 ± 5.7 | 51.2 ± 2.4 | ||||
November | 1.72 ± 0.13 | ||||||
Spermatogenesis | Atretic follicles Oogonia Pre-perinuclear oocytes Early and late perinuclear oocytes Vitellogenic oocytes at yolk vesicle stage | ||||||