Table 4 Parameters related with the development of the gonad of gilthead seabream during the second reproductive cycle.
Months | Testicular stages | Ovarian stages | GSI (%) | Ovarian ratio (%) | Ovarian cell diameter means (μm) | Ovarian nuclear diameter means (μm) | Acidophilic granulocytes (%) |
|---|---|---|---|---|---|---|---|
October- January | Spermatogenesis | Immature | From 1.4 ± 0.2 to 3.7 ± 1.0 and then to 1.8 ± 0.8 | From 44.55 ± 15.06 to 9.52 ± 5.11 | 32.2 ± 1.7 | 16.62 ± 0.90 | No detected |
February | Spawning | Immature | 1.3 ± 0.4 | 46.45 ± 3.26 | 37.3 ± 1.8 | 19.54 ± 0.91 | 4.79 ± 0.96 |
March | Post-spawning | Immature | 0.52 ± 0.04 | 66.26 ± 3.71 | 39.6 ± 1.8 | 21.93 ± 0.99 | 1.12 ± 0.24 |
April-July | Testicular involution | Growth: vitellogenic oocytes in yolk vesicles stage | 0.41 ± 0.05 | From 74.43 ± 10.78 to 88.50 ± 4.20 | 51.5 ± 1.8 | 26.82 ± 0.98 | From 8.76 ± 1.24 to 3.69 ± 0.67 reaching the maximum value in may (9.25 ± 1.23) |